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IAUC 3226: 1978f; 2S 1702-363; NGC 1851; N Ser 1978

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IAUC number 

                                                  Circular No. 3226
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 MEIER (1978f)
     J. Crovisier, D. Despois, E. Gerard and I. Kazes, Nancay Radio
Observatory, report that OH was detected in emission at 1667 and
1665 MHz on May 30 and 31, the antenna temperature being 3 cK at
1667 MHz.  Assuming an inverse-square law for the variation of the
production rate with heliocentric distance, they deduce that comet
1978f is six times brighter than comet 1973 XII (pre-perihelion)
and four times brighter than comet 1976 VI (post-perihelion).  They
predict an OH production rate for comet 1978f near perihelion of
4 x 10**29 molecules s**-1


2S 1702-363
     I. S. Glass and M. W. Feast, South African Astronomical
Observatory, report that an infrared search of the error box on Apr. 3
yielded a source with J = 9.06, H = 7.72, K = 6.87, 1 = 6.06 approximately
8" east of star 2.  This object was visible (in the dark of
the moon) as bright as star 2 in a red-sensitive Varo tube on May
9.0 UT.  No change was noted in the infrared on May 21.  The source
is presumably the same as that noted by Zuiderwijk (IAUC 3221,
where the position was erroneously given as 8' east of star 2).
Increased visual brightness must have lasted for at least one day.


NGC 1851
     J. E. Hesser, Dominion Astrophysical Observatory, and S. J.
Shawl, University of Kansas, write: "Image-tube spectrograms (dispersion
125 A/mm) obtained on four nights in May from Cerro Tololo
Interamerican Observatory of the core of NGC 1851, as well as of
the star UV5, all show H-alpha in absorption.  Higher-dispersion
photoelectric scans made with the AURA Fabry-Perot interferometer
confirm the previous null results on the presence of ionized hydrogen
(Hesser and Shawl 1977, Astrophys. J. 217, L143).  The gas reported
on IAUC 3209 must therefore be predominantly neutral."


NOVA SERPENTIS 1978
     Visual magnitude estimates: Apr. 24.50 UT, 11.0 (J. Morgan,
Prescott, AZ); 29.40, ~ 12.4 (Morgan); May 10.07, 13.1 (G. Hurst,
Northampton, Eng.); 10.25, 13.2 (Morgan); 13.41, 13.8 (P. Goodwin,
Shreveport, LA); 29.24, 13.5 (Morgan); June 3.28, ~ 15.2 (Morgan).


1978 June 7                    (3226)              Brian G. Marsden

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