Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 4976: MWC 560; Poss. N IN Sgr; 1990 DA; 1989r

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 4975 SEARCH Read IAUC 4977
IAUC number 

                                                  Circular No. 4976
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


MWC 560
     M. Feast, South African Astronomical Observatory, telexes the
following preliminary photometric results obtained by F. Marang at
SAAO on Feb. 28/Mar. 1, showing that this peculiar object is
clearly in outburst (cf. IAUC 4955, 4969):  V = 9.64, B-V = +0.29,
U-B = -0.66, V-R = +0.46, V-I = +1.52.


POSSIBLE NOVA IN SAGITTARIUS
     W. Liller, Vina del Mar, Chile, reports the following
photovisual magnitudes (cf. IAUC 4974):  Feb. 28.34 UT, 9.3 +/- 0.2;
Mar. 1.37, 9.3 +/- 0.2; 2.38, 9.6 +/- 0.2; 6.33, 10.7 +/- 0.4;
8.34, 11.5 +/- 0.4.


1990 DA
     Extended ephemeris (cf. IAUC 4966) from elements on MPC 16033:

     1990 ET      R.A. (1950) Decl.     Delta      r       V
     Mar. 10     8 51.31    +31 58.2    0.566    1.454    15.7
          20     9 06.03    +34 55.2
          30     9 21.99    +36 15.9    0.802    1.569    16.7
     Apr.  9     9 38.78    +36 30.9
          19     9 55.99    +36 00.9    1.072    1.688    17.5
          29    10 13.35    +34 59.0
     May   9    10 30.72    +33 34.7    1.361    1.807    18.2
          19    10 47.95    +31 54.5
          29    11 05.01    +30 03.0    1.663    1.925    18.7


COMET OKAZAKI-LEVY-RUDENKO (1989r)
     Extended ephemeris (cf. IAUC 4934) from elements on MPC 15520:

     1990 ET      R.A. (1950) Decl.     Delta      r       m1
     Mar. 10     2 47.62    -57 04.3    2.380    2.185    13.8
          20     3 01.85    -55 55.8
          30     3 17.01    -55 08.1    2.655    2.457    14.5
     Apr.  9     3 32.97    -54 39.9
          19     3 49.66    -54 29.8    2.885    2.719    15.1
          29     4 07.03    -54 37.2
     May   9     4 25.06    -55 01.2    3.083    2.973    15.7


1990 March 8                   (4976)             Daniel W. E. Green

Read IAUC 4975 SEARCH Read IAUC 4977

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

Valid HTML 4.01!