MPEC 1997-N01 : 1996 RR20
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Read MPEC 1997-M12
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M.P.E.C. 1997-N01 Issued 1997 July 1, 15:09 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets and routine data on comets. They are published
on behalf of Commission 20 of the International Astronomical Union by the
Minor Planet Center, Smithsonian Astrophysical Observatory,
Cambridge, MA 02138, U.S.A.
BMARSDEN@CFA.HARVARD.EDU or GWILLIAMS@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/cfa/ps/mpc.html
1996 RR20
Revision to MPEC 1996-S11
Observations:
J96R20R C1997 06 28.55558 23 03 56.24 -05 59 41.3 568
J96R20R C1997 06 29.51785 23 03 55.09 -05 59 48.9 568
J96R20R C1997 06 29.55644 23 03 55.07 -05 59 49.1 568
J96R20R C1997 06 29.59858 23 03 54.98 -05 59 48.9 568
Observer details:
568 Mauna Kea. Observer C. Veillet. 3.6-m CFH telescope + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc and reference
970628 568 37.6+ 16.1+ 970629 568 37.7+ 16.8+ MPC 28558
Orbital elements:
1996 RR20
Epoch 1997 June 1.0 TT = JDT 2450600.5 Williams
M 126.12999 (2000.0) P Q
n 0.00397943 Peri. 41.62966 -0.90431172 +0.42606330
a 39.4386486 Node 163.53058 -0.41204347 -0.85515855
e 0.1466654 Incl. 5.31779 -0.11153693 -0.29525231
P 248 H 7.0 G 0.15 U 8
Residuals in seconds of arc
960915 950 0.0 0.0 961112 711 0.4- 1.5- 961114 711 0.3- 0.1-
960915 950 0.1+ 0.0 961112 711 0.1- 0.7+ 961114 711 0.1- 0.7+
960915 950 0.0 0.3- 961112 711 0.8+ 0.6- 961114 711 0.1- 0.0
960919 950 0.1+ 0.2+ 961112 711 0.6+ 0.1- 970628 568 0.3+ 0.6-
960920 950 0.0 0.0 961113 711 0.1- 0.4+ 970629 568 0.2- 0.1-
960920 950 0.1- 0.1- 961113 711 0.5+ 0.2- 970629 568 0.2+ 0.1+
960921 950 0.1- 0.1+ 961113 711 0.2- 0.2+ 970629 568 0.3- 0.6+
961112 711 0.1- 0.1+ 961113 711 0.4- 0.2-
961112 711 0.8- 0.5+ 961114 711 0.6+ 0.4+
Ephemeris:
1996 RR20 a,e,i = 39.44, 0.15, 5 q = 33.654
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1997 07 01 23 03.89 -06 00.0 42.911 43.343 114.5 1.2 23.5
1997 07 11 23 03.60 -06 02.0 42.767 43.345 124.1 1.1 23.5
1997 07 21 23 03.20 -06 04.7 42.639 43.348 133.7 1.0 23.5
1997 07 31 23 02.69 -06 08.1 42.531 43.351 143.4 0.8 23.5
1997 08 10 23 02.09 -06 12.0 42.446 43.353 153.2 0.6 23.4
1997 08 20 23 01.43 -06 16.4 42.388 43.356 163.0 0.4 23.4
1997 08 30 23 00.72 -06 21.0 42.357 43.359 172.8 0.2 23.4
1997 09 09 22 59.99 -06 25.7 42.355 43.361 177.3 0.1 23.3
1997 09 19 22 59.27 -06 30.4 42.383 43.364 167.4 0.3 23.4
1997 09 29 22 58.58 -06 34.8 42.440 43.367 157.4 0.5 23.4
1997 10 09 22 57.95 -06 38.9 42.525 43.369 147.4 0.7 23.5
1997 10 19 22 57.41 -06 42.5 42.635 43.372 137.3 0.9 23.5
1997 10 29 22 56.96 -06 45.4 42.766 43.375 127.3 1.0 23.5
1997 11 08 22 56.64 -06 47.6 42.916 43.377 117.1 1.2 23.5
1997 11 18 22 56.46 -06 48.9 43.080 43.380 107.0 1.2 23.5
1997 11 28 22 56.41 -06 49.4 43.253 43.383 96.9 1.3 23.5
1997 12 08 22 56.52 -06 48.9 43.429 43.385 86.8 1.3 23.6
1997 12 18 22 56.77 -06 47.5 43.604 43.388 76.7 1.3 23.6
1997 12 28 22 57.16 -06 45.3 43.772 43.391 66.6 1.2 23.6
1998 01 07 22 57.69 -06 42.2 43.927 43.393 56.6 1.1 23.6
1998 01 17 22 58.34 -06 38.4 44.067 43.396 46.6 0.9 23.6
1998 01 27 22 59.09 -06 33.9 44.185 43.399 36.6 0.8 23.5
The above general orbit, although uncertain, keeps 1996 RR20 at least
10.5 AU from Neptune over a 14 000-year period centered on the present.
(Last issue was M.P.E.C. 1997-M12)
Gareth V. Williams (C) Copyright 1997 MPC M.P.E.C. 1997-N01
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