Central Bureau for Astronomical Telegrams
IAUC 2880: P/PONS-WINNECKE
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Circular No. 2880
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK
Western Union: RAPID SATELLITE CAMBMASS
PERIODIC COMET PONS-WINNECKE
The following prediction, by B. G. Marsden, is based on 124
observations 1939-1970, with allowance for perturbations by all
nine planets and nongravitational effects. It is more recent than
the one in Handb. Br. Astron. Assoc. for 1976.
T = 1976 Nov. 28.7406 ET Epoch = 1976 Dec. 8.0 ET
Peri. = 172.3627 e = 0.634702
Node = 92.7431 1950.0 a = 3.433407 AU
Incl. = 22.2942 n = 0.1549231
q = 1.254216 AU P = 6.362 years
For dT = +1d
1976 ET R. A. (1950) Decl. Delta r dR.A. dDecl. m2
Jan. 3 10 33.27 +30 37.5 2.623 3.341 -0m84 + 1'8 21.1
13 10 31.12 +32 18.4 -0.91 + 1.7
23 10 26.34 +34 09.3 2.342 3.218 -0.97 + 1.4 20.7
Feb. 2 10 18.92 +36 02.9 -1.03 + 0.9
12 10 09.20 +37 49.9 2.166 3.091 -1.06 + 0.3 20.4
22 9 57.94 +39 20.4 -1.07 - 0.4
Mar. 3 9 46.22 +40 26.7 2.105 2.959 -1.05 - 1.1 20.3
13 9 35.36 +41 04.4 -1.01 - 1.7
23 9 26.53 +41 13.9 2.139 2.824 -0.95 - 2.0 20.4
Apr. 2 9 20.54 +40 58.2 -0.89 - 2.2
12 9 17.81 +40 22.0 2.232 2.684 -0.83 - 2.2 20.5
22 9 18.37 +39 29.6 -0.79 - 2.0
May 2 9 22.05 +38 24.2 2.344 2.541 -0.76 - 1.6 20.6
12 9 28.55 +37 08.2 -0.74 - 1.2
22 9 37.49 +35 42.8 2.446 2.394 -0.73 - 0.7 20.6
June 1 9 48.58 +34 08.3 -0.73 - 0.1
11 10 01.53 +32 24.9 2.519 2.244 -0.74 + 0.5 20.5
21 10 16.06 +30 32.0 -0.75 + 1.3
July 1 10 32.00 +28 29.0 2.554 2.092 -0.77 + 2.1 20.3
11 10 49.20 +26 15.4 -0.80 + 2.9
21 11 07.54 +23 50.4 2.550 1.940 -0.83 + 3.9 20.1
31 11 26.97 +21 13.4 -0.87 + 5.0
Aug. 10 11 47.45 +18 24.0 2.512 1.789 -0.91 + 6.1 19.8
m2 = 16.0 + 5 log Delta + 5 log r + 0.03 (phase angle)
1975 December 8 (2880) Brian G. Marsden
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