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[vsnet-chat 3766] Delta Scorpii ten year cycle.
- Date: Tue, 14 Nov 2000 22:15:45 -0300
- To: <vsnet-campaign-be@kusastro.kyoto-u.ac.jp>, <vsnet-chat@kusastro.kyoto-u.ac.jp>, <be-stars@mailbase.ac.uk>
- From: Sebastián Otero <varsao@fullzero.com.ar>
- Subject: [vsnet-chat 3766] Delta Scorpii ten year cycle.
- Cc: "AAVSO DISCUSSION" <aavso-discussion@informer2.cis.McMaster.CA>
- Sender: owner-vsnet-chat@kusastro.kyoto-u.ac.jp
Hi, all:
Gathering delta Scorpii's data, I realized that the only other
time when the star was measured brighter than normal (V= 2.21 instead of
2.32) was back in 1958.(Hogg A.R.). Taking the orbital period from Fabregat,
Reig and Tarasov (2000) P= 10.583 and the ephemeris from Hartkopf et al.,
(1996) To = 1979.41 , we find that another periastron passage had taken
place in 1958.24.
It is very interesting to find this, because it's a very good
indicator of the relation between the binary nature of the system and the
observed events.
Cheers,
Sebastian Otero,
LIADA,
Buenos Aires,
Argentina.
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