"Pseudo-MPEC" for ZTF104t = A11rypW = ZTF104y = ZTF104z
Created 2025 Aug 26 18:56:07 UT using Find_Orb
Click here for an explanation of pseudo-MPECs
TLEs are available for this object, and for most of the other objects listed on these pages. This object was previously seen as A11bP7G = A11bzvf = ZTs0276, in 2024 September, and probably before then as well. This chart shows how the object's perigee varies over a roughly 0.9-year cycle. When the perigee is low (and the apogee is correspondingly high), the object's apparent motion at apogee is slow enough for the surveys to "see" and report it. In between, where the perigee is a little higher and the apogee a little lower, it moves too fast to be reported.
Astrometry:
ZTF104t* C2025 08 24.29563721 39 48.618-11 20 18.28 ~8OFG 16.72RUNEOCPI41
ZTF104t C2025 08 24.29598421 39 54.169-11 19 35.91 ~8OFG 16.72RUNEOCPI41
ZTF104t C2025 08 24.29657421 40 03.712-11 18 23.66 ~8OFG 16.69RUNEOCPI41
ZTF104t C2025 08 24.29692121 40 09.281-11 17 41.15 ~8OFG 16.69RUNEOCPI41
A11rypW* C2025 08 24dQ3NAstrometryBc*Q]jmj/%w8LqO6oy]0B[MwJredacted;7$UJT08
A11rypW C2025 08 24,whj)%5vIDUG6ss-0G3xclick]`u-QS=V_:x*w#?MMc(NVGaX1d4T08
A11rypW C2025 08 243w2p7bWB;txU5v_fXhere:'ABUuRV]1hGE!x2Kit(1i#0Dl`for]T08
A11rypW C2025 08 24X:;LA7IP2!-o2Op2*HDU7r]#;:3`,Mwehm7c*explanation`:p!T08
ZTF104y* C2025 08 26.27045122 08 11.483-08 58 59.16 ~8QIQ 16.57RUNEOCPI41
ZTF104y C2025 08 26.27078722 08 17.255-08 58 17.17 ~8QIQ 16.57RUNEOCPI41
ZTF104y C2025 08 26.27667822 09 55.186-08 46 25.85 ~8QIQ 16.51iUNEOCPI41
ZTF104y C2025 08 26.27702522 10 00.904-08 45 43.84 ~8QIQ 16.51iUNEOCPI41
ZTF104z* C2025 08 26.33074122 25 06.508-06 53 34.61 ~8QIQ 17.18gUNEOCPI41
ZTF104z C2025 08 26.33108822 25 12.499-06 52 48.55 ~8QIQ 17.18gUNEOCPI41
ZTF104z C2025 08 26.33167822 25 22.902-06 51 32.64 ~8QIQ 17.14gUNEOCPI41
ZTF104z C2025 08 26.33202522 25 28.952-06 50 47.01 ~8QIQ 17.14gUNEOCPI41
Station data:
(I41) Palomar Mountain--ZTF (N33.357336 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.
(T08) ATLAS-MLO, Mauna Loa (N19.536150 W155.576050) US/Hawaii. Observers
L. Denneau, R. Siverd, J. Tonry, H. Weiland. Measurers L. Denneau, N.
Erasmus, A. Fitzsimmons, J. Robinson, R. Siverd, J. Tonry, H. Weiland.
0.5-m f/2.0 Schmidt + CCD.
Orbital elements: ZTF104t = A11rypW = ZTF104y = ZTF104z
Perigee 2025 Aug 23.82627 +/- 0.0014582 TT = 19:49:49 (JD 2460911.32627)
A1: (13.385 +/- 1.304)e-6 A2: (-1.872 +/- 1.147)e-7
A3: (47.8278 +/- 5.2004)e-8 AU/day^2 [1/r^2]
Epoch 2025 Aug 24.0 TT = JDT 2460911.5 Find_Orb
M 65.34880420 +/- 0.5295 (J2000 equator)
n 376.14889566 +/- 0.11201 Peri. 158.93216 +/- 0.1080
a 41023.2734 +/- 8.1439 Node 345.26935 +/- 0.01869
e 0.6927216 +/- 0.00015114 Incl. 20.96762 +/- 0.01734
P1378.152m/0.957d H 33.38 G 0.15 U 11.3
q 12605.5647 +/- 8.4482 Q 69440.9821 +/- 9.0314
15 of 16 observations 2025 Aug. 24-26; mean residual 1".040
Residuals in arcseconds:
250824 I41 .215+ .205- 250824 T08(56.6+ 27.4+) 250826 I41 1.43- .560-
250824 I41 .459- .265- 250824 T08 .894- .875- 250826 I41 1.64- .475+
250824 I41 .043- .174- 250826 I41 3.07- .788- 250826 I41 1.13+ .220-
250824 I41 .426- .113- 250826 I41 .151- .731+ 250826 I41 1.69+ .326+
250824 T08 .753- .131+ 250826 I41 2.10+ .106+
250824 T08 1.47+ .921+ 250826 I41 1.45+ .038+
Ephemerides (geocentric):
Date (UTC) HH RA Dec delta r elong SM mag Con " sig PA
---- -------- ------------ ------------ ------ ------ ----- -- --- --- --------
2025 08 26 19 17 26 27.389 -20 43 39.23 30298 1.0105 108.7 gm 17.4 Oph 485 89
2025 08 26 20 18 34 03.733 -19 16 45.61 39186 1.0106 124.5 Gm 17.5 Sgr 265 84
2025 08 26 21 19 17 16.282 -17 30 18.95 46559 1.0107 134.7 17.6 Sgr 163 81
2025 08 26 22 19 48 52.192 -15 48 23.33 52645 1.0107 142.4 17.7 Sgr 105 80
2025 08 26 23 20 14 00.931 -14 13 32.61 57625 1.0108 148.5 17.7 Cap 67.7 79
2025 08 27 00 20 35 13.328 -12 44 43.29 61630 1.0108 153.7 17.7 Cap 42.4 78
2025 08 27 01 20 53 53.529 -11 20 20.72 64750 1.0108 158.2 17.6 Aqr 24.5 78
2025 08 27 02 21 10 53.733 -09 58 54.54 67049 1.0108 162.4 17.6 Aqr 11.9 75
2025 08 27 03 21 26 49.505 -08 39 02.76 68570 1.0108 166.1 17.5 Cap 3.73 61
2025 08 27 04 21 42 07.429 -07 19 28.71 69340 1.0108 169.6 17.4 Aqr 2.27 141
2025 08 27 05 21 57 09.478 -05 58 56.24 69371 1.0108 172.4 17.3 Aqr 4.00 140
2025 08 27 06 22 12 15.923 -04 36 03.99 68665 1.0108 173.9 17.2 Aqr 5.90 1
2025 08 27 07 22 27 47.786 -03 09 18.27 67209 1.0108 173.0 17.2 Aqr 13.2 35
2025 08 27 08 22 44 09.553 -01 36 43.10 64979 1.0108 170.1 17.2 Aqr 28.2 50
2025 08 27 09 23 01 53.013 +00 04 15.17 61933 1.0107 166.1 17.3 Psc 53.3 56
2025 08 27 10 23 21 43.873 +01 57 13.71 58010 1.0107 161.2 17.3 Psc 94.0 60
2025 08 27 11 23 44 54.835 +04 07 40.00 53122 1.0106 155.4 17.3 Psc 161 63
2025 08 27 12 00 13 35.352 +06 44 21.90 47144 1.0106 148.0 17.3 Psc 277 66
2025 08 27 13 00 52 11.466 +10 02 23.81 39901 1.0105 138.1 17.2 Psc 502 69
2025 08 27 14 01 51 55.099 +14 27 02.84 31167 1.0104 123.1 17.1 Ari 1026 73
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.
The "SM" (Sun-Moon) flags consist of one or two letters, extended
from a scheme used on JPL's Horizons system. Letters used are :
* Daytime (sun above horizon)
C Civil twilight (sun below horizon, but by less than 6 degrees)
N Nautical twilight (-12 < sun's altitude < -6 degrees)
A Astronomical twilight (-18 < sun's altitude < -12 degrees)
m Moon is in the sky, less than 50% illuminated
M Moon is in the sky, more than 50% illuminated
l Object transiting in front of moon
L Object occulted by moon
a Below altitude/horizon limits set for the observing site
d Outside declination limits for your site/mount
e Outside elongation limits for your site/mount
h Outside hour angle limits for your site/mount
g Some galactic confusion
G Lots of galactic confusion
B Object is below the horizon
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.
Three-letter constellation abbreviations specify the constellation
containing that RA/dec, as defined by the IAU's 1930 delineation.