Central Bureau for Astronomical Telegrams
IAUC 4936: 1989h1; AB Aur; V854 Cen
The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).
Read IAUC 4937
Circular No. 4936
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
PERIODIC COMET VAN BIESBROECK (1989h1)
J. Gibson, OAO Corporation and Jet Propulsion Laboratory,
reports his recovery of this comet with the Palomar 1.5-m
reflector (+ CCD + Gunn r filter); the object appears stellar.
The following positions indicate a correction of Delta(T) =
-0.01 day to the orbit on MPC 13042 (ephemeris on MPC 15580):
1989 UT R.A. (1950) Decl. m2
Dec. 9.51631 12 42 04.51 - 1 11 19.9 21
9.52863 12 42 05.02 - 1 11 23.4
9.54023 12 42 05.52 - 1 11 25.1
9.55117 12 42 05.96 - 1 11 28.0
10.51184 12 42 47.78 - 1 14 42.5
10.51786 12 42 48.02 - 1 14 43.2
10.52421 12 42 48.35 - 1 14 44.5
10.53023 12 42 48.54 - 1 14 45.6
AB AURIGAE
A. Damineli and R. Viotti, Istituto Astrofisica Spaziale CNR,
Frascati, report: "We have observed the 990- to 1100-nm spectrum
of the Herbig Ae star AB Aur on Nov. 15.0 and 16.0 UT at the 1.5-m
telescope of the Bologna Astronomical Observatory with a resolution
of about 3000. He I (1083 nm) is present with a P-Cyg profile, and
an emission-absorption radial-velocity difference of 300 km/s
and equivalent widths (Weq) of about 0.14 nm (absorption component)
and 0.20 nm (emission component). We have also found strong
emissions of the Paschen lines P-delta (Weq = 0.67 nm) and P-gamma
(Weq = 0.28 nm), and weak Fe II at 999.7 nm (Weq = 0.02 nm) in
the wing of the broad P-delta photospheric line."
V854 CENTAURI
This R CrB-type variable is again fading, as indicated by the
following visual magnitude estimates (cf. IAUC 4879): Oct. 4.41 UT,
9.5 (P. F. Williams, Heathcote, N.S.W.); 5.41, 9.3 (Williams); 8.41,
8.6 (Williams); 10.41, 8.3 (Williams); 11.39, 8.1 (Williams); 18.38,
7.5 (Williams); Dec. 5.82, 7.5 (A. Pearce, Scarborough, W.
Australia); 10.82, 7.8 (Pearce); 25.81, 9.2 (Pearce); 30.80, 11.3
(Pearce).
1989 December 30 (4936) Daniel W. E. Green
Read IAUC 4937
Our Web policy. Index to the CBAT/MPC/ICQ pages.
