[vsnet-j 377] BD+33.2642

[Taichi Kato <tkato>]

BD+33.2642

　Q1996/077 について問い合わせを出したら以下のような天体だそうです。スペク
　トル型がちょっと変なようでもあり、Hipparcosも変光星らしいといます。
　今後追跡されてはいかがでしょうか。

　Q 番号は適当でない、とのことですので、星名にはBD+33.2642 を使うのがよい
　と思います。

Date: Wed, 27 Dec 2000 19:31:22 +0000 (GMT)
From: Roger Pickard <rdp@star.ukc.ac.uk>
Subject: [vsnet-chat 3891] Q1996/077

Dear Taichi,
The Crayford Manor House Astronomical Society are custodians of the 
Hewitt Camera Archive, a collection of some 11,000 photographic plates 
taken between 1965 and 1990 using Schmidt Cameras, specially designed for 
artificial satellite work by Joseph Hewitt of the Royal Radar 
Establishment at Malvern, England.
Back in 1997 members of the Society examined these plates on behalf of 
Guy Hurst (Editor of The Astronomer magazine) following a request by Guy 
as follows:

Q1996/077
Professional astronomers have approached us for assistance
with the spectrophotometric standard star BD +33 2642
which is located at:
RA 15h51m59.86s DEC +32 56'54.8"(2000) V=10.81
On 1995 November 2 the star, not previously known to be
variable, appeared to go into an eclipse lasting until
Nov 3 or possibly beyond. It decreased by a factor of 3
in brightness.
Does anyone have photographs or images taken on those dates
or indeed on other dates which we could check for further
variation?
Regards,
Guy

Unfortunately, we only found the star on 12 plates taken between 1969 and 
1987 when it was observed at about 10.4 on each plate (eye estimates 
using GSC 2575 539 and GSC 2575 1811 as comparisons).

Best wishes,

Roger Pickard
Hon. Sec.

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