Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 4524: 1987b1; 1987f1; 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 4523 SEARCH Read IAUC 4525
IAUC number 

                                                  Circular No. 4524
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 McNAUGHT (1987b1)
     Total visual magnitude estimates: 1987 Dec. 28.54 UT, 7.5:
(A. Hale, Las Cruces, NM, 0.20-m reflector; twilight, low
altitude); 30.27, 6.5 (J. D. Shanklin, Cambridge, England, 20 x 80
binoculars); 31.54, 7.5 (Hale, 0.20-m reflector; twilight; with
0.41-m reflector, 15' tail in p.a. 345 ).


COMET FURUYAMA (1987f1)
     Improved parabolic orbital elements from MPC 12710:

         T = 1988 Mar. 3.0651 ET     W = 233.6255
                                     O = 250.0571   1950.0
         q =   1.679678 AU           i = 117.7854

     1987/88 ET   R.A. (1950) Decl.     Delta      r       m1
     Dec. 31     2 31.80    - 7 44.7    1.258    1.873     9.7
     Jan. 10     2 08.63    -12 54.6
          20     1 53.45    -16 28.5    1.615    1.773    10.0
          30     1 44.22    -19 00.4
     Feb.  9     1 39.27    -20 55.0    1.966    1.707    10.3
          19     1 37.44    -22 28.6
          29     1 37.93    -23 52.3    2.233    1.680    10.5
     Mar. 10     1 40.16    -25 14.0
          20     1 43.77    -26 39.9    2.383    1.695    10.7
          30     1 48.50    -28 15.6
     Apr.  9     1 54.16    -30 06.5    2.410    1.749    10.8
          19     2 00.67    -32 18.4
          29     2 07.96    -34 58.0    2.328    1.839    11.0

     Total visual magnitude estimate by A. Hale, Las Cruces, NM
(0.41-m reflector): 1987 Dec. 28.23 UT, 10.0 (moonlight).


NOVA VULPECULAE 1987
     Photoelectric photometry by R. Monella, Covo, Italy: 1987
Dec. 23.716 UT, V = 8.11, B-V = +0.51, U-B = -0.96; 26.714, 8.27,
+0.46, -0.91; 27.719, 8.38, +0.45, -0.94.
     Visual magnitude estimates: 1987 Dec. 28.71 UT, 8.4 (S.
Baroni, Milan, Italy); 29.72, 8.7 (E. Schweitzer, Strasbourg,
France); 31.71, 8.7 (P. Schmeer, Bischmisheim, West Germany).


1988 January 1                 (4524)              Brian G. Marsden

Read IAUC 4523 SEARCH Read IAUC 4525

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

Valid HTML 4.01!