"Pseudo-MPEC" for EQUULEUS

Created 2023 Mar 30 16:20:07 UT using Find_Orb

Click here for an explanation of pseudo-MPECs

You can click here to get custom ephemerides for this object from Horizons. There's not a lot of information about this object on-line, but you can click here for some info on EQUULEUS.

This object was first found as a tracklet on 2023 Feb 26 by ATLAS, but (aside from one tracklet later determined to be spurious) there was no follow-up at that time. I wasn't even sure it was an artsat.

It then was found by ATLAS again on March 18 as a 'new' object, and recognized as possibly of interest. I thought we might lose it, but fortunately, Quanzhi Ye found images of it in (I41) ZTF images, which enabled further follow-up.

Eventually, we had enough data to link A10T4rQ = A10TGEB, but the residuals are systematically bad, and the usual non-gravitational models didn't fit, suggesting a maneuvering object rather than one pushed around by solar radiation pressure. Photometry also supported the object being artificial, and I started thinking we might be seeing glints from solar panels.

Scott Tilley and Jonathan McDowell separately suggested that we might be looking at an Artemis-1 cubesat, possibly EQUULEUS. JAXA didn't provide detailed ephemerides, but the overall picture seemed to match the orbit we'd determined, and they gave a particular distance to EQUULEUS on their Tw___er feed that matched this ephemeris.

Jon Giorgini was able to get ephems for the object and put them on Horizons. That cinched the identification.

This artsat would normally be much, much fainter; it can only be this bright because we're getting glints from the solar panels. You'll see odd changes in the brightness below, depending on whether we're getting sunlight beamed at us or not. I assume that the actual magnitude will generally be faint, especially at lower elongations.

The object will go to the Earth-Moon L2 point. I don't know where it will go after the mission ends this summer.

 
 Astrometry: 
     A10T4rQ* C2023 02 26?a4R*ZPF4vKG80W?2n$#FV.AfDlj31RG=6[m7ojbq\'m\na:q.JYW68
     A10T4rQ  C2023 02 26)k#y7H2IT4@jo4'?XD6n`qav?HjjVoI_`M9wOK)_AsU/UtAyd5_[W68
     A10T4rQ  C2023 02 26P6UxE/uoH5vagK3g.Lb'[K6Ul5s[uU110dk/sgXAT]iYJ1gvMIXyW68
     A10T4rQ  C2023 02 26_gEOa[Jpl5Z0Zi)GH%$Vbmj2X1b,Z@+t.*IIeM?2yBvBxj+!GIk3W68
     A10T4rQ  C2023 02 26(uh7pMeXWh'woF/1y+aAe_fJ;gqe2^G445%*bjAstrometrybsXiW68
     A10T4rQ  C2023 02 26pMiY8h?T/*mOU/NNeO=ydB]gySyh$'1]syredacted;VMbaAl*.vW68
     A10TGEB  C2023 03 16X7a-.:KPQ+qP^qrR)K\0yyq@kg$Sd\j%CxtH)K-TVEKNb#2)HL(GF52
     A10TGEB  C2023 03 16DleF)j/9C]a.HZm`m/=YKF'RN)v*u;0uE@T?ckZCy(#rP=?_[xe'F52
     A10TGEB* C2023 03 18%=0bm:^.%3S+SaKpR+m,hq$hCWIuB+T_;=R/U;4hntv0EFb*:HLeW68
     A10TGEB  C2023 03 18DS##xDbS^#pjfK+UmOidt6X*O+o/)H3+%1*ghDhX1mfa;*(itb!$W68
     A10TGEB  C2023 03 187`sGjB4uGE%iG3,Zxxd;pYERHt:$R,dLSTHA*Ifc8^ekE$EwC`m_W68
     A10TGEB  C2023 03 18y%Y9)2yG8,:M`=:I0R46C3:h0]NW:hV?GJ3II%V%s)e7wiGPW7MkW68
     A10TGEB  C2023 03 18.28786211 02 52.349+08 37 49.20   ~3J37 20.07gUNEOCPI41
     A10TGEB  C2023 03 18.28833511 02 52.227+08 37 46.02   ~3J37 20.49gUNEOCPI41
     A10TGEB KC2023 03 18.83231511 09 45.850+07 24 43.20   ~3JDt 20.2 GVNEOCPJ95
     A10TGEB KC2023 03 18.83437911 09 46.202+07 24 31.64   ~3JDt 20.4 GVNEOCPJ95
     A10TGEB KC2023 03 19+UCD3]2CV4mX!q[['aT0EboFlM]?ri5Mf4`I*YhQ7jr%)33n:YVcH36
     A10TGEB KC2023 03 19Y6=u.`16LyvOyZ.hfy2hK7r9$fS]v=x-4soN^+T]\)]k%\DkKo(CH36
     A10TGEB KC2023 03 19.15136011 13 07.871+07 03 01.30   ~3JDt 19.40GVNEOCPI52
     A10TGEB KC2023 03 19.15228811 13 07.795+07 02 57.05   ~3JDt 19.66GVNEOCPI52
     A10TGEB  C2023 03 19.15241 11 13 07.68 +07 02 58.3    ~3L1P 19.5 GVNEOCP703
     A10TGEB KC2023 03 19.15321611 13 07.799+07 02 52.58   ~3JDt 19.80GVNEOCPI52
     A10TGEB  C2023 03 19.15359 11 13 07.58 +07 02 51.7    ~3L1P 20.1 GVNEOCP703
     A10TGEB KC2023 03 19.15414311 13 07.784+07 02 48.44   ~3JDt 19.41GVNEOCPI52
     A10TGEB KC2023 03 19b`c;x_2o7?)041Ite,VHCr9HU79Z`uWI\@dZYvOpo2Z^C)X.jhV3H36
     A10TGEB  C2023 03 19.15596 11 13 07.43 +07 02 39.0    ~3L1P 21.4 GVNEOCP703
     A10TGEB 1C2023 03 19`I6o`))F%`o;Z4OmdX=4jxrg[*OKr+92.O\HXen7R`R[Tp9K*)IVQ62
     A10TGEB 1C2023 03 19J_`yd2*#ylR[:ec[/AgjO]*hg$D8c_7Mqv+ph]+]`F%@'hanXj+EQ62
     A10TGEB 1C2023 03 19s*#rB@13G\/R-Rj85lR5Ksp9ZL%Ih$wr'In!Z(HpkU#CEp2kH!qAQ62
     A10TGEB KC2023 03 19q0Vi\59%mjwN9FOMNwCs,!q+K)ws_noVX%o:9t-)K[vqdIE;F?HGJ57
     A10TGEB KC2023 03 196Srs*FXx;i1@i4\Tu?%0;wtdv50o]2_k^Yu*kNy4_sW?-9s\XRlsJ57
     A10TGEB KC2023 03 19Of7LVAmh'^L:4W_bVtGP+@7EmtWE@+OaB!=xvdfW#9K7J1y_0j@HJ57
     A10TGEB KC2023 03 19igvG2pRaWNNM9mmJp,P-V;,7T,GDIhmy5YpAA'o]0vP#jUsP+aFf958
     A10TGEB KC2023 03 19xLyxR#@yUXLPy.7vAu@vHq[NX[nV5@/hr2.Ki)on]#ntuEoJelr\958
     A10TGEB KC2023 03 19'n=n$R44@`F)1iGo_oRb8cubNA[eI[YfP^rLm%Lvjw_!l7=0=UM9958
     A10TGEB KC2023 03 20ZSA]4T#lv]ik?,-F..]KsU[FHS(,C@tRCmDs*cbFT[,;wRI`jNYE204
     A10TGEB KC2023 03 20c%m\OYoQ1mDVfNs)NMd4BbgEHWs[V7`#-vR0VagI_w5gpr;w]O?y204
     A10TGEB  C2023 03 20pd!'8\7Ov:\sGF)IaprFna3Z(q2[J\FK^aUg7pI0=pm@Wd8X2SEP511
     A10TGEB  C2023 03 203(l^n(.PNYnf@$SXtVBk6e8T#p@0opDw=(kE7vMJD9EHFWvSA)C,511
     A10TGEB  C2023 03 20Awckqt`hr^_)^k%1p$$oLJLIYDc#Q*T:uL46n,N-aWk,7VoZKA^Q511
     A10TGEB  C2023 03 20Dd1iNht2B4bHIxp/L#J]n1NJgC*9?BD=-U,5CG@o/Bra9'g,%e=S511
     A10TGEB KC2023 03 205*QtwpB3#Qt8OT`oIIkAe*#R!cWfe!0Obfl*SI5Mbd\3+%%'jc^w204
     A10TGEB  C2023 03 20dGTPMs,7i[SU'7/QM697ro%Xt*_?mw2DJbKDn3PpC1-RbZBUL;JQ511
     A10TGEB  C2023 03 20My[f(cZ:a*#2(KNpUx9g,EO@g_l\/C/.XOLa8`UyE2eM^nC9l6ZR511
     A10TGEB  C2023 03 20[ds#I?_2cIAARG\kb8D-Jd4b22V$H61^T^a##6@#1bV2D!N6E5;c511
     A10TGEB  C2023 03 20J#u6YT8JeP$#7\lLGI]c%IaZRxZg9Ckp?'Pst8JXo:u.fv1#97'!511
     A10TGEB  C2023 03 20qYSQFFOlHMFuG3rY\4s1v:.-=!xxJW/UXU*JrRwrMys:qRv_%.5?511
     A10TGEB  C2023 03 20pv7qO5NyG].Ymm)?yZ7'Y0u*rCBZ2;*/,U^v]7wuyVhl_alsxsSc511
     A10TGEB  C2023 03 20n7%@[!Tmq8V#HnS+_P_,HQE/w?bJLKs=*9x,HF#`VZbK4n0dNIqQ511
     A10TGEB  C2023 03 20!:R5#;'vY2iWrkWu,hUn9Cb#.kMYB(O6Ze97Zt39`WKXH(-Tp=#c511
     A10TGEB  C2023 03 20`?AH0H',PWCdv6V0ipqu)##71N.4knTf=4xK/n)+^_n(f?]a#`nq511
     A10TGEB  C2023 03 20F,lJ:XgXm@]1O+n5i-+8jq1M24gP(^Q^DC/8!PqnpTZF`(5)6@Ak511
     A10TGEB  C2023 03 20S-#At-$2^bW'qo]H@+O?iHSr^s:dG%ghyOl13/Bol,N27G;We*%?511
     A10TGEB  C2023 03 20#=lq5Wr:x:mMaX;p!dvmpKYaLur7YwV\nI-]Z%QX@D`'#UwX?M%i511
     A10TGEB  C2023 03 20R8P$3ImL)IOk,/p8Bj\(K97KV*PE\iOaVRW#-)aV3RBTdGkFr*7O511
     A10TGEB  C2023 03 20VmY`loOvV`Ngc[K$k^VbYEZ-ERl][*nbQdlM@,Ubo73t\q*Dw=av511
     A10TGEB  C2023 03 20wHv*nYep=43nxYArewZ4hmb$dmI0dlbfhl[!1+sEgCQ/`PQ(D9,b511
     A10TGEB  C2023 03 20`/XKs%3:G%u#jZv6Sc3*L)!fZRnXEUt,d-182DRY#'6ma2]nvKyH511
     A10TGEB  C2023 03 20Tih,]FQlu7W(Ho:F!MI(dqCv.8LYkOhkVQU#(Hxt%ZvNtC)!Fe?=511
     A10TGEB KC2023 03 20.pLv_kKM6i*Aya$G9xstTGq7HB[dlaehG0:t!]$B\?F)Xx/QM=xD734
     A10TGEB KC2023 03 20.!b0wxui9:W`$K[%/9EY)k!lCNduLrPi)MgXrNAPyV0bI2b\hkNi734
     A10TGEB KC2023 03 20]Kq!FDtwgW$T5u4aI/7eGei3MKVryE/Jq1Ko+\bjQ!X8Jh)M-+lv734
     A10TGEB KC2023 03 20rsNEUtTE?+:$-P@3@q5xc9@m@(xfXp_Zy^6M9prX!f7bWu6Odhl$104
     A10TGEB KC2023 03 20/_Dk71IbJ^a/N4x`4SLK;h)6$2Ul$YUWUB$qmbXVjFXh,FA2r\UL104
     A10TGEB KC2023 03 20XA[%y:4=L5Mn9D;UWqEW)gP.PD+1J=R,BQ1ILvAmt\H+.Gc74'Av104
     A10TGEB 0C2023 03 20WC@TjZ`PlQg;WgkRZei\qw)44=;09LS3ibXI.%n9mcq4TIot8QkiZ31
     A10TGEB 0C2023 03 20[%XRthFFuYi]k8:rbmeLyhHZEJ5$\AxJAyEUh]F[wS_nre2qlTtFZ31
     A10TGEB 1C2023 03 20itFmcJO^#yx[D['Y2\2rP*]V)qP*:$*-A.\%15_g3clicktfIVE[Z84
     A10TGEB 1C2023 03 208X-Bk^rN/2IZV!Kl[6[t$oojK5ScGa+dRC6ZSmmVMc3)4Y%;8)d-Z84
     A10TGEB 1C2023 03 20M\Xb5udvZ(($=1edg9MTv4:A)R$G:Q)LmrHWI\_Q`XHKC296`m2VZ84
     A10TGEB 0C2023 03 20[LwdYU1s,nEyAG1j^JuD(DpVcpV)L8/#VhXB;6;1)!Swy6uIQ22hZ31
     A10TGEB  C2023 03 20;NZK,7mY/]I$U[t^6ukgt'bwCn/VpQKx2v*#j#6S:_1ot+-exRTZK63
     A10TGEB KC2023 03 20oQWc:gYl9WXi[Ysqf30w(_]i$cgVr!K#Y4FGd9%B)uWn()'8ZcQ=K63
     A10TGEB KC2023 03 20RU[sf-u70.NTMlH,4Q'EmOMPVf1?q(KM=E9Jt*[(0c68V^DDij]U104
     A10TGEB KC2023 03 20=gf]R_U[1(R0u#*%^2j!(Wa*`Fgpc/\Gauv`^OpYR^jf(ki0#*kYK63
     A10TGEB  C2023 03 204+%V!he753k#sORDb^x!Ne)s.nvl_hereUZjZ6F#U]l\J^_xgkBPK63
     A10TGEB  C2023 03 20O@QW_ZPG(M9g\t2=dX@@o2V@J;r8`nB5hslN-Bu6IiW,ci#'!CGKK63
     A10TGEB KC2023 03 20/WE4r=LX1nGyAm'N6W_FvEc?HjuEl/IECvo.'=0Z8#b@9?_S?5R\104
     A10TGEB KC2023 03 20.!]Fr]Uv(RLD!4KD,0HHQ;AjH`%UBgVHKVu.fK7Q5@ea8dGIfoT[104
     A10TGEB  C2023 03 21jD*P#_LjoN;%#Jk(;dYP^forykvclyO;S0+Qn5T-;yj:(GMP37cOL01
     A10TGEB  C2023 03 21b/LKV%Tq3eWdYlsgbLC,f%S_-]rxG6N/50Yi[l.81h_^/G0,SP2`L01
     A10TGEB  C2023 03 21isDqERE.,yCYgx%ujjcONLP8Y)CEj2hN53[5AA4?8G,6M'Z=EdFqL01
     A10TGEB  C2023 03 21:8*x5)BH!0Pkwe-n]Ei5CKo:pY:ANSLLh/njeXuVU`6sm*1lT'C%L01
     A10TGEB  C2023 03 21Q^u0x=8+CdN,Xrqjm'ET=s!*n8O^mk6d)vaHJHZv?Kj!pxCStM!QL01
     A10TGEB  C2023 03 21@QQ8explanation1i+%J`UebY3BV-m.xaQ!i-,/^]GoL,L+VfaBNL01
     A10TGEB  C2023 03 21@/JPPJ6(+w4`@AlO%OPNU7T`Gt!CvSMLoE#t[+%2??S:1\?:3Ho$L01
     A10TGEB  C2023 03 21V/KQ1oS-HZ3q%jE`v$soCLdT.)nu+=ybM%m8tEv[2G`#mGSKtof#L01
     A10TGEB  C2023 03 21bJL^Ui7qpd.jeS@F@h`C5av`[x/[e3D5_\D(MyDZ-hy;/y[Q`$@GL01
     A10TGEB  C2023 03 21T]Rjq#`R_DUw$5+l5FU4[`t_v9aYEQQq.H1$pZK8;++*+:fUm%[iL01
     A10TGEB  C2023 03 21rvqMSB5!T9V$6*OE!4O`(G]n+s7Wo9NwGK2%LX]BIg8xf9foSnqYL01
     A10TGEB KC2023 03 21,e%#utp#q=(*@-0Rk,!2DSS]sH6h?IN_gSbMXsyP]JcG.SXAw1t4H21
     A10TGEB KC2023 03 21+v$MpMUUn.qd5)]4Y9K)Wr`eK`)4641:;[Apj5Xaynj7\$*.aaZGH21
     A10TGEB KC2023 03 21M`egbIS7gmSHi#8$\SX*CIfGSN/o/0voPc1y?d6,2CT!GFY]y7gwH21
     A10TGEB  C2023 03 21:-xH\a=ErmnH0%!Pj7\[k#\76?kN`hBmfj)NaN.vH?#oF:QHOv%1F51
     A10TGEB  C2023 03 21h;*YCj!@8g0uoL$oZqytHiJP)*yhwBYxbK@MFiSJ_3%0g[_5^Ni.F51
     A10U2hC  C2023 03 25.43751311 55 31.747-01 03 53.21   .50   18.29oV!    T05
     A10U2hC  C2023 03 25.44113211 55 30.290-01 04 08.62   .50   18.21oV!    T05
     A10U2hC  C2023 03 25.45951511 55 22.918-01 05 25.69   .50   18.15oV!    T05
     A10U2hC  C2023 03 25.46664511 55 20.150-01 05 55.32   .50   18.84oV!    T05
     3CS2421 KC2023 03 29.19424 12 20 42.25 -05 14 17.9    .50   16.9 GV!    W94
     3CS2421 KC2023 03 29.20060 12 20 39.83 -05 14 47.7    .50   17.6 GV!    W94
     3CS2421 KC2023 03 29.20684 12 20 37.47 -05 15 16.8    .50   17.2 GV!    W94
     C3N0RH1  C2023 03 29.31822 12 21 33.97 -05 56 41.2    .50   19.1 GV     703
     C3N0RH1  C2023 03 29.32358 12 21 32.39 -05 57 06.0    .50   18.9 GV     703
     C3N0RH1  C2023 03 29.32894 12 21 30.70 -05 57 31.2    .50   18.6 GV     703
     C3N0RH1  C2023 03 29.33432 12 21 29.07 -05 57 56.9    .50   19.0 GV     703

Station data:
(104) San Marcello Pistoiese  (N44.064178 E10.803750)  Italy.  Observers P.
   Bacci, M. Maestripieri. Measurers P. Bacci, L. Tesi, G. Fagioli. 0.60-m
   reflector + CCD.
(204) Schiaparelli Observatory  (N45.868330 E8.769930)  Italy.
   Observer L. Buzzi. 0.60-m f/4.64 Newtonian + CCD0.84-m f/3.5 reflector +
   CCD.
(511) Haute Provence  (N43.931873 E5.715700)  France.  Observers W.
   Polycarpe, M. Dennefield, W. Thuillot, B. Carry, P. David, S. Bouquillon,
   F. Taris, P. Tanga, M. Delbó, E. Saquet, V. Robert. Measurers W. Thuillot,
   S. Bouquillon, F. Taris, T. Carlucci, C. Barache. 1.20-m f/6 reflector +
   CCD.
(703) Catalina Sky Survey  (N32.417003 W110.732640)  US/Arizona.  Observers
   G. J. Leonard, D. C. Fuls. Measurers E. J. Christensen, D. Fay, J. B.
   Fazekas, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Gröller, J. K. Hogan,
   R. A. Kowalski, S. M. Larson, G. J. Leonard, D. Rankin, R. L. Seaman, A.
   Serrano, F. C. Shelly, K. W. Wierzchoś. 0.68-m Schmidt + 10K CCD.
(734) Farpoint Observatory, Eskridge  (N38.890104 W96.001400)  US/Kansas.
   Observer G. Hug. 0.69-m reflector + CCD.
(958) Observatoire de Dax  (N43.693324 W1.030390)  France.  Observer P.
   Dupouy. 0.32-m Schmidt-Cassegrain.
(F51) Pan-STARRS 1, Haleakala  (N20.707234 W156.255910)  US/Hawaii.
   Observers J. Bulger, T. Lowe, A. Schultz, M. Willman. Measurers K.
   Chambers, S. Chastel, T. de Boer, L. Denneau, J. Fairlamb, H. Flewelling,
   M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo, R. Wainscoat, R. Weryk.
   1.8-m Ritchey-Chrétien + CCD.
(F52) Pan-STARRS 2, Haleakala  (N20.707382 W156.255910)  US/Hawaii.
   Observers J. Bulger, T. Dukes, T. Lowe, A. Schultz, M. Willman. Measurers
   K. Chambers, S. Chastel, T. de Boer, L. Denneau, J. Fairlamb, H.
   Flewelling, M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo, R. Wainscoat,
   R. Weryk. 1.8-m Ritchey-Chrétien + CCD.
(H21) Astronomical Research Observatory, Westfield  (N39.483054 W87.968270)
   US/Illinois.  Observer R. Holmes. Measurers S. Foglia, L. Buzzi, T.
   Linder, R. Holmes. 0.76-m f/3.0 astrograph + CCD0.81-m f/4.0 astrograph +
   CCD0.61-m f/4.5 astrograph + CCD0.40-m f/5.32 astrograph + CCD.
(H36) Sandlot Observatory, Scranton  (N38.797690 W95.706400)  US/Kansas.
   Observer G. Hug. 0.56-m reflector + CCD.
(I41) Palomar Mountain--ZTF  (N33.357338 W116.859780)  US/California.
   Observers B. T. Bolin, Z. T. F. Collaboration. Measurers B. T. Bolin,
   Z.-Y. Lin, F. J. Masci. 1.2-m f/2.4 Schmidt.
(I52) Steward Observatory, Mt. Lemmon Station  (N32.442544 W110.788920)
   US/Arizona.  Observers T. A. Pruyne, B. M. Africano, E. J. Christensen, G.
   A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Gröller, J. A.
   Johnson, R. A. Kowalski, S. M. Larson, G. J. Leonard, D. Rankin, R. L.
   Seaman, F. C. Shelly, K. W. Wierzchoś. 1.0-m prime focus + CCD.
(J57) Centro Astronómico Alto Turia, Valencia  (N39.950156 W1.109110)  Spain.
    Observer A. Fornas. Measurers E. Arce, V. Mas, G. Fornas. 0.43-m f/6.8
   reflector + CCD.
(J95) Great Shefford  (N51.474969 W1.447003)  UK/England.  Observer P.
   Birtwhistle. 0.41-m f/6.3 Schmidt-Cassegrain + CCD.
(K63) G. Pascoli Observatory, Castelvecchio Pascoli  (N44.082407 E10.462000)
   Italy.  Observer R. Bacci. 0.41-m f/3.2 Newtonian reflector + CCD.
(L01) Višnjan Observatory, Tičan  (N45.290897 E13.749300)  Croatia.
   Observers K. Korlević, D. Pujagic, V. Dobos. Measurers D. Pujagic, K.
   Korlević. 1.0-m f/2.9 reflector + CCD.
(Q62) iTelescope Observatory, Siding Spring  (S31.273286 E149.064420)
   Australia/NSW.  Observer H. Sato. 0.51-m f/6.8 astrograph + CCD + f/4.5
   focal reducer0.43-m f/6.8 astrograph + CCD + focal reducer0.43-m f/6.8
   astrograph + CCD0.10-m f/5 astrograph + CCD0.127-m f/5.6 refractor +
   CCD0.50-m f/6.8 reflector + CCD0.30-m f/9 reflector + CCD.
(T05) ATLAS-HKO, Haleakala  (N20.707582 W156.257008)  US/Hawaii.  Observers
   L. Denneau, A. Heinze, H. Weiland, J. Tonry, H. Flewelling, A.
   Fitzsimmons, D. Young, B. Stalder. Measurers L. Denneau, A. Heinze, J.
   Tonry. 0.5-m f/2.0 Schmidt + CCD.
(W68) ATLAS Chile, Rio Hurtado  (S30.471010 W70.764980)  Chile.  Observers L.
   Denneau, R. Siverd, J. Tonry, H. Weiland. Measurers L. Denneau, N.
   Erasmus, A. Fitzsimmons, A. Lawrence, J. Robinson, R. Siverd, J. Tonry, H.
   Weiland. 0.5-m reflector + CCD.
(W94) MAP, San Pedro de Atacama  (S22.953074 W68.179810)  Chile.  Observers
   A. Maury, G. Attard. Measurers A. Maury, G. Attard, D. Parrott. 0.28-m
   f/2.2 Schmidt + CCD.
(Z31) Tenerife Observatory-LCO A, Tenerife  (N28.300415 W16.511650)  Canary
   Islands (Spain).  Observer M. Micheli. 1.0-m reflector + CCD.
(Z84) Calar Alto-Schmidt  (N37.223981 W2.548143)  Spain.  Observer M. Micheli.
    Measurers E. Schwab, D. Koschny, M. Micheli. 0.8-m f/3 Schmidt + CCD.

Orbital elements:  EQUULEUS
   Perigee 2023 Apr 6.70814357 +/- 0.000799 TT = 16:59:43.604 (JD 2460041.20814357)
Epoch 2023 Mar 29.0 TT = JDT 2460032.5                           Find_Orb
M 228.06405799968 +/- 0.006         (J2000 equator)
n  15.15086895516 +/- 0.000698      Peri.    2.16701961 +/- 0.0006
a349123.014052 +/- 10.7             Node   357.68782918 +/- 0.00006
e   0.8805898855 +/- 9.35e-6        Incl.   35.93242263 +/- 0.00018
P  23.76d                  H 30.09  G  0.15   U  7.9
q 41688.8190591 +/- 4.54    Q 656557.209045 +/- 16.9
98 of 106 observations 2023 Mar. 18-29; mean residual 0".607
Residuals in arcseconds: 
230226 W68( 140- 1696-)   230320 204 .203- .529+    230320 K63 .207+ .474-
230226 W68( 140- 1695-)   230320 511 .727+ 1.68+    230320 104 .098+ .257+
230226 W68( 140- 1692-)   230320 511 .033- .186+    230320 K63 .086- .554-
230226 W68( 140- 1691-)   230320 511 .678- 1.60-    230320 K63 .106- 4.7m-
230226 W68( 139- 1691-)   230320 511 .337+ 1.89+    230320 K63 .356+ .411+
230226 W68( 141- 1691-)   230320 204 .446+ .428+    230320 104 .014+ .186+
230316 F52(14.7- 32.4+)   230320 511 .262+ 1.04+    230320 104 .274+ .194+
230316 F52(13.3- 28.8+)   230320 511 .175- .774+    230321 L01 .055- .088+
230318 W68 .033- .802+    230320 511 .230+ .726+    230321 L01 .319- .206+
230318 W68 .279- 1.00+    230320 511 .108+ 1.29+    230321 L01 .304- .120+
230318 W68 .242- .851+    230320 511 .064+ .460+    230321 L01 .156- .036+
230318 W68 .205- 1.00+    230320 511 .091+ 1.02+    230321 L01 .328- .149+
230318 I41 1.24- 1.08-    230320 511 .097+ .677+    230321 L01 .070- .059+
230318 I41 1.00- .989-    230320 511 .184+ .542+    230321 L01 .124- .086+
230318 J95 .827+ .565-    230320 511 .176+ .981+    230321 L01 .200- .104+
230318 J95 .541+ 1.19-    230320 511 .224+ .590+    230321 L01 .142- .130+
230319 H36 .376- .874-    230320 511 .110+ .861+    230321 L01 .107- .246+
230319 H36 1.24- .123-    230320 511 .123+ .734+    230321 L01 .089- .070+
230319 I52 .211- .194+    230320 511 .044- .548+    230321 H21 8.0m- .045+
230319 I52 .818- .482+    230320 511 .074+ .325+    230321 H21 .254+ .280+
230319 703 1.45- 1.12+    230320 511 .019+ .704+    230321 H21 .087+ .233+
230319 I52 .180- .557+    230320 511 .065- .725+    230321 F51 .199+ .135+
230319 703 2.17- .306+    230320 511 .288- .692+    230321 F51 .376+ .124+
230319 I52 .227+ .962+    230320 734 .132- .028+    230325 T05 .165- .183-
230319 H36 .143+ .569-    230320 734 .115- .097+    230325 T05 .200+ .440-
230319 703 2.61- .755-    230320 734 .045+ 1.03+    230325 T05 .400+ .861-
230319 Q62 1.22- .827-    230320 104 .139+ .272+    230325 T05 .492+ .910-
230319 Q62 .212- .442+    230320 104 .239+ .208+    230329 W94 .329- .179-
230319 Q62 .548+ 1.93+    230320 104 .118+ .150+    230329 W94 .363- .103-
230319 J57 .381+ .753+    230320 Z31 .106+ .127+    230329 W94 .433- .167-
230319 J57 .019+ .552+    230320 Z31 2.0m- .108+    230329 703 .540- .641-
230319 J57 .348- .141-    230320 Z84 .123+ .082+    230329 703 .538+ .065+
230319 958 .142- .435+    230320 Z84 .109+ .102+    230329 703 .254- .164+
230319 958 .131+ .346+    230320 Z84 .079+ .089+    230329 703 .360- .354-
230319 958 1.67- .276+    230320 Z31 .068+ .083+
230320 204 .033- .013+    230320 K63 .363+ .537+

Ephemerides (geocentric):
Date (UTC)   RA             Dec           delta elong  mag  Con " sig PA
---- -----  ------------   ------------  ------ -----  ---  --- --------
2023 03 18  10 59 28.258   +09 31 11.68  480407 165.3 18.4  Leo .188 130
2023 03 19  11 09 57.710   +07 37 33.26  527844 167.6 18.6  Leo .027 159
2023 03 20  11 18 47.253   +06 00 22.14  566426 169.3 18.7  Leo .018  73
2023 03 21  11 26 33.430   +04 33 56.78  597369 170.7 18.7  Leo .022 169
2023 03 22  11 33 38.475   +03 14 43.67  621487 171.9 18.8  Leo .070 139
2023 03 23  11 40 17.293   +02 00 16.94  639331 172.9 18.8  Vir .129 134
2023 03 24  11 46 40.741   +00 48 48.86  651258 173.8 18.8  Vir .183 132
2023 03 25  11 52 57.396   -00 21 06.41  657479 174.7 18.7  Vir .222 131
2023 03 26  11 59 14.644   -01 30 42.95  658084 175.4 18.7  Vir .237 131
2023 03 27  12 05 39.482   -02 41 10.48  653055 176.1 18.7  Vir .216 132
2023 03 28  12 12 19.245   -03 53 41.00  642271 176.7 18.6  Vir .145 135
2023 03 29  12 19 22.420   -05 09 35.95  625498 176.9 18.5  Vir .025  43
2023 03 30  12 26 59.786   -06 30 35.86  602373 176.7 18.4  Vir .261 120
2023 03 31  12 35 26.236   -07 58 55.27  572363 175.9 18.4  Vir .689 123
2023 04 01  12 45 04.137   -09 37 48.89  534702 174.4 18.3  Vir 1.40 123
2023 04 02  12 56 30.255   -11 32 22.72  488270 172.3 18.2  Vir 2.62 123
2023 04 03  13 10 52.234   -13 51 27.44  431362 169.3 18.1  Vir 4.84 123
2023 04 04  13 30 36.338   -16 52 35.33  361206 164.8 17.8  Vir 9.49 122
2023 04 05  14 02 38.896   -21 18 56.59  272702 157.2 17.5  Vir 22.1 119
2023 04 06  15 23 09.668   -29 42 52.96  153830 138.4 16.8  Lib 89.4 110
2023 04 07  05 34 45.880   +35 19 45.59   69311  68.6 17.7  Aur  533  88
2023 04 08  09 34 39.964   +21 28 56.78  215295 121.2 18.0  Leo 58.8 118
2023 04 09  10 19 43.094   +15 08 11.78  316993 132.6 18.5  Leo 27.5 121
2023 04 10  10 43 17.436   +11 24 04.22  395246 138.4 18.8  Leo 17.5 122
2023 04 11  10 59 17.541   +08 44 08.38  457841 142.1 19.1  Leo 12.7 122
2023 04 12  11 11 35.064   +06 37 55.72  508567 144.7 19.2  Leo 9.95 122
2023 04 13  11 21 45.076   +04 51 53.41  549623 146.8 19.3  Leo 8.21 122
2023 04 14  11 30 35.765   +03 18 49.95  582413 148.5 19.4  Leo 7.04 122
2023 04 15  11 38 35.289   +01 54 26.00  607886 149.9 19.5  Vir 6.24 122
2023 04 16  11 46 02.049   +00 35 49.49  626698 151.1 19.5  Vir 5.71 121
2023 04 17  11 53 09.319   -00 39 04.32  639298 152.2 19.5  Vir 5.37 121
2023 04 18  12 00 07.623   -01 51 53.84  645975 153.3 19.5  Vir 5.22 121
2023 04 19  12 07 06.129   -03 04 03.64  646883 154.4 19.5  Vir 5.23 121
2023 04 20  12 14 13.606   -04 16 52.89  642057 155.5 19.4  Vir 5.42 121
2023 04 21  12 21 39.278   -05 31 42.46  631416 156.7 19.3  Vir 5.82 121
2023 04 22  12 29 33.792   -06 50 02.37  614759 157.9 19.2  Vir 6.48 122
2023 04 23  12 38 10.600   -08 13 41.75  591750 159.4 19.1  Vir 7.52 122
2023 04 24  12 47 48.258   -09 45 04.26  561883 161.1 18.9  Vir 9.10 122
2023 04 25  12 58 54.689   -11 27 35.07  524424 163.1 18.7  Vir 11.5 121
2023 04 26  13 12 16.116   -13 26 33.24  478302 165.6 18.4  Vir 15.5 121
2023 04 27  13 29 18.502   -15 51 05.86  421898 168.6 18.1  Vir 22.5 120
2023 04 28  13 53 10.143   -18 58 55.17  352591 171.9 17.5  Vir 36.4 118
2023 04 29  14 32 50.590   -23 30 40.45  265649 170.4 17.0  Lib 73.0 115
2023 04 30  16 13 52.725   -31 04 37.55  150984 150.4 16.4  Sco  257 103
2023 05 01  03 58 37.863   +30 17 36.52   69677  25.4 22??  Tau 1351  76
2023 05 02  08 59 57.406   +23 31 44.35  204744  89.7 19.0  Cnc  167 114
2023 05 03  09 58 21.892   +16 35 28.19  305542 103.9 19.3  Leo 77.7 118
2023 05 04  10 28 08.167   +12 24 31.26  383773 111.2 19.6  Leo 50.5 120
2023 05 05  10 48 08.220   +09 24 14.44  446443 115.9 19.8  Leo 38.0 120
2023 05 06  11 03 25.310   +07 01 30.66  497109 119.3 19.9  Leo 31.1 121
2023 05 07  11 16 01.659   +05 01 20.63  537872 122.0 20.0  Leo 26.8 121
2023 05 08  11 26 58.521   +03 15 42.85  570079 124.3 20.0  Leo 24.1 121
2023 05 09  11 36 51.351   +01 39 46.91  594644 126.2 20.1  Leo 22.3 120
2023 05 10  11 46 03.135   +00 10 19.81  612199 127.9 20.1  Vir 21.1 120
2023 05 11  11 54 50.407   -01 14 58.72  623180 129.5 20.1  Vir 20.4 120
2023 05 12  12 03 26.357   -02 38 00.16  627870 131.1 20.1  Vir 20.2 120
2023 05 13  12 12 02.700   -04 00 21.86  626424 132.6 20.0  Vir 20.3 120
2023 05 14  12 20 51.035   -05 23 37.37  618875 134.2 19.9  Vir 20.8 120
2023 05 15  12 30 04.122   -06 49 25.57  605138 135.9 19.8  Vir 21.8 120
2023 05 16  12 39 57.461   -08 19 40.91  584989 137.7 19.7  Vir 23.4 119
2023 05 17  12 50 51.681   -09 56 47.58  558046 139.8 19.6  Vir 25.8 119
2023 05 18  13 03 16.812   -11 44 02.43  523718 142.3 19.4  Vir 29.4 119
2023 05 19  13 18 00.879   -13 46 16.92  481123 145.4 19.1  Vir 35.1 118
2023 05 20  13 36 29.706   -16 11 21.93  428925 149.3 18.7  Vir 44.7 117
2023 05 21  14 01 41.100   -19 13 18.47  365027 154.8 18.2  Vir 62.8 115
2023 05 22  14 41 16.854   -23 19 58.48  285871 163.1 17.4  Lib  105 112
2023 05 23  16 05 37.269   -29 19 29.12  184851 170.9 16.2  Sco  261 103
2023 05 24  22 37 13.641   -10 05 08.99   67239  85.2 16.8  Aqr 2087  60
2023 05 25  07 42 29.593   +28 15 06.97  160852  49.7 21??  Gem  391 105
2023 05 26  09 22 06.752   +19 44 23.11  267804  72.6 20.4  Leo  149 115

   RA/decs are astrometric J2000 coordinates (corrected for light
time lag,  but in the inertial J2000 frame,  i.e.,  not rotated
for precession or nutation,  and differential light deflection is
not included.)   Display can be turned on/off in the 'advanced
options' for ephemerides.  When turning them on,  you can select
from various format choices (base-60,  decimal, different
precisions,  etc.)

   Distances are in kilometers for distances under one million km
(about 0.00668 AU),  and in AUs for larger distances.

   Uncertainties are one-sigma values shown in arcseconds (unless they
are very large, in which case they are shown in arcminutes or degrees).
In theory,  the object should be within this distance of the nominal
RA/dec 67% of the time,  within twice that distance 95% of the time,
and within three times that distance 99.7% of the time.  In practice,
astrometric errors are not actually Gaussian,  which means these
uncertainties are sometimes over- or underestimated.  So you may have
to look farther,  or not nearly as far,  as the uncertainties say.

   The object will probably be offset from nominal somewhere along the
indicated position angle,  especially if the orbit is well determined.