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[vsnet-alert 6966] HV Vir extremely rare outburst
- Date: Fri, 4 Jan 2002 12:13:12 +0100
- To: vsnet-alert@kusastro.kyoto-u.ac.jp, vsnet-outburst@kusastro.kyoto-u.ac.jp, vsnet-campaign@kusastro.kyoto-u.ac.jp, vsnet-campaign-dn@kusastro.kyoto-u.ac.jp, vsnet-campaign-hvvir@ooruri.kusastro.kyoto-u.ac.jp
- From: Patrick Schmeer <extpasc@rz.uni-sb.de>
- Subject: [vsnet-alert 6966] HV Vir extremely rare outburst
- Cc: news@cba.phys.columbia.edu
- Delivered-To: vsnet-alert@kusastro.kyoto-u.ac.jp
- Sender: owner-vsnet-alert@ooruri.kusastro.kyoto-u.ac.jp
- User-Agent: Mutt/1.2.5i
Visual magnitude estimates by P. Schmeer, Bischmisheim, Germany:
HV VIRGINIS (UGSU)
2001 Dec. 30.23 UT, [13.3 ; 31.22 , [13.0
2002 Jan. 4.229 UT, 13.0 ; 4.237, 13.0
Sequence: GSC
Instrument: 203-mm SCT
Before submitting my initial report (vsnet-alert 6964) I checked for
nearby known minor planets (see also vsnet-alert 5766-5768).
The last recorded outburst (a supermaximum) was detected by me on
1992 Apr. 20.928 UT at mv= 12.0 (IAUC 5502).
The mean cycle length of HV Vir is 10.4 years (or a fraction thereof).
Suitable comparison stars:
GSC AAVSO Misselt
GSC 300.406 12.48 12.4
GSC 300.56 12.73 13.1
GSC 300.1074 13.34 13.4
GSC 300.603 14.35 14.0 V=14.148, B-V=0.589
Photometry for the first three stars is urgently required.
The GSC magnitudes seem to be 0.2 magnitudes too faint.
Regards,
Patrick
P.S.:
VIRHV 20011230.23 <133 Scp
VIRHV 20011231.22 <130 Scp
VIRHV 20020104.229 130 Scp
VIRHV 20020104.237 130 Scp
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