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[vsnet-alert 274] HT Cas: already started to brighten on Nov. 15 ?
- Date: Sat, 18 Nov 1995 16:10:52 +0900
- To: vsnet-alert@sanma.kusastro.kyoto-u.ac.jp
- From: Hajime BABA <baba@saori.kusastro.kyoto-u.ac.jp>
- Subject: [vsnet-alert 274] HT Cas: already started to brighten on Nov. 15 ?
- Sender: owner-vsnet-alert@kusastro.kyoto-u.ac.jp
Dear Colleagues,
We Ouda-team observed HT Cas on Nov 15 with a CCD with V filter
attached to a 60-cm reflector. HT Cas was found to be already
somewhat brighter than usual quiescent level at that time with an
averaged level of V=16.14 outside eclipses. An eclipse was observed
approximately centered at HJD24450037.147, with a duration of 12 min
which is apperently longer than mentioned (~6 min) by Welsh (vsnet
message #317). No evidence of orbital hump was observed.
For follow-up observers, a PostScript finding chart with V-magnitude
is available at :
http://ftp.kusastro.kyoto-u.ac.jp/pub/vsnet/charts/HT_Cas.ps .
The forecast time of eclipses of HT Cas are listed below
(times are geocentric).
YYMMDD hh:mm:ss (UT)
951118 05:16:20
951118 07:02:23
951118 08:48:27
951118 10:34:30
951118 12:20:33
951118 14:06:36
951118 15:52:39
951118 17:38:43
951118 19:24:46
951118 21:10:49
951118 22:56:52
HJD (mid-eclipse) = 2443727.93721 + 0.0736472039E
And the table of comparison stars are listed below.
AAVSO Misselt(1995) VSNET
(Alert 217) V B-V approx. V
----------------------------------------------
95
101
104
106
109 11.88 +0.59 11.84
(113)
115
124
127
134 13.62 +0.85
136
anon 13.92 +0.85 13.90 just south of HT Cas
143 14.33 +1.59 14.23
anon 14.61 +1.02 14.62 west to AAVSO (109)
151 14.70
155 15.19 +1.86 15.19
156 15.02
anon 15.58 +1.79 15.57 faint star just SE to HT Cas
159 15.82
163 16.18
166 15.91
Needless to say, close monitoring is highly encourged.
Best Regards,
Hajime Baba and Ouda-team
Return to Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
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