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IAUC 6463: Prob. N IN Cru; BL Lac; C/1995 O1

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IAUC number 

                                                  Circular No. 6463
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
Phone 617-495-7244/7440/7444 (for emergency use only)


PROBABLE NOVA IN CRUX
     W. Liller, Vina del Mar, Chile, reports his discovery with
PROBLICOM of a probable nova on a photograph taken on Aug. 26.04 UT.
The candidate is located at R.A. = 12h10m.51, Decl. = -61d45'.3 (equinox
2000.0).  Magnitude estimates: Aug. 7.0, [11.5: (Liller); 26.98, 9.25
(Liller; CCD, broad-band V system, compared to nearby GSC stars);
27.781, 10.1 (D. Overbeek, Edenvale, South Africa; visual; communicated
by J. Mattei).


BL LACERTAE
     A. Robinson, Division of Physics and Astronomy, University of
Hertfordshire, Hatfield, writes, with regard to IAUC 6457:
"This source was observed on Aug. 20.1 UT by E. Corbett and myself
using the ISIS spectrograph of the 4.2-m William Herschel Telescope.
A broad H-alpha emission line is clearly present in our spectrum
with equivalent width 0.5 +/- 0.04 nm and FWHM approximately 4000 km/s.
Narrow [N II] 658.4-nm (FWHM approximately 300 km/s) is also present,
superimposed on the H-alpha line."


COMET C/1995 O1 (HALE-BOPP)
     Numerous observers have reported steady, strong jetting activity
from both visual and CCD observations of this comet during the past few
months.  The jets, including a noticeable northward fan, have significantly
increased in visibility since May.  Visual observations on Aug. 14-15
by S. J. O'Meara (Volcano, HI, 0.12-m refractor) and by J. E. Bortle
(Stormville, NY, 0.41-m reflector) reveal a bright, "J"-shaped,
ever-widening fan spanning some 40-50 deg centered close to due north
and extending up to 10' in length.  K. Birkle, Centro Astronomico
Hispano-Aleman, reports that CCD exposures with the 1.2-m telescope
during May 29-June 25 using various filters show the northward fan as three
separate structures; a 30-s R image with the 2.2-m reflector on July
19.86 UT (taken with the help of E. Thommes and H. H. Hippelein) also shows
low-contrast features in p.a. 45 and 70 deg that were also possibly present
in May, while two brighter structures rotated from p.a. 156 to 142 deg
and from 235 to 278 deg during the 7-week interval.  F. Manzini,
C. Guaita and F. Crippa write that CCD images obtained with the 0.33-m
reflector at the SAS Observatory, near Milan, show jets near
p.a. 40, 145 and 270 deg to be very faint on May 28 but almost
as bright as the main tail by July 31, with further brightening and the
development of several secondary jets by Aug. 16; in view of the numerous
linear spikes extending 10-15 arcsec from the nucleus and having little
tendency to bend they remark that the comet resembles a porcupine.

                      (C) Copyright 1996 CBAT
1996 August 28                 (6463)              Brian G. Marsden

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