Central Bureau for Astronomical Telegrams
IAUC 3785: STARLIKE OBJECT IN HERBIG-HARO 57; 1982k; 1983c
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Circular No. 3785
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM Telephone 617-864-5758
STARLIKE OBJECT IN HERBIG-HARO 57
J. A. Graham, Cerro Tololo Interamerican Observatory, reports
the appearance of a starlike object at the northeastern tip of HH
57. The star is not seen at all on the 1976 discovery photographs
published by Schwartz (1977, Ap.J. Suppl. 35, 161), but there is a
faint, diffuse patch at the position on the blue, red and near-
infrared transparencies of the ESO-SRC Atlas (cf. Reipurth 1981,
A. Ap. Suppl. 44, 379). Image-tube photographs taken with the
Yale 1-m telescope at Cerro Tololo on 1983 Mar. 16 and 17 show the
object to be much brighter than before, especially in the near
infrared, and it now appears stellar, not diffuse. Line emission
may be present, but the radiation is clearly mainly continuous.
The infrared source IRS 8 (R.A. = 16h28m56s8, Decl. = -44deg49'08",
equinox 1950.0: Reipurth and Wamsteker 1982, ESO Prepr. No. 214) is
closely coincident in position. No new photometry is yet available,
but the star seems visually near mag 16. It is possible that the
observations have caught a T-Tau star or a similar pre-main sequence
object at an unusually active phase. Further observations,
particularly spectroscopy and infrared photometry, are urged.
PERIODIC COMET KOPFF (1982k)
Total visual magnitude estimate by J. Bortle, Stormville, NY
(0.50-cm reflector): Mar. 16.35 UT, 11.9; comet totally diffuse.
PERIODIC COMET BOWELL-SKIFF (1983c)
Ephemeris continuation from MPC 7786 (elements on MPC 7773):
1983 ET R.A. (1950.0) Decl. p r m1
Apr. 16 9 39.73 +13 34.4 1.292 1.971 17.0
26 9 51.59 +12 07.8
May 6 10 05.15 +10 33.2 1.500 2.014 17.4
16 10 20.01 + 8 51.6
26 10 35.82 + 7 04.1 1.740 2.076 17.9
June 5 10 52.26 + 5 12.1
15 11 09.15 + 3 16.7 2.005 2.154 18.3
25 11 26.33 + 1 19.0
July 5 11 43.65 - 0 39.5 2.290 2.245 18.8
1983 March 25 (3785) Brian G. Marsden
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