Central Bureau for Astronomical Telegrams
IAUC 4942: 1989e1; V635 Cas
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 4943
Circular No. 4942
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
COMET SKORICHENKO-GEORGE (1989e1)
Improved parabolic orbital elements from MPC 15673:
T = 1990 Apr. 11.942 ET Peri. = 137.767
Node = 279.284 1950.0
q = 1.57114 AU Incl. = 59.361
1990 ET R.A. (1950) Decl. Delta r m1
Jan. 9 20 37.97 +28 39.6 2.410 2.005 9.9
19 21 03.34 +30 37.1
29 21 32.12 +32 49.8 2.284 1.855 9.5
Feb. 8 22 04.72 +35 11.5
18 22 41.48 +37 32.2 2.182 1.729 9.1
28 23 22.50 +39 38.9
Mar. 10 0 07.32 +41 16.6 2.139 1.635 8.8
20 0 54.76 +42 11.3
30 1 42.99 +42 14.5 2.174 1.581 8.7
Total visual magnitude estimates: 1989 Dec. 22.77 UT, 10.7 (G. M.
Hurst, Basingstoke, England, 0.44-m reflector); 24.74, 10.0 (J.-C.
Merlin, Le Creusot, France, 0.15-m reflector); 27.74, 10.2 (A. Boattini,
Piazzano, Italy, 0.40-m reflector); 31.11, 10.2 (A. Hale, Las Cruces,
NM, 0.41-m reflector); 1990 Jan. 3.47, 9.6 (E. Jacobson, Evansville, MN,
0.25-m reflector); 8.02, 10.1 (G. Kronk, Troy, IL, 0.33-m reflector);
9.73, 9.3 (A. Pereira, Cabo da Roca, Portugal, 0.15-m reflector);
13.03, 9.8 (Kronk).
V635 CASSIOPEIAE
R. M. Wagner, B. M. Peterson, R. Bertram and J. Kingdon, Ohio
State University, report: "Spectra (Perkins 1.8-m telescope + CCD
spectrograph) obtained on Jan. 4, 6 and 9 of the optical counterpart
of the x-ray pulsar 4U 0115+63, which has gone into another long-term
outburst (IAUC 4931), show only the characteristic H-alpha emission.
The equivalent width, integrated flux and FWHM of the H-alpha emission
are consistent with those measured from spectra taken during relatively
quiescent periods in previous years. We estimate from our new spectra
a mean value of V about 15. Nevertheless, the spectroscopic changes
leading up to and during an outburst are subtle (viz. Kriss et al.
1980, Ap.J. 266, 806), and the object should be monitored at optical
and x-ray wavelengths for at least the next 60-90 days."
1990 January 13 (4942) Brian G. Marsden
Read IAUC 4943
Our Web policy. Index to the CBAT/MPC/ICQ pages.
