Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 4509: 1987s; N Vul 1987

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 4508 SEARCH Read IAUC 4510
IAUC number 

                                                  Circular No. 4509
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 BRADFIELD (1987s)
     Continuation to the ephemeris on IAUC 4483:

     1987/88 ET   R.A. (1950) Decl.     Delta      r       m1
     Dec. 11    20 56.88    +20 30.5    0.835    1.061     5.4
          16    21 32.87    +22 35.9
          21    22 09.61    +24 13.3    0.853    1.169     5.8
          26    22 45.90    +25 20.2
          31    23 20.63    +25 58.2    0.927    1.287     6.4
     Jan.  5    23 52.98    +26 12.0
          10     0 22.53    +26 07.9    1.051    1.411     7.1
          15     0 49.23    +25 51.9
          20     1 13.23    +25 29.2    1.215    1.539     7.8
          25     1 34.80    +25 03.4
          30     1 54.26    +24 36.9    1.407    1.668     8.5
     Feb.  4     2 11.91    +24 11.0
           9     2 28.03    +23 46.7    1.620    1.798     9.1
          14     2 42.87    +23 24.3
          19     2 56.64    +23 03.9    1.846    1.928     9.7
          24     3 09.51    +22 45.5
          29     3 21.60    +22 28.8    2.082    2.057    10.2

     Total visual magnitude estimates: Nov. 28.08 UT, 5.8 (A. Hale,
Las Cruces, NM, 10 x 50 binoculars); 29.12, 5.3 (D. Levy, Tucson,
AZ, 0.2-m reflector); 29.73, 6.0 (J. D. Shanklin, Cambridge, Eng.,
10 x 80 binoculars); Dec. 1.08, 5.4 (R. A. Keen, Mt. Thorodin, CO,
8 x 40 binoculars; 2  tail in p.a. 65 ); 2.12, 5.6 (C. E. Spratt,
Victoria, BC, 11 x 80 binoculars); 2.97, 5.6 (G. R. Chester,
Arlington, VA, 7 x 50 binoculars); 4.05, 5.5 (E. Jacobson,
Evansville, MN, 10 x 50 binoculars; moonlight); 5.10, 5.7 (Spratt).
     Corrigendum.  IAUC 4496, line 1, the affiliation Space
Sciences Laboratory, The Aerospace Corporation should be added.


NOVA VULPECULAE 1987
     B. A. Skiff, Lowell Observatory, communicates the following
additional Stromgren photometry (cf. IAUC 4501): Nov 27.063 UT,
'V' = 7.51, b-y = +0.522; 28.068, 7.41, +0.562; 29.061, 7.34,
+0.534; Dec. 5.06, 8.28 (clouds, raw counts), -; 7.063, 7.91,
+0.523; 8.082, 7.73, +0.508; 9.061, 7.72, +0.482.
     Corrigendum: IAUC 4501, line 24, add University of Minnesota.


1987 December 10               (4509)              Brian G. Marsden

Read IAUC 4508 SEARCH Read IAUC 4510

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

Valid HTML 4.01!