Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 4661: 1988 SM; GS 1843-024; NSV 6708

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 4660 SEARCH Read IAUC 4662
IAUC number 

                                                  Circular No. 4661
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


1988 SM
     C.-Y. Shao reports the following observation, obtained at Oak Ridge
Observatory with the 1.55-m reflector:

       1988 UT            R.A.   (1950)   Decl.       Mag.
       Oct.  7.09096    22 21 01.16    - 5 03 21.2    17.5

     Orbital elements from the 5 available observations (cf. IAUC 4658):

     T = 1988 Aug. 11.63 ET           Peri. = 313.03
     e = 0.3468                       Node  =   0.41    1950.0
     q = 1.0933 AU                    Incl. =  10.99
       a =  1.6739 AU      n = 0.45512      P =   2.17 years

     1988 ET      R.A. (1950) Decl.     Delta      r      Mag.
     Oct.  6    22 19.22    - 5 58.1    0.256    1.212    16.6
          11    22 27.41    - 2 03.4
          16    22 35.51    + 1 10.4    0.320    1.252    17.2
          21    22 43.63    + 3 51.3
          26    22 51.83    + 6 06.2    0.394    1.296    17.8
          31    23 00.12    + 8 00.5
     Nov.  5    23 08.55    + 9 38.6    0.479    1.342    18.3


GS 1843-024
     F. Makino and the Ginga Team, Institute of Space and Astronautical
Science, telex:  "The x-ray astronomy satellite Ginga discovered
pulsating x-ray emission on Sept. 28 from a source designated GS 1843-024,
located at R.A. = 18h43m.0 +/- 2m.4, Decl. = -2.4 deg +/- 0.1 deg
(equinox 1950.0).  This region includes x-ray source 2S 1845-024.  The
pulse period was 94.8 +/- 0.1 sec and x-ray intensity was about 8 mCrab
on Oct. 3."


NSV 6708
     Visual magnitude estimates (cf. IAUC 4650):  Aug. 30.38 UT, 7.3
(P. Williams, Heathcote, N.S.W.); Sept. 4.45, 7.4 (Williams); 7.39,
7.9 (R. H. McNaught, Siding Spring Observatory); 8.50, 8.5 (McNaught);
11.50, 8.4 (A. Pearce, Woodlands, W. Australia); 16.49, 12.0: (McNaught);
20.41, 14.0 (McNaught); Oct. 1.40, 13.9 (McNaught).


1988 October 11                (4661)             Daniel W. E. Green

Read IAUC 4660 SEARCH Read IAUC 4662

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

Valid HTML 4.01!