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IAUC 5203: V854 Cen; 1990N; 1991g; 1991d

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IAUC number 

                                                  Circular No. 5203
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


V854 CENTAURI
     The following visual magnitude estimates (cf. IAUC 5064) indicate
that this R CrB-type variable is again fading:  1990 July 5.47
UT, 9.3 (P. Williams, Heathcote, N.S.W.); 6.55, 8.8 (Williams);
Sept. 25.53, 8.4 (A. Pearce, Scarborough, W.A.); Oct. 17.47, 7.7
(Pearce); Dec. 24.29, 7.4 (V. F. de Assis Neto, Sao Francisco de
Oliveira, Brazil); 1991 Feb. 25.51, 7.3 (Williams); 28.63, 7.3
(Williams); Mar. 3.49, 7.7 (Williams); 5.47, 7.8 (Williams);
7.56, 8.5 (Williams).


SUPERNOVA 1990N IN NGC 4639
     C. Buil and E. Thouvenot report that an observation made Feb.
23.15 UT at Pic du Midi Observatory showed SN 1990N at V = 18.2.


COMET McNAUGHT-RUSSELL (1991g)
     Extension to the ephemeris on IAUC 5189:

     1991 ET      R.A. (1950) Decl.     Delta      r       m1
     Mar.  5    10 49.79    -18 29.6    3.982    4.898    16.4
          10    10 44.91    -17 14.3
          15    10 40.17    -15 56.2    3.986    4.917    16.4
          20    10 35.62    -14 36.3
          25    10 31.32    -13 15.4    4.031    4.936    16.5
          30    10 27.32    -11 54.3
     Apr.  4    10 23.65    -10 34.0    4.115    4.957    16.5
           9    10 20.34    - 9 15.2
          14    10 17.41    - 7 58.4    4.233    4.978    16.6
          19    10 14.87    - 6 44.4
          24    10 12.73    - 5 33.4    4.382    5.001    16.7
          29    10 10.98    - 4 25.9
     May   4    10 09.61    - 3 22.1    4.553    5.025    16.8


COMET SHOEMAKER-LEVY (1991d)
     Total visual magnitude estimates by A. Hale, Las Cruces, NM
(0.41-m reflector):  Feb. 15.40 UT, 13.7; 21.36, 13.7.


1991 March 8                   (5203)             Daniel W. E. Green

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