"Pseudo-MPEC" for 2010-050A = NORAD 37174 = Chang'e-2
Created 2026 Aug 25 20:50:17 UT using Find_Orb
Click here for an explanation of pseudo-MPECs
4 observations match in date and observatory code, but not in other regards. They will be ignored.
Astrometry:
2010-050A C2011 09 17.85403 22 34 22.03 -04 31 00.2 18.5 V D0380J75
2010-050A C2011 09 17.86462 22 34 20.28 -04 31 08.7 18.3 V D0380J75
2010-050A C2011 09 17.87519 22 34 18.46 -04 31 18.1 18.5 V D0380J75
2010-050A C2011 09 18.19649 22 34 28.59 -04 34 15.0 18.9 V D0380703
2010-050A C2011 09 18.20341 22 34 27.15 -04 34 19.5 18.8 V D0380703
2010-050A C2011 09 18.21030 22 34 25.68 -04 34 25.4 18.4 V D0380703
2010-050A C2011 09 18.21705 22 34 24.27 -04 34 31.7 18.6 V D0380703
2010-050A C2011 11 16.21612 02 09 27.82 +00 50 06.5 18.6 V D0387703
2010-050A C2011 11 16.22116 02 09 28.44 +00 50 16.9 x19.0 V D0387703
2010-050A C2011 11 16.22628 02 09 29.12 +00 50 29.9 18.4 V D0387703
2010-050A C2011 11 16.23137 02 09 29.70 +00 50 43.1 18.6 V D0387703
2010-050A C2011 11 16.25494 02 09 30.74 +00 51 46.6 18.7 R D0387G48
2010-050A C2011 11 16.25672 02 09 30.97 +00 51 50.0 Duplicat!18.5 R D0387G48
2010-050A C2011 11 16.25672 02 09 31.05 +00 51 49.9 Duplicat!18.8 R D0387G48
2010-050A C2011 11 16.25851 02 09 31.25 +00 51 54.2 18.4 R D0387G48
2010-050A |C2011 11 16.26177 02 09 28.20 +00 51 46.2 18.5 V D0387H06
2010-050A |C2011 11 16.26478 02 09 28.61 +00 51 52.7 18.4 V D0387H06
2010-050A C2011 11 16.26530 02 09 32.08 +00 52 09.8 Duplicate18.8 R D0387G48
2010-050A C2011 11 16.26530 02 09 32.08 +00 52 10.0 Duplicate18.7 R D0387G48
2010-050A C2011 11 16.26703 02 09 32.31 +00 52 14.1 Duplicate18.6 R D0387G48
2010-050A C2011 11 16.26703 02 09 32.33 +00 52 14.3 Duplicate18.9 R D0387G48
2010-050A |C2011 11 16.26779 02 09 29.03 +00 51 59.9 18.3 V D0387H06
2010-050A C2011 11 16.26876 02 09 32.50 +00 52 18.2 Duplicate18.7 R D0387G48
2010-050A C2011 11 16.26876 02 09 32.52 +00 52 18.3 Duplicate18.9 R D0387G48
2010-050A C2011 11 16.27049 02 09 32.71 +00 52 22.2 19.3 R D0387G48
2010-050A C2011 11 16.28916 02 09 37.16 +00 52 59.2 18.6 R D0387854
2010-050A C2011 11 16.29078 02 09 37.37 +00 53 03.7 18.6 R D0387854
2010-050A C2011 11 16.29240 02 09 37.64 +00 53 07.9 18.5 R D0387854
2010-050A HC2011 11 16.39713 02 09 58.79 +00 57 12.8 D0387291
2010-050A HC2011 11 16.39857 02 09 59.19 +00 57 16.3 D0387291
2010-050A HC2011 11 16.40000 02 09 59.56 +00 57 19.1 D0387291
2010-050A C2011 11 16.48186 02 11 56.61 +00 59 51.4 18.4 V D0387900
2010-050A C2011 11 16.49612 02 11 59.14 +01 00 24.9 18.4 V D0387900
2010-050A C2011 11 16.51039 02 12 01.41 +01 00 58.8 18.5 V D0387900
K11W00E C2011 11 16.62003 02 12 19.57 +01 05 25.4 x18.4 RoEQ047300
K11W00E C2011 11 16.62095 02 12 19.67 +01 05 27.5 18.4 RoEQ047300
K11W00E C2011 11 16.62465 02 12 20.26 +01 05 35.8 18.5 RoEQ047300
K11W00E C2011 11 16.62740 02 12 20.65 +01 05 41.5 18.4 RoEQ047300
K11W00E C2011 11 16.63016 02 12 21.14 +01 05 48.9 18.5 RoEQ047300
K11W00E C2011 11 16.63293 02 12 21.56 +01 05 55.4 18.4 RoEQ047300
2010-050A KC2011 11 16.82276002 14 44.85 +01 09 42.7 18.7 V D0388510
2010-050A KC2011 11 16.82434 02 14 47.32 +01 10 50.2 tD0387204
2010-050A KC2011 11 16.83066 02 14 48.84 +01 11 05.7 18.1 RtD0387204
2010-050A KC2011 11 16.83592202 14 48.37 +01 10 14.6 19.0 V D0388510
2010-050A KC2011 11 16.83727 02 14 50.38 +01 11 21.7 tD0387204
K11W00E KC2011 11 16.84452 02 14 51.08 +01 12 03.7 18.3 Ru~0aUM104
2010-050A KC2011 11 16.84832 02 14 51.91 +01 12 16.4 17.6 R D0388160
K11W00E KC2011 11 16.84855 02 14 51.91 +01 12 13.6 18.0 Ru~0aUM104
2010-050A KC2011 11 16.84908402 14 51.71 +01 10 47.0 18.2 V D0388510
2010-050A KC2011 11 16.85108 02 14 52.45 +01 12 22.9 18.3 R D0388160
2010-050A KC2011 11 16.85385 02 14 53.00 +01 12 29.2 18.5 R D0388160
2010-050A KC2011 11 16.85660 02 14 53.56 +01 12 36.1 18.6 R D0388160
K11W00E KC2011 11 16.85661 02 14 53.55 +01 12 33.1 18.6 Ru~0aUM104
2010-050A C2011 11 22.21225 03 02 29.14 +05 08 02.8 17.8 V D0392703
2010-050A C2011 11 22.21905 03 02 30.37 +05 08 23.2 17.7 V D0392703
2010-050A C2011 11 22.22596 03 02 31.63 +05 08 43.0 17.7 V D0392703
2010-050A C2011 11 22.23282 03 02 32.85 +05 09 03.6 18.0 V D0392703
2010-050A C2011 12 02.02377 04 41 54.81 +13 06 50.9 D0396J43
2010-050A C2011 12 02.03867 04 41 58.20 +13 07 31.3 D0396J43
2010-050A C2011 12 02.05352 04 42 01.66 +13 08 10.0 D0396J43
2010-050A C2011 12 02.06836 04 42 05.21 +13 08 46.3 D0396J43
2010-050A C2011 12 20.17348 07 48 08.98 +21 34 29.1 18.8 R J04
2010-050A C2011 12 20.19404 07 48 11.66 +21 34 25.3 18.8 R J04
2010-050A C2011 12 20.21459 07 48 14.78 +21 34 16.7 18.8 R J04
2010-050A C2011 12 20.23515 07 48 18.46 +21 34 03.3 18.9 R J04
2010-050A C2011 12 24.38155 08 21 51.15 +22 02 09.7 19.6 V D0400703
2010-050A C2011 12 24.39002 08 21 51.66 +22 02 13.4 18.8 V D0400703
2010-050A C2011 12 24.39862 08 21 52.20 +22 02 16.7 19.0 V D0400703
2010-050A C2011 12 24.40719 08 21 52.77 +22 02 18.2 18.8 V D0400703
2010-050A KC2011 12 24.42770108 21 34.91 +21 59 39.9 18.7 V D0400H21
2010-050A KC2011 12 24.43028108 21 35.32 +21 59 38.0 18.8 V D0400H21
2010-050A KC2011 12 24.43544508 21 36.13 +21 59 34.1 18.7 V D0400H21
2010-050A KC2011 12 24.43967908 21 36.83 +21 59 30.9 18.8 V D0400H21
2010-050A KC2011 12 24.44228908 21 37.26 +21 59 28.7 18.9 V D0400H21
2010-050A KC2011 12 24.46113408 21 45.98 +21 59 47.7 18.1 R D0400H36
2010-050A KC2011 12 24.47246608 21 47.88 +21 59 37.5 18.5 R D0400H36
2010-050A KC2011 12 24.47799308 21 48.99 +21 59 31.8 17.8 R D0400H36
2010-050A C2011 12 24.50817 08 22 02.28 +22 01 34.0 19.6 V D0400G96
2010-050A C2011 12 24.51050 08 22 02.64 +22 01 31.8 19.6 V D0400G96
2010-050A C2011 12 24.51282 08 22 03.00 +22 01 29.4 19.1 V D0400G96
2010-050A C2011 12 24.51512 08 22 03.32 +22 01 27.2 18.9 V D0400G96
2010-050A C2011 12 24.54825 08 22 09.48 +22 00 47.8 19.7 V D0400G96
2010-050A C2011 12 24.54882 08 22 09.62 +22 00 47.0 19.6 V D0400G96
2010-050A C2011 12 24.54940 08 22 09.76 +22 00 46.2 19.6 V D0400G96
2010-050A C2011 12 24.54998 08 22 09.87 +22 00 45.6 19.3 V D0400G96
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.
(160) Castelmartini (N43.823058 E10.841440) Italy. Observers M. Jaeger, E.
Prosperi, S. Prosperi. Measurer E. Prosperi. 0.36-m f/10.2
Schmidt-Cassegrain + CCD.
(204) Schiaparelli Observatory (N45.868292 E8.769720) Italy. Observer L.
Buzzi. 0.60-m f/4.64 reflector + CCD.
(291) LPL/Spacewatch II (N31.961669 W111.599905) US/Arizona. Observers J.
V. Scotti, R. S. McMillan. 1.8-m f/2.7 reflector + CCD.
(300) Bisei Spaceguard Center-BATTeRS (N34.671957 E133.544440) Japan. 1.0-m
f/3.0 reflector + CCD.
(510) Siegen (N50.910283 E8.025600) Germany.
(703) Catalina Sky Survey (N32.417029 W110.732640)
US/Arizona. 0.68 m Schmidt + 4K CCD.
(854) Sabino Canyon Observatory, Tucson (N32.299849 W110.820050) US/Arizona.
Observer J. E. McGaha. 0.36-m f/10.0 Schmidt-Cassegrain + CCD.
(900) Moriyama (N35.049753 E135.989940) Japan. Observer Y. Ikari. 0.26-m
f/7.0 reflector + CCD.
(G48) Harlingten Research Observatory, Rancho Hildalgo (N31.946918
W108.898520) US/New Mexico.
(G96) Mt. Lemmon Survey (N32.442729 W110.788720)
US/Arizona. 1.5-m reflector + 4K CCD.
(H06) RAS Observatory, Mayhill (N32.903322 W105.528700) US/New
Mexico. Observer H. Sato. 0.10-m f/5.0 astrograph + CCD.
(H21) Astronomical Research Observatory, Westfield (N39.483054 W87.968270)
US/Illinois. Observer R. Holmes. Measurers S. Foglia, L. Buzzi, T.
Linder, R. Holmes. 0.40-m f/5.32 astrograph + CCD.
(H36) Sandlot Observatory, Scranton (N38.797700 W95.706554) US/Kansas.
Observer G. Hug. 0.56-m reflector + CCD.
(J04) ESA Optical Ground Station, Tenerife (N28.300971 W16.511823) Canary
Islands (Spain). Observer D. Abreu. Measurers M. Micheli, D. Koschny, E.
Schwab, M. Busch, A. Knöfel. 1.0-m f/4.4 reflector + CCD.
(J43) Oukaïmeden Observatory, Marrakech (N31.206437 W7.866460) Morocco.
Observer C. Rinner. Measurers C. Rinner, M. Ory. 0.5-m f/3 reflector + CCD.
(J75) OAM Observatory, La Sagra (N37.982399 W2.565290) Spain. Observers S.
Sanchez, J. Nomen, M. Hurtado, J. A. Jaume, W. K. Y. Yeung, F. Serra, T.
Valls, I. Mas, J. Marcus. 0.36-m f/2 reflector + CCD.
Orbital elements: 2010-050A = NORAD 37174 = Chang'e-2
Perihelion 2011 Dec 25.85195 +/- 0.00055678 TT; Constraint: A=0.024
dx: -1.329 +/- 0.014593 dy: -2.8936 +/- 0.021771
dz: 0.02139 +/- 0.0059562 m/s T0: 2011 Nov 30.960 +/- 0.0551
Epoch 2011 Dec 24.0 TT = JDT 2455919.5 Earth MOID: 0.0077 Gray
M 358.30572613 +/- 0.0005124 (J2000.0)
n 0.91485994 +/- 1.7822e-6 Peri. 6.51939 +/- 0.0005357
a 1.05091189 +/- 1.3648e-6 Node 87.27863 +/- 0.0000807
e 0.0566993 +/- 1.0596e-6 Incl. 0.24525 +/- 4.1109e-6
P 1.077/393.495d H 27.96 G 0.15 U 3.9
q 0.99132582 +/- 1.7766e-7 Q 1.11049796 +/- 2.5554e-6
83 of 85 observations 2011 Sept. 17-Dec. 24; mean residual 0".458/0.95 sigmas
Residuals in arcseconds: 110917 J75 .144+ .542- 111116 291 .065+ .027+ 111202 J43 .175- .231- 110917 J75 .096- .360+ 111116 291 .398- .422- 111202 J43 .018+ .046+ 110917 J75 .056+ .172+ 111116 900 .634- .671+ 111202 J43 .134- .117- 110918 703 .765- .306- 111116 900 .220+ .143- 111220 J04 .022- .217+ 110918 703 .451- .948+ 111116 900 .099- .488- 111220 J04 .059+ .095+ 110918 703 .270- .687+ 111116 300(1.60+ .453+) 111220 J04 .079+ .218+ 110918 703 .705+ .177- 111116 300 .958+ .402+ 111220 J04 .042- .243+ 111116 703 .249- .351- 111116 300 1.08+ .057+ 111224 703 .401+ .289- 111116 703(.654- 1.82-) 111116 300 .330+ .664- 111224 703 .165- .207- 111116 703 .176- .874- 111116 300 .963+ .297+ 111224 703 .280- .327+ 111116 703 1.03- .359+ 111116 300 .420+ .339+ 111224 703 .071+ .017- 111116 G48 .203- 1.17+ 111116 510 .274- .628- 111224 H21 .286- .269- 111116 G48 .041- .418+ 111116 204 .072- .181- 111224 H21 .074- .295- 111116 G48 1.16+ .318+ 111116 204 986µ- .104- 111224 H21 .135- .258- 111116 G48 .839+ .439+ 111116 510 .229+ .764- 111224 H21 .032- .049- 111116 H06 .739- .059+ 111116 204 .043- .217- 111224 H21 .151- .067- 111116 H06 .594- .444- 111116 104 .278+ .180- 111224 H36 .408+ .391+ 111116 G48 .567+ .201+ 111116 160 .166+ .112- 111224 H36 .107- .226+ 111116 G48 .567+ .401+ 111116 104 .109+ .076- 111224 H36 1.28+ .179- 111116 G48 .737+ .470+ 111116 510 .263+ .335- 111224 G96 .322- .149- 111116 G48 1.04+ .670+ 111116 160 .225- .318- 111224 G96 .141- .040- 111116 H06 .367- .242- 111116 160 .415- .743- 111224 G96 .054- .090- 111116 G48 .288+ .539+ 111116 160 .315- .516- 111224 G96 .593- .089+ 111116 G48 .588+ .639+ 111116 104 8.8m+ .144- 111224 G96 .433- 2.6m- 111116 G48 .121+ .511+ 111122 703 .326+ 1.07+ 111224 G96 .196- .050- 111116 854 .251- .529- 111122 703 .142- 1.35+ 111224 G96 2.0m+ .083- 111116 854 .443- .210+ 111122 703 .041+ .851+ 111224 G96 .226- .087+ 111116 854 .239+ .651+ 111122 703 .195+ 1.45+ 111116 291 .060+ .200- 111202 J43 .080- .108- Ephemerides (geocentric): Date (UTC) RA Dec delta r elong SM mag LuElo Con " sig PA ---- ----- ------------ ------------ ------ ------ ----- -- --- ----- --- -------- 2011 11 11 01 28 49.380 -02 04 55.29 .00884 0.9978 149.9 M 19.0 32.5 Cet .277 91 2011 11 12 01 36 09.826 -01 32 39.25 .00874 0.9976 150.7 M 18.9 41.6 Cet .231 91 2011 11 13 01 43 42.239 -00 58 55.92 .00865 0.9973 151.6 M 18.9 51.0 Cet .184 91 2011 11 14 01 51 26.514 -00 23 46.00 .00856 0.9971 152.5 M 18.8 60.7 Cet .137 90 2011 11 15 01 59 22.520 +00 12 49.62 .00847 0.9969 153.4 M 18.8 70.6 Cet .089 89 2011 11 16 02 07 30.109 +00 50 49.85 .00838 0.9966 154.4 18.7 80.7 Cet .041 84 2011 11 17 02 15 49.112 +01 30 13.30 .00830 0.9964 155.4 18.7 90.9 Cet .010 138 2011 11 18 02 24 19.355 +02 10 58.26 .00822 0.9962 156.5 18.6 101.5 Cet .054 102 2011 11 19 02 33 00.660 +02 53 02.59 .00814 0.9960 157.6 18.6 112.2 Cet .099 100 2011 11 20 02 41 52.866 +03 36 23.58 .00806 0.9958 158.8 18.5 123.3 Cet .141 100 2011 11 21 02 50 55.834 +04 20 57.79 .00799 0.9955 160.0 18.5 134.5 Cet .181 100 2011 11 22 03 00 09.467 +05 06 40.86 .00793 0.9953 161.2 18.4 145.8 Cet .216 101 2011 11 23 03 09 33.705 +05 53 27.16 .00787 0.9951 162.4 18.3 156.5 Cet .248 102 2011 11 24 03 19 08.520 +06 41 09.49 .00782 0.9950 163.6 18.3 165.0 Cet .274 104 2011 11 25 03 28 53.878 +07 29 38.75 .00777 0.9948 164.8 18.2 165.8 Tau .295 107 2011 11 26 03 38 49.687 +08 18 43.79 .00773 0.9946 166.0 18.2 158.1 Tau .309 109 2011 11 27 03 48 55.741 +09 08 11.38 .00770 0.9944 167.2 18.1 147.9 Tau .318 113 2011 11 28 03 59 11.666 +09 57 46.49 .00767 0.9942 168.3 18.1 137.2 Tau .320 118 2011 11 29 04 09 36.890 +10 47 12.72 .00766 0.9941 169.3 18.0 126.6 Tau .317 124 2011 11 30 04 20 10.629 +11 36 12.83 .00765 0.9939 170.1 18.0 116.4 Tau .310 132