"Pseudo-MPEC" for 2010-050B = RV223A9 = Chang'e 2 hardware

Created Sat Jan 21 11:56:45 2012 using Find_Orb

A more recent pseudo-MPEC, based on further data, is available here; and one based on August 2013 observations is available here.

Note that this is the booster left over from the Chang'e 2 mission. Click here for data on the probe for this mission, which spent some months around the moon before heading out toward the Earth/Sun L2 point on 2011 June 9.

You can get customized ephemerides for this object from the Minor Planet Center's Distant Artificial Satellites Observation page; or you can copy and paste the following astrometry into Find_Orb and do it yourself. (DASO's ephemerides sometimes run out; you should notify MPC if that happens.)

MPC released the initial astrometry on a DASO, and I've since received follow-up data from several stations. Peter Birtwhistle got some data that extended the arc so that the effects of solar radiation pressure became noticeable. As a result, I was able to get orbital elements that show a close lunar flyby occurred on 2010 October 6, with perilune (periselene?) at 3:14 UT. Insertion into lunar orbit supposedly took place at 03:06 UT, so that's a good match (and was the basis on which I was able to ID this object with some degree of certainty).

Peter also commented that the object has a "2.6 mag amplitude (14.2R-16.8R) with a rotation period of 27 seconds."

The future trajectory is still a textbook example of chaos; any small variation today leads to totally different orbits a year from now. I've gotten lots of trajectories that throw the object out of the earth-moon system over the next few years, and briefly had one that indicated a likelihood of the object hitting the earth next year on 1 May. There's still a chance it'll hit the earth or moon eventually.

There was a close lunar flyby in 2011 September, adding somewhat to the orbital uncertainty. I've hopes the object will be observed again sometime soon; fresh astrometry may give us a clearer picture of the future of this object.

The orbit can also be traced right back to the time of launch, shown in the orbital elements section. The computed perigee is now above the earth's surface. That probably reflects reality, if the object first lifted into a low-earth orbit and then boosted from there. (For those orbits, I used only the data from shortly after launch. With the newer data, we're starting to see some smaller effects such as gradual changes in the area/mass ratio as the object goes around the Sun; these effects make it harder to fit the data as exactly as we might want, so the residuals start to blow up a little.)

.TLE (Two Line Element) data, of the sort suitable for satellite observing software, are available here. (An older version covering earlier dates is available here.) Be sure to read the comments at the top of the file! Use of TLEs for high-flying objects like this gets a little tricky.

I posted some comments about this object on MPML when I first identified it.

Astrometry:
2010-050B     C2010 11 13.41756 10 23 45.82 +38 54 19.4          16.0 V D0353703
2010-050B     C2010 11 13.42588 10 23 46.39 +38 50 51.1          15.8 V D0353703
2010-050B     C2010 11 13.43348 10 23 46.44 +38 47 37.6          15.9 V D0353703
2010-050B     C2010 11 13.44149 10 23 46.03 +38 44 12.0          15.9 V D0353703
2010-050B     C2010 11 13.48568 10 23 35.44 +38 24 24.8          16.1 V D0353703
2010-050B     C2010 11 13.52806 10 23 14.85 +38 03 47.1          16.3 V D0353703
2010-050B     C2010 11 13.52836 10 23 14.64 +38 03 38.0          16.3 V D0353703
2010-050B     C2010 11 13.52868 10 23 14.46 +38 03 28.4          16.3 V D0353703
2010-050B     C2010 11 13.52896 10 23 14.31 +38 03 19.5          16.0 V D0353703
2010-050B     C2010 11 13.53397 10 23 11.54 +38 00 43.3          16.2 V D0353G96
2010-050B     C2010 11 13.53453 10 23 11.22 +38 00 26.3          15.7 V D0353G96
2010-050B     C2010 11 13.53506 10 23 10.89 +38 00 09.7          16.5 V D0353G96
2010-050B     C2010 11 13.53561 10 23 10.57 +37 59 52.8          15.7 V D0353G96
2010-050B     C2010 11 13.54177 10 23 06.59 +37 56 43.0          15.9 V D0353703
2010-050B     C2010 11 13.54205 10 23 06.44 +37 56 34.9          16.2 V D0353703
2010-050B     C2010 11 13.54233 10 23 06.19 +37 56 26.1          16.1 V D0353703
2010-050B     C2010 11 13.54262 10 23 06.08 +37 56 16.4          15.8 V D0353703
2010-050B     C2010 11 13.54349 10 23 05.51 +37 55 49.3          16.2 V D0353703
2010-050B     C2010 11 13.54379 10 23 05.34 +37 55 39.9          16.1 V D0353703
2010-050B     C2010 11 13.54407 10 23 05.23 +37 55 32.0          16.5 V D0353703
2010-050B     C2010 11 13.54437 10 23 05.00 +37 55 22.1          16.6 V D0353703
2010-050B     C2010 11 13.54518 10 23 04.42 +37 54 57.1          15.8 V D0353703
2010-050B     C2010 11 13.54545 10 23 04.29 +37 54 48.2          16.4 V D0353703
2010-050B     C2010 11 13.54572 10 23 04.13 +37 54 38.9          15.5 V D0353703
2010-050B     C2010 11 13.54599 10 23 03.91 +37 54 30.0          15.9 V D0353703
2010-050B     C2010 11 14.07973010 31 20.21 +32 19 50.2          15.7 V      J75
2010-050B     C2010 11 14.08004110 31 20.31 +32 19 41.5          15.7 V      J75
2010-050B     C2010 11 14.08067410 31 20.56 +32 19 24.6          15.7 V      J75
2010-050B     C2010 11 14.08195310 31 21.04 +32 18 49.9          15.7 V      J75
2010-050B     C2010 11 14.08226710 31 21.16 +32 18 41.8          15.5 V      J75
2010-050B     C2010 11 14.08258210 31 21.31 +32 18 32.9          15.4 V      J75
2010-050B     C2010 11 14.08352310 31 21.65 +32 18 07.5          15.5 V      J75
2010-050B     C2010 11 14.08383710 31 21.76 +32 17 58.8          15.4 V      J75
2010-050B     C2010 11 14.08511710 31 22.23 +32 17 24.3          15.6 V      J75
2010-050B     C2010 11 14.08576310 31 22.45 +32 17 06.9          15.8 V      J75
2010-050B     C2010 11 14.40943 10 34 48.93 +29 11 51.2          15.7 V D0354703
2010-050B     C2010 11 14.41043 10 34 49.04 +29 11 23.2          16.3 V D0354703
2010-050B     C2010 11 14.41146 10 34 49.18 +29 10 53.9          15.8 V D0354703
2010-050B     C2010 11 14.41249 10 34 49.29 +29 10 24.9          16.4 V D0354703
2010-050B     C2010 11 14.45494 10 34 47.56 +28 49 57.3          15.9 V D0354703
2010-050B     C2010 11 14.45607 10 34 47.31 +28 49 23.9          16.0 V D0354703
2010-050B     C2010 11 14.45723 10 34 47.06 +28 48 50.0          15.9 V D0354703
2010-050B    KC2010 11 15.10000210 40 47.20 +21 54 31.4          16.2 R D0355J95
2010-050B    KC2010 11 15.10301310 40 48.01 +21 52 52.0          16.2 R D0355J95
2010-050B    KC2010 11 15.10607110 40 48.80 +21 51 10.6          16.1 R D0355J95
2010-050B    KC2010 11 15.10909810 40 49.52 +21 49 30.5          16.4 R D0355J95
2010-050B    KC2010 11 15.11275010 40 50.32 +21 47 29.1          16.1 R D0355J95
2010-050B     C2010 11 16.49750 10 53 37.35 +06 45 56.3          16.0 V D0356703
2010-050B     C2010 11 16.50451 10 53 34.51 +06 41 07.4          15.9 V D0356703
2010-050B     C2010 11 16.51152 10 53 31.45 +06 36 17.7          16.0 V D0356703
2010-050B    KC2010 11 24.75946222 50 36.42 -07 21 26.7          15.6 R D0356J95
2010-050B    KC2010 11 24.76000422 50 36.40 -07 20 35.4          15.8 R D0356J95
2010-050B    KC2010 11 24.76058322 50 36.35 -07 19 41.1          15.5 R D0356J95
2010-050B    KC2010 11 25.93344823 10 55.71 +20 40 43.1          15.9 R D0357J95
2010-050B    KC2010 11 25.93522523 10 56.40 +20 42 51.4          15.6 R D0357J95
2010-050B    KC2010 11 25.93700123 10 57.08 +20 44 59.3          15.4 R D0357J95
2010-050B    KC2010 11 25.93880623 10 57.82 +20 47 09.2          15.5 R D0357J95
2010-050B     C2010 12 02.80779 09 30 49.25 +60 57 06.5         x15.8 V D0357C42
2010-050B     C2010 12 02.82691 09 31 02.85 +60 49 11.4         x16.0 V D0357C42
2010-050B     C2010 12 02.84611 09 31 01.63 +60 49 16.6         x16.6 V D0357C42
2010-050B     C2010 12 02.86523 09 31 19.81 +60 32 41.2         x16.0 V D0357C42
2010-050B     C2011 05 01.15072 10 26 49.69 -11 15 09.1          16.0 R D0367H36
2010-050B     C2011 05 01.15339 10 26 48.95 -11 17 21.0          16.5 R D0367H36
2010-050B     C2011 05 01.15605 10 26 48.19 -11 19 34.4          16.2 R D0367H36
2010-050B     C2011 05 01.15872 10 26 47.62 -11 21 43.1          16.0 R D0367H36
2010-050B     C2011 05 01.16139 10 26 46.95 -11 23 52.8          16.2 R D0367H36
2010-050B     C2011 05 01.16405 10 26 46.26 -11 26 07.0          16.2 R D0367H36
2010-050B     C2011 05 01.16672 10 26 45.82 -11 28 16.5          15.8 R D0367H36
2010-050B     C2011 05 01.16939 10 26 45.32 -11 30 25.9          16.2 R D0367H36
2010-050B     C2011 05 01.17057 10 26 45.14 -11 31 24.1          16.0 R D0367H36
2010-050B    bC2011 05 01.89978 10 38 50.27 -22 10 07.7          16.0 R D0367J95
2010-050B    bC2011 05 01.90076 10 38 50.36 -22 10 59.0          15.9 R D0367J95
2010-050B    KC2011 05 01.90201 10 38 50.51 -22 12 02.4          16.0 R D0367J95
2010-050B     C2011 05 02.09925 10 43 34.33 -25 05 29.9          17.3 R D0367H36
2010-050B     C2011 05 02.10570 10 43 32.90 -25 11 22.4          16.6 R D0367H36
2010-050B     C2011 05 02.10671 10 43 32.68 -25 12 17.2          15.7 R D0367H36
2010-050B      2011 05 02.11770 10 42 09.11 -25 21 40.8          18.3 V      RPa
2010-050B      2011 05 02.11808 10 42 09.14 -25 21 58.4          17.4 V      RPa
2010-050B      2011 05 02.11846 10 42 09.12 -25 22 22.2          17.4 V      RPa
2010-050B      2011 05 02.11884 10 42 09.13 -25 22 39.3          17.7 V      RPa
2010-050B      2011 05 02.11922 10 42 09.08 -25 23 08.8          19.1 V      RPa
2010-050B      2011 05 02.11961 10 42 09.16 -25 23 18.5          17.5 V      RPa
2010-050B      2011 05 02.11999 10 42 09.18 -25 23 45.1          18.2 V      RPa
2010-050B      2011 05 02.12037 10 42 09.10 -25 23 58.8          17.9 V      RPa
2010-050B      2011 05 02.12075 10 42 09.19 -25 24 15.2          17.4 V      RPa
2010-050B      2011 05 02.12113 10 42 09.28 -25 24 32.7          18.7 V      RPa
2010-050B      2011 05 02.12152 10 42 09.18 -25 24 54.2          18.4 V      RPa
2010-050B      2011 05 02.12190 10 42 09.29 -25 25 11.8          19.1 V      RPa
2010-050B      2011 05 02.12228 10 42 09.22 -25 25 38.4          17.5 V      RPa
2010-050B      2011 05 02.12266 10 42 09.17 -25 25 54.3          19.6 V      RPa
2010-050B      2011 05 02.12321 10 42 09.29 -25 26 18.6          19.0 V      RPa
2010-050B      2011 05 02.12483 10 42 09.39 -25 27 37.0          19.0 V      RPa
2010-050B      2011 05 02.12523 10 42 09.44 -25 28 01.7          18.6 V      RPa
2010-050B      2011 05 02.12564 10 42 09.39 -25 28 22.2          18.5 V      RPa
2010-050B      2011 05 02.12604 10 42 09.45 -25 28 44.3          19.6 V      RPa
2010-050B      2011 05 02.12645 10 42 09.64 -25 28 59.3          18.5 V      RPa
2010-050B      2011 05 02.12685 10 42 09.57 -25 29 19.4          18.6 V      RPa
2010-050B      2011 05 02.12727 10 42 09.65 -25 29 42.6          19.0 V      RPa
2010-050B      2011 05 02.12767 10 42 09.72 -25 30 06.6          18.1 V      RPa
2010-050B      2011 05 02.12808 10 42 09.70 -25 30 23.8          18.7 V      RPa
2010-050B      2011 05 02.12847 10 42 09.63 -25 30 44.2          18.7 V      RPa
2010-050B      2011 05 02.13381 10 42 09.95 -25 35 11.1          18.5 V      RPa
2010-050B      2011 05 02.13419 10 42 10.27 -25 35 36.6          19.0 V      RPa
2010-050B      2011 05 02.13458 10 42 10.14 -25 35 55.2          17.9 V      RPa
2010-050B      2011 05 02.13495 10 42 10.18 -25 36 10.4          18.3 V      RPa
2010-050B      2011 05 02.13535 10 42 10.32 -25 36 28.1          18.2 V      RPa
2010-050B      2011 05 02.13573 10 42 10.23 -25 36 43.3          18.0 V      RPa
2010-050B      2011 05 02.13611 10 42 10.34 -25 37 06.7          17.5 V      RPa
2010-050B      2011 05 02.13649 10 42 10.51 -25 37 30.2          19.4 V      RPa
2010-050B      2011 05 02.13687 10 42 10.20 -25 37 40.0          18.1 V      RPa
2010-050B      2011 05 02.13726 10 42 10.41 -25 38 16.2          19.2 V      RPa
2010-050B      2011 05 02.13764 10 42 10.50 -25 38 20.3          20.0 V      RPa
2010-050B      2011 05 02.13802 10 42 10.63 -25 38 41.3          19.8 V      RPa
2010-050B      2011 05 02.13840 10 42 10.34 -25 39 00.6          19.6 V      RPa
2010-050B      2011 05 02.13878 10 42 10.63 -25 39 10.9          20.6 V      RPa
2010-050B      2011 05 02.13917 10 42 10.73 -25 39 37.6          19.9 V      RPa
2010-050B      2011 05 02.13955 10 42 10.92 -25 39 58.9          19.0 V      RPa
2010-050B      2011 05 02.13993 10 42 10.98 -25 40 11.8          18.5 V      RPa
2010-050B      2011 05 02.14031 10 42 11.07 -25 40 39.5          19.1 V      RPa
2010-050B      2011 05 02.14069 10 42 10.84 -25 40 54.7          18.9 V      RPa
2010-050B      2011 05 02.14108 10 42 10.82 -25 41 14.9          20.0 V      RPa
2010-050B      2011 05 02.14147 10 42 11.06 -25 41 29.1          20.2 V      RPa
2010-050B      2011 05 02.14223 10 42 11.21 -25 42 10.8          18.4 V      RPa
2010-050B      2011 05 02.14262 10 42 11.07 -25 42 32.4          18.5 V      RPa
2010-050B      2011 05 02.14300 10 42 11.10 -25 42 51.8          17.7 V      RPa
2010-050B      2011 05 02.14338 10 42 11.18 -25 43 08.7          18.5 V      RPa
2010-050B      2011 05 02.14376 10 42 11.38 -25 43 22.3          17.8 V      RPa
2010-050B      2011 05 02.14414 10 42 11.33 -25 43 49.3          17.6 V      RPa
2010-050B      2011 05 02.14453 10 42 11.41 -25 44 04.1          18.9 V      RPa
2010-050B      2011 05 02.14491 10 42 11.22 -25 44 24.6          19.9 V      RPa
2010-050B      2011 05 02.14529 10 42 11.27 -25 44 40.1          18.3 V      RPa
2010-050B      2011 05 02.14568 10 42 11.73 -25 45 00.5          18.6 V      RPa
2010-050B     C2011 05 12.44590 22 37 52.10 +19 02 40.7          16.8 V D0369703
2010-050B     C2011 05 12.44697 22 37 52.21 +19 03 33.0          16.9 V D0369703
2010-050B     C2011 05 12.45219 22 37 53.36 +19 07 49.2          16.8 V D0369703
2010-050B     C2011 05 12.45321 22 37 53.52 +19 08 41.2          16.6 V D0369703
2010-050B     C2011 05 12.45841 22 37 54.40 +19 12 56.7          16.7 V D0369703
2010-050B     C2011 05 12.45944 22 37 54.50 +19 13 45.8          17.0 V D0369703
2010-050B     C2011 05 12.46468 22 37 55.20 +19 18 03.2          16.8 V D0369703
2010-050B     C2011 05 12.46574 22 37 55.26 +19 18 52.7          16.7 V D0369703
2010-050B     C2011 05 12.47480 22 37 55.88 +19 26 17.2          16.5 V D0371703
2010-050B     C2011 05 12.47515 22 37 55.88 +19 26 33.1          16.4 V D0371703
2010-050B     C2011 05 122TjCAstrometrya]w]redacted;I9^YDq8@_6TSv(%OD+2eNEOCP703
2010-050B     C2011 05 126139tsS#Aj5]sm.rwYos5oZlaRJ2NH@$seeZvMRefRNEOCPNEOCP703
2010-050B     C2011 05 12bS#F)7V`DR0vg8GXiO(,eg_aQP8;XsbgC.r\eO#YJN\gC1kNEOCP703
2010-050B    KC2011 05 21.08781207 30 36.55 +65 35 33.9          17.4 R D0369J95
2010-050B    KC2011 05 21.09209107 30 59.31 +65 33 26.6          17.2 R D0369J95
2010-050B    KC2011 05 21.09665607 31 23.59 +65 31 12.7          17.0 R D0369J95
2010-050B    KC2011 05 24.89981209 23 09.99 +31 58 09.1          16.8 R D0371J95
2010-050B    KC2011 05 24.90075909 23 10.51 +31 57 28.7          17.1 R D0371J95
2010-050B    KC2011 05 24.90170009 23 10.99 +31 56 47.7          17.5 R D0371J95
2010-050B    KC2011 05 24.90264809 23 11.51 +31 56 06.6          17.1 R D0371J95
2010-050B    KC2011 05 24.90410409 23 12.33 +31 55 04.0          17.0 R D0371J95

Station data:
(703) Catalina Sky Survey (N32.41712 W110.73264).   Observers R. A. Kowalski,
    E. J. Christensen, A. R. Gibbs, A.Odell.  Measurers E. C. Beshore, E. J.
    Christensen, G. J. Garradd, A. D. Grauer, R. E. Hill, R. A. Kowalski, S. M.
    Larson, R. H. McNaught, A. R. Gibbs, J. D. Ahern, A. Boattini.  0.68-m
    Schmidt + CCD.
(C42) Xingming Observatory, Mt. Nanshan (N43.4711 E87.1778).
(G96) Mt. Lemmon Survey (N32.44287 W110.78872).   Observers E. J. Christensen,
    A. R. Gibbs, R. A. Kowalski.  Measurers E. C. Beshore, E. J. Christensen,
    G. J. Garradd, A. R. Gibbs, A. D. Grauer, R. E. Hill, R. A. Kowalski, S. M.
    Larson, R. H. McNaught, R. H., J. D. Ahern, A. Boattini.  1.5-m reflector +
    CCD.
(H36) Sandlot Observatory, Scranton (N38.7977 W95.7064).   Observer G. Hug.
    0.56-m reflector + CCD.
(J75) OAM Observatory, La Sagra (N37.98249 W2.56529).   Observers S. Sanchez,
    J. Nomen, R. Stoss, A. Cikota, S. Cikota, J. Rodriguez, W. K. Y. Yeung, M.
    Hurtado, J. A. Jaume.  0.45-m f/2.8 reflector + CCD.
(J95) Great Shefford (N51.47502 W1.44700).   Observer P. Birtwhistle.  0.40-m
    f/6.0 Schmidt-Cassegrain + CCD.
(RPa) Ralph Pass (N43.6666 W71.0000).  0.3-m f/10 SCT + CCD.

Orbital elements:
2010-050B = RV223A9 = Chang'e 2 hardware
   Perigee 2011 Jun 2.506329 TT = 12:09:06 (JD 2455715.006329)
Epoch 2011 May 22.0 TT; AMR 0.020402 m2/kg             Find_Orb
M 208.2398104            (2000.0)            P               Q
n  13.1892796106   Peri.  276.9416501   -0.0183836923    0.8870704266
a382932.99492km    Node   331.4434997    0.1180619589   -0.4561922860
e   0.181584306    Incl.   74.7843628   -0.9928360456   -0.0706728820
P  27.29d          H   27.4     U  5.5     q 313398.37266km  Q 452467.61718km
From 149 observations 2010 Nov. 13-2011 May 24; mean residual 8".345.
1 00000U          11142.00000000  .00000000  00000-0  00000-0 0    02
2 00000  74.7857 331.6027 1781574 276.4409 208.7509  0.03637721    07

Orbital elements (lunar flyby): 
2010-050B = RV223A9 = Chang'e 2 hardware
   Perilune 2010 Oct 6.134890 TT =  3:14:14 (JD 2455475.634890)
Epoch 2010 Oct  6.13 TT; AMR 0.012995 m^2/kg            Find_Orb
q  4533.87316km     (2000.0)            P               Q
H   25.7  G 0.15   Peri.  110.61766     -0.21406528     -0.35263508
                   Node   255.24594      0.03510254     -0.93473921
e   1.8692476      Incl.  109.60861      0.97618843     -0.04371615
From 57 observations 2010 Nov. 13-25; mean residual 0".328.

Orbital elements (near launch): 
2010-050B = RV223A9 = Chang'e 2 hardware
   Perigee 2010 Oct 1.503161 TT = 12:04:33 (JD 2455471.003161)
Epoch 2010 Oct  1.5 TT; AMR 0.012988 m^2/kg             Find_Orb
M 359.87948              (2000.0)            P               Q
n  38.12952363     Peri.  179.29980      0.98550029      0.14948470
a188695.952km      Node   170.84209     -0.15802150      0.98090695
e   0.9652636      Incl.   30.28865     -0.06179294     -0.12440205
P   9.44d          H   25.7     G   0.15   q 6554.60738km  Q 370837.298km
From 57 observations 2010 Nov. 13-25; mean residual 0".328.

Residuals in arcseconds:
101113 703  1.4- 10.5+    101124 J95  4.3+ 30.9+    110502 RPa  .21+  2.8-
101113 703  1.4- 11.0+    101124 J95  4.1+ 30.6+    110502 RPa  2.1-  1.9-
101113 703  1.3- 10.4+    101125 J95  8.5- 31.4-    110502 RPa  2.0-  1.4+
101113 703  .98- 10.4+    101125 J95  8.3- 31.6-    110502 RPa  .70-  3.7+
101113 703  1.5- 10.0+    101125 J95  8.6- 31.9-    110502 RPa  2.5-  7.5+
101113 703  1.3-  9.2+    101125 J95  8.5- 32.2-    110502 RPa  1.5-  3.0+
101113 703  1.7-  9.2+    101202 C42( 9.5- 36.1+)   110502 RPa  .23+  1.5-
101113 703  1.7-  9.4+    101202 C42( 6.8- 23.7+)   110502 RPa  4.5-  7.7+
101113 703  1.5-  9.0+    101202 C42(87.1-  515+)   110502 RPa  2.3-  9.1-
101113 G96  1.5-  8.5+    101202 C42( 2.7- 26.6+)   110502 RPa  1.7-  5.8+
101113 G96  1.3-  8.8+    110501 H36  .23-  5.5-    110502 RPa  .49-  3.7+
101113 G96  1.5-  8.6+    110501 H36  1.1-  6.0-    110502 RPa  5.0-  3.4+
101113 G96  1.3-  8.7+    110501 H36  2.6-  8.5-    110502 RPa  1.7- 12.0+
101113 703  1.5-  8.8+    110501 H36  1.6-  6.0-    110502 RPa  1.0-  4.7+
101113 703  1.2-  9.4+    110501 H36  2.4-  4.7-    110502 RPa  .94+  2.3+
101113 703  2.1-  9.4+    110501 H36  3.8-  8.4-    110502 RPa  1.1+  8.4+
101113 703  1.3-  8.8+    110501 H36  1.9-  7.2-    110502 RPa  1.7+  .42-
101113 703  1.6-  9.1+    110501 H36  1.2-  5.9-    110502 RPa  2.1-  3.3+
101113 703  1.3-  9.1+    110501 H36  .40-  6.4-    110502 RPa  3.1-  2.5+
101113 703  .56- 10.0+    110501 J95  2.1-  .76-    110502 RPa  .53-  7.7+
101113 703  1.0-  9.6+    110501 J95  1.8-  1.8-    110502 RPa  .10+  3.8+
101113 703  1.9- 10.1+    110501 J95  1.1-  1.0-    110502 RPa  2.5-  1.5+
101113 703  1.4-  9.7+    110502 H36  3.7-  .64+    110502 RPa  2.8-  1.0+
101113 703  1.3-  9.0+    110502 H36  2.6-  .45-    110502 RPa  2.5-  3.0+
101113 703  1.8-  8.6+    110502 H36  2.3-  .40-    110502 RPa  .54-  8.3+
101114 J75  1.0+  1.6+    110502 RPa  2.0-  3.2+    110502 RPa  2.0-  .12+
101114 J75  .74+  1.3+    110502 RPa  1.7-  4.9+    110502 RPa  1.7-  4.7+
101114 J75  .77+  1.5+    110502 RPa  2.1-  .29+    110502 RPa  5.0-  3.0+
101114 J75  .63+  1.4+    110502 RPa  2.1-  2.4+    110502 RPa  5.1-  6.4+
101114 J75  .64+  1.8+    110502 RPa  2.9-  7.9-    110502 RPa  .28+  5.3+
101114 J75  1.0+  1.4+    110502 RPa  2.0-  2.2+    110512 703  2.2+  .60-
101114 J75  .94+  1.5+    110502 RPa  1.9-  5.2-    110512 703  .34+  .96-
101114 J75  .88+  1.3+    110502 RPa  3.2-  .29+    110512 703  1.5+  1.4-
101114 J75  1.0+  1.5+    110502 RPa  2.2-  3.1+    110512 703  1.1+  .49+
101114 J75  .90+  1.7+    110502 RPa  1.2-  4.8+    110512 703  1.7+  .87+
101114 703  1.8+  3.5-    110502 RPa  2.7-  3.0+    110512 703  1.0+  .50-
101114 703  1.5+  3.3-    110502 RPa  1.4-  4.6+    110512 703  2.0+  .45+
101114 703  1.6+  3.5-    110502 RPa  2.6-  2.9-    110512 703  1.3+  1.9-
101114 703  1.5+  3.4-    110502 RPa  3.5-  .42+    110512 703  1.4+  .75+
101114 703  2.1+  4.0-    110502 RPa  2.2-  3.9+    110512 703  1.2+  .38-
101114 703  1.7+  3.9-    110502 RPa  2.0-  7.1+    110512 703  1.1+  .32-
101114 703  1.5+  3.4-    110502 RPa  1.7-  2.5+    110512 703  2.0+  .26+
101115 J95  4.2+ 14.7-    110502 RPa  2.7-  2.7+    110512 703  1.3+  .00
101115 J95  4.1+ 14.6-    110502 RPa  2.2-  .71+    110521 J95 13.6+ 19.8-
101115 J95  4.3+ 14.9-    110502 RPa  .07+  6.3+    110521 J95 13.4+ 20.0-
101115 J95  4.3+ 14.7-    110502 RPa  1.2-  6.4+    110521 J95 13.1+ 19.4-
101115 J95  4.2+ 14.9-    110502 RPa  .51-  4.3+    110524 J95  3.7-  7.2-
101116 703  9.2+ 43.6-    110502 RPa  .08+  .38+    110524 J95  3.4-  6.7-
101116 703  9.2+ 43.4-    110502 RPa  .58-  3.8+    110524 J95  3.6-  7.1-
101116 703  9.4+ 43.1-    110502 RPa  1.9-  3.0+    110524 J95  3.5-  7.2-
101124 J95  4.1+ 30.7+    110502 RPa  3.6-  3.7+    110524 J95  3.1-  6.9-

Ephemerides (500):
Date (UT)    RA              Dec         delta   r     elong mag  '/hr    PA
---- -- --  ------------   ------------  ------ ------ ----- ---  ------ ------
2012 01 20  15 04 40.241   -74 22 21.41  378651 .98296  66.5 18.8  32.16  89.3
2012 01 21  17 47 57.857   -69 29 39.51  368032 .98260  53.8 19.?  34.13  50.2
2012 01 22  19 12 18.427   -58 35 34.17  356031 .98233  40.3 21.?  36.63  31.0
2012 01 23  19 56 15.000   -44 54 25.00  343598 .98217  25.6 23.?  39.65  22.1
2012 01 24  20 24 20.870   -29 19 18.63  332268 .98214   9.9 31.?  43.14  17.7
2012 01 25  20 46 36.817   -12 09 48.07  324905 .98229   8.6 32.?  46.15  16.4
2012 01 26  21 08 11.833   +05 39 43.82  324139 .98259  26.3 23.?  46.49  17.2
2012 01 27  21 31 47.852   +23 04 15.20  329466 .98306  44.0 20.?  44.84  19.2
2012 01 28  22 01 15.511   +39 19 24.41  339517 .98365  60.9 18.9  42.10  23.3
2012 01 29  22 44 29.232   +53 46 38.44  352814 .98432  76.6 18.0  38.92  31.4
2012 01 30  23 59 48.994   +65 25 41.86  367934 .98503  90.9 17.5  35.76  47.8
2012 01 31  02 16 24.266   +71 45 08.31  383675 .98574 104.1 17.1  32.90  79.8
2012 02 01  04 51 21.106   +69 50 38.54  399121 .98642 116.1 16.8  30.44 116.6
2012 02 02  06 24 31.784   +62 34 34.93  413615 .98705 127.2 16.5  28.40 138.0
2012 02 03  07 14 18.578   +53 40 57.72  426698 .98762 137.5 16.3  26.75 148.8
2012 02 04  07 44 27.841   +44 28 49.17  438046 .98811 147.0 16.1  25.46 154.7
2012 02 05  08 05 08.896   +35 19 10.70  447380 .98853 155.8 15.9  24.49 158.4
2012 02 06  08 20 37.907   +26 14 54.60  454285 .98887 163.6 15.7  23.88 161.3
2012 02 07  08 32 51.260   +17 09 53.94  457399 .98911 168.7 15.5  23.81 163.8
2012 02 08  08 43 49.803   +07 56 22.78  454267 .98925 167.8 15.5  24.27 163.4
2012 02 09  08 55 25.310   -01 28 46.45  446885 .98928 161.7 15.7  25.05 162.5
2012 02 10  09 08 06.710   -11 12 13.98  437367 .98924 153.5 15.9  26.10 161.6
2012 02 11  09 22 39.127   -21 18 56.51  426396 .98912 144.2 16.1  27.41 160.3
2012 02 12  09 40 30.805   -31 51 22.91  414371 .98892 134.1 16.4  28.97 158.1
2012 02 13  10 04 39.011   -42 47 54.58  401677 .98866 123.3 16.6  30.77 154.4
2012 02 14  10 41 49.745   -53 55 49.06  388771 .98834 111.7 16.9  32.79 147.4
2012 02 15  11 49 53.147   -64 25 12.49  376218 .98799  99.3 17.2  34.98 132.7
2012 02 16  14 08 22.723   -71 09 47.99  364712 .98762  86.2 17.7  37.23 100.4
2012 02 17  17 05 33.901   -68 08 59.58  355078 .98727  72.4 18.3  39.34  58.5
2012 02 18  18 48 12.753   -56 54 52.88  348225 .98697  58.2 19.?  41.06  35.5