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IAUC 3053: 1977c; SN IN NGC 5406; HEAO-A GUEST INVESTIGATOR PROGRAM

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IAUC number 

                                                  Circular No. 3053
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK     Telex: 921428
Telephone: (617) 864-5758


COMET LOVAS (1977c)
     The following precise positions were obtained by R. E.
McCrosky, G. Schwartz and C. Y. Shao with the 155-cm reflector at
the Harvard College Observatory's Agassiz Station.  Measurer: Shao.
On the Mar. 20 exposure the comet was diffuse with a small
condensation and a possible tail in p.a. ~ 0o.

     1977 UT             R. A. (1950) Decl.         m2
     Mar. 20.10223    10 11 16.55   +33 16 44.2   ~17
          22.02465    10 09 55.30   +33 06 04.9
          22.36120    10 09 41.06   +33 04 10.0

     The following parabolic elements, by B. G. Marsden, satisfy
the five accurate positions within ~ 2".  The ephemeris on IAUC
3052 requires correction by perhaps +2' in Decl. by Apr. 27.

       T = 1976 Nov. 4.753 ET    Peri. = 146.650
                                 Node  = 337.508   1950.0
       q = 5.71478 AU            Incl. =  64.439


SUPERNOVA IN NGC 5406
     B. Szeidl, Konkoly Observatory, cables that M. Lovas has
discovered a supernova 33" west and 23" south of the nucleus of NGC
5406.  On Mar. 18 the photographic magnitude was 14.0.


HEAO-A GUEST INVESTIGATOR PROGRAM
     The first High Energy Astronomy Observatory (HEAO-A) is scheduled
for launch on Apr. 15.  The Observatory contains four large x-ray
and gamma-ray astronomy experiments designed to operate in the energy
range from 0.2 keV to 10 MeV.  Scanning will be accomplished by
rotating the spacecraft at a rate of from 0.1 to 0.03 rpm about an
axis aligned with the sun.  Experiments view in the scan plane (90o
to the sun) with fields of view from 1o to 20o along the scan direction
and from 0.5o to 20o perpendicular to the scan direction   Details
for participation in a Guest Investigator Program for HEAO-A
will be distributed from NASA in the near future.  The coordinator
of the program will be Dr. G. J. Fishman, Code E562, Marshall Space
Flight Center, AL 35812, U.S.A. (telephone 205-453-2701).


1977 March 25                  (3053)              Brian G. Marsden

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