(307261) 2002 MS4 Precovery Images
(307261) 2002 MS4 Precovery Images
The original elements for 2002 MS4 were already quite accurate (5 oppositions from 2002 to 2007), so the identification of additional
images from DSS was straightforward. Eventually, 2002 MS4 was found on seven plates at five oppositions going back to 1954.
The following astrometry was submitted to the Minor Planet Center:
K02M04S 1954 04 08.37535 14 15 39.35 -13 39 52.5 261
K02M04S 1955 04 16.32917 14 19 36.64 -13 38 22.7 261
K02M04S 1982 08 09.38380 16 09 39.06 -12 20 00.8 260
K02M04S 1983 06 14.54428 16 16 21.79 -12 16 28.0 260
K02M04S 1983 07 01.46809 16 15 17.21 -12 14 19.9 260
K02M04S 1983 07 10.49060 16 14 47.94 -12 13 44.0 260
K02M04S 1992 06 23.57704 16 53 16.75 -11 13 38.2 260
At the end of this page are the elements and residuals before and with the new data. The new orbit is much more accurate because the object
has now been observed for 53 years instead of five years. 2002 MS4 was numbered on 2011-12-10.
View the Discovery Announcement .
1992 June 23.57704 UTC RA 16h53m16.75s Dec. -11°13'38.2"
60-minute exposure
Size = 150" x 150"
Siding Spring Observatory-DSS plate ER729-A2JL
1983 July 10.49060 UTC RA 16h14m47.94s Dec. -12°13'44.0"
60-minute exposure
Size = 255" x 255"
Siding Spring Observatory-DSS plate S655-03YK
1983 July 01.46809 UTC RA 16h15m17.21s Dec. -12°14'19.9"
60-minute exposure
Size = 255" x 255"
Siding Spring Observatory-DSS plate S656-02C3
1983 June 14.54428 UTC RA 16h16m21.79s Dec. -12°16'28.0"
60-minute exposure
Size = 255" x 255"
Siding Spring Observatory-DSS plate S728-00TR
1982 Aug. 09.38380 UTC RA 16h09m39.06s Dec. -12°20'00.8"
60-minute exposure
Size = 255" x 255"
Siding Spring Observatory-DSS plate S727-044C
1955 Apr. 16.32917 UTC RA 14h19m36.64s Dec. -13°38'22.7"
50-minute exposure
Size = 255" x 255"
Palomar Mountain-DSS plate se0742
1954 Apr. 08.37535 UTC RA 14h15m39.35s Dec. -13°39'52.5"
45-minute exposure
Size = 255" x 255"
Palomar Mountain-DSS plate se0741
Original elements and residuals from the Minor Planet Center
2002 MS4
Epoch 2007 Oct. 27.0 TT = JDT 2454400.5 MPC
M 206.52699 (2000.0) P Q
n 0.00362578 Peri. 214.30560 +0.35287492 -0.91851046 T = 2496728.80112 JDT
a 41.9632011 Node 215.98521 +0.91204522 +0.38022592 q = 36.1204406
e 0.1392353 Incl. 17.67266 +0.20893255 -0.10847485
P 272 H 3.7 G 0.15 U 5
From 27 observations at 5 oppositions, 2002-2007, mean residual 0".47.
Residuals
20020618 644 0.5+ 1.6- 20030621 621 0.2+ 0.0 20040526 304 0.2- 0.2+
20020618 644 0.2- 1.0- 20030621 621 0.6+ 0.4- 20040710 621 0.1- 0.1+
20020618 644 0.4- 0.9- 20030621 621 0.4+ 0.2+ 20040713 621 0.7- 0.2+
20020808 675 0.5- 0.6+ 20030622 621 0.1- 0.4+ 20050606 290 0.1- 0.1-
20020808 675 0.3- 0.5+ 20030622 621 0.1- 0.4+ 20050606 290 0.0 0.1-
20020808 675 0.1- 0.5+ 20030705 204 1.4+ 0.5- 20050607 304 0.4- 0.1-
20030531 675 0.0 0.7+ 20040422 568 0.1- 0.0 20050607 304 0.2- 0.0
20030531 675 0.1+ 0.6+ 20040422 568 0.1- 0.1+ 20070614 688 0.3+ 0.2-
20030531 675 0.1+ 0.6+ 20040526 304 0.2- 0.2+ 20070614 688 0.2+ 0.3-
Revised elements and residuals from the Minor Planet Center
(new astrometry is shown in red)
2002 MS4
Epoch 2007 Oct. 27.0 TT = JDT 2454400.5 MPC
M 207.05902 (2000.0) P Q
n 0.00362669 Peri. 213.91896 +0.35918782 -0.91607043 T = 2496571.48112 JDT
a 41.9561806 Node 215.97735 +0.90941049 +0.38648302 q = 36.0926496
e 0.1397537 Incl. 17.67073 +0.20965846 -0.10698527
P 272 H 3.7 G 0.15 U 3
From 33 observations at 10 oppositions, 1954-2007, mean residual 0".42.
Residuals
19540408 675 0.1+ 0.6- 19550416 675 0.1- 0.2+ 19820809 413 0.0 0.3+ 19830614 413 0.1- 0.1+ 19830701 413 0.4+ 0.2+ 19830710 413 0.2- 0.5+ 19920623 413 0.3- 0.1-
DSS precovery images are from DSS plate archive scans, which are © copyright California Institute of Technology.
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