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[vsnet-obs 5373] prediction of eclipse times of OY Car
- Date: Sun, 30 Mar 1997 21:48:40 +0900 (JST)
- To: vsnet-obs
- From: Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>
- Subject: [vsnet-obs 5373] prediction of eclipse times of OY Car
- Sender: owner-vsnet-obs@kusastro.kyoto-u.ac.jp
Dear southern friends,
I have calculated eclipse times of OY Car using the Wood et al.'s
ephemeris (cf. vsnet-alert 806).
HJED = 2443993.553691 + 0.0631209295 E
+/-50 +/-20
YYMMDD hh:mm:ss alt
----------------------
970330 01:13:29 -54
970330 02:44:22 -50
970330 04:15:16 -44
970330 05:46:10 -36
970330 07:17:03 -29
970330 08:47:57 -22
970330 10:18:50 -17
970330 11:49:44 -15
970330 13:20:37 -15
970330 14:51:31 -18
970330 16:22:24 -23
970330 17:53:18 -29
970330 19:24:12 -37
970330 20:55:05 -44
970330 22:25:59 -51
970330 23:56:52 -54
970331 01:27:46 -53
970331 02:58:39 -49
970331 04:29:33 -42
970331 06:00:26 -34
970331 07:31:20 -27
970331 09:02:14 -21
970331 10:33:07 -17
970331 12:04:01 -15
970331 13:34:54 -15
970331 15:05:48 -19
970331 16:36:41 -24
970331 18:07:35 -31
970331 19:38:28 -38
970331 21:09:22 -46
970331 22:40:16 -52
970401 00:11:09 -54
970401 01:42:03 -53
970401 03:12:56 -48
970401 04:43:50 -41
970401 06:14:43 -33
970401 07:45:37 -26
970401 09:16:30 -20
970401 10:47:24 -16
970401 12:18:18 -15
970401 13:49:11 -16
970401 15:20:05 -19
970401 16:50:58 -25
970401 18:21:52 -32
970401 19:52:45 -40
970401 21:23:39 -47
970401 22:54:32 -52
time: ET = TT
alt: seen from Ouda, Japan (always below horizon from here ;_;)
Mattiazzo's eclipse observation (vsnet-obs 5368) agrees with this ephemeris
within 1 min. Congratulations! The observed long duration of the eclipse
(12 min) and the shallow depth (0.5 mag) suggest that the accretion disk has
largely expanded. Please watch closely how it evolves!
Regards,
Taichi Kato