Central Bureau for Astronomical Telegrams
IAUC 4271: 1986n; 1986l
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Read IAUC 4272
Circular No. 4271
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM Telephone 617-495-7244/7440/7444
COMET SORRELLS (1986n)
Improved parabolic orbital elements from MPC 11340:
T = 1987 Mar. 9.622 ET Peri. = 70.153
Node = 74.088 1950.0
q = 1.72253 AU Incl. = 160.581
1986/87 ET R.A. (1950.0) Decl. p r m1
Nov. 16 4 29.52 +28 53.8 1.293 2.252 11.1
21 3 58.00 +28 56.9
26 3 24.06 +28 26.2 1.200 2.175 10.8
Dec. 1 2 49.72 +27 19.3
6 2 17.12 +25 42.2 1.212 2.102 10.6
11 1 47.85 +23 46.7
16 1 22.68 +21 45.5 1.320 2.033 10.7
21 1 01.66 +19 48.8
26 0 44.44 +18 02.6 1.490 1.969 10.8
31 0 30.47 +16 29.6
Jan. 5 0 19.22 +15 10.2 1.691 1.911 11.0
10 0 10.17 +14 03.7
15 0 02.90 +13 08.6 1.899 1.859 11.1
Corrigendum. On IAUC 4268, the time of the first visual
magnitude estimate should read Nov. 3.54 UT, not 3.50.
COMET WILSON (1986l)
E. Gerard, D. Bockelee-Morvan, G. Bourgois, P. Colom and J.
Crovisier, Meudon Observatory and Nancay Radio Observatory, report:
"The OH production rate is rapidly increasing. Measurements
with the Nancay radio telescope show that the 1667-MHz point-source
flux density reached 100 mJy on Nov. 12, and the line profile was
blueshifted by 0.8 km/s. During Oct. 10-18, Nov. 6-8 and Nov. 11-
12 the OH production rate was 1.7, 7.3 and 12 x 10**28 molecules/s,
respectively (following Despois et al. 1981, A.Ap. 99, 320)."
Total visual magnitude estimates: Oct. 25.06 UT, 10.5 (Y.
Sheffer, Austin, TX, 0.33-m refl.); 26.77, 10.6 (M. Zanotta,
Milan, Italy, 0.30-m refl.); 27.76, 10.6 (Zanotta, 0.25-m refl.);
29.02, 11.4 (G. R. Chester, Rixeyville, VA, 0.20-m refl.); Nov.
4.11, 11.3 (A. Hale, Las Cruces, NM, 0.20-m refl.).
1986 November 17 (4271) Brian G. Marsden
Read IAUC 4272
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