Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 4860: 1989t; P/SCHWASSMANN-WACHMANN 1

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).

Read IAUC 4859 SEARCH Read IAUC 4861
IAUC number 

                                                Circular No. 4860
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505
MARSDEN or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPAN


PERIODIC COMET WILD 2 (1989t)
     J. Gibson, OAO Corporation and Jet Propulsion Laboratory,
reports his recovery of this comet with the Palomar 1.5-m reflector
(+ CCD + Gunn r filter).  The best frames show a faint 20" tail
in p.a. about 260 deg; the stellar nucleus is near the east end of
an elongated coma.  The observations indicate a correction of
Delta(T) = +0.02 day to the orbit on MPC 12125:

     1989 UT             R.A. (1950) Decl.        m1
     Sept.10.43605    3 52 40.03   +16 29 08.1
          10.44206    3 52 40.09   +16 29 08.0
          10.46663    3 52 40.33   +16 29 07.5   19.2
          10.47310    3 52 40.41   +16 29 07.3
          11.46262    3 52 50.88   +16 28 41.7
          11.47829    3 52 51.02   +16 28 41.0
          11.49580    3 52 51.19   +16 28 40.7

     The above observations confirm the following observations
made by K. J. Meech at Mauna Kea with the 2.2-m telescope (+ GEC
CCD + Mould R filter), when the comet was stellar in appearance:

     1988 UT             R.A. (1950) Decl.       m2
     Sept. 9.50289    1 31 25.78   + 5 53 41.8   23
           9.51534    1 31 25.29   + 5 53 40.2
           9.53027    1 31 24.94   + 5 53 37.2


PERIODIC COMET SCHWASSMANN-WACHMANN 1
     Total magnitude estimates, visual unless otherwise noted (cf.
IAUC 4820):  Aug. 3.47 UT, 13.1: (A. Hale, Las Cruces, NM, 0.41-m
reflector); 5.47, 13.2 (C. S. Morris, Pine Mountain Club, CA, 0.26-m
reflector); 12.38, 13.2 (Morris); 13.46, 13.4 (Morris); Sept. 20.49,
13.0 (M. Tsumura, Oishi, Japan, 0.31-m reflector + TP 2415 film;
image almost stellar).


R CORONAE BOREALIS
     Visual magnitude estimates (cf. IAUC 4844):  Sept. 2.13 UT, 8.4
(J. E. Bortle, Stormville, NY); 5.19, 8.4 (C. Spratt, Victoria, BC);
11.11, 8.5 (P. Collins, Scottsdale, AZ); 14.78, 8.1 (S. Baroni,
Milan, Italy); 20.04, 7.9 (E. Mayer, Akron, OH).



1989 September 22              (4860)             Daniel W. E. Green

Read IAUC 4859 SEARCH Read IAUC 4861

Our Web policy. Index to the CBAT/MPC/ICQ pages.

Valid HTML 4.01!