Central Bureau for Astronomical Telegrams
IAUC 3091: P/ENCKE; 1977j; SN IN NGC 1411
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Read IAUC 3092
Circular No. 3091
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
PERIODIC COMET ENCKE
M. F. A'Hearn, R. L. Millis and R. Sopka, Lowell Observatory,
provide the following semiaccurate position, obtained visually with
the 107-cm reflector. The coma was estimated to be 1'.0-1'.5 across.
Photoelectric observations gave the production rate of CN as 10**25.2
molecules per second.
1977 UT R. A. (1950) Decl. m1
July 14.44444 5 37 10 +29 27. 2 13 +/- 1
The ephemeris on IAUC 3072 is from the orbital elements in Handb.
Br. Astron. Assoc. for 1976 and also Astron. J. (1974) 79, 413
(although the above observation suggests that the indicated correction
of Delta-T = +0.015 day is too large). Since the comet was observed
near aphelion in 1975 it does not receive a letter designation.
PERIODIC COMET WOLF-HARRINGTON (1977j)
This comet has been recovered by G. Schwartz and C.-Y. Shao on
exposures with the Harvard College Observatory's 155-cm reflector,
as shown below. The images of the comet are well condensed. The
position is in very close agreement with the ephemeris on IAUC 3074.
1977 UT R. A. (1950) Decl. m2 Observer
July 11.28885 23 40.4 +21 51 ~19.5 Schwartz
14.27711 23 41.7 +22 26 ~19.5 Shao
SUPERNOVA IN NGC 1411
M. E. Sim, Royal Observatory, Edinburgh, reports that H. C.
Arp and B. F. Madore have discovered a supernova in the bright
elliptical galaxy NGC 1411. On a 70-min exposure with the U.K.
Schmidt telescope at Siding Spring on 1976 Oct. 28 the object
appears as a diffraction spike or jet on the eastern side of the
galaxy. It was confirmed on a 10-min exposure by M. Hartley on
1977 July 11, the magnitude being very approximately 17. Its position
(uncertainty +/- 10") is R.A. = 3h37m06s, Decl. = -45o15'.8 (equinox
1950.0), approximately 170" due east of the nucleus of the galaxy.
The object is not visible on the survey plate taken of the region
at the European Southern Observatory on 1975 Nov. 27.
1977 July 15 (3091) Brian G. Marsden
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