[AZ-Observing] Re: Rapid motion binary stars
- From: "Steve Coe" <stevecoe@xxxxxxxxx>
- To: <az-observing@xxxxxxxxxxxxx>
- Date: Wed, 22 Mar 2006 13:45:17 -0700
Brian;
I hate it when you are right;-)
Yep, I can see how "opening until the year 2122" is not very useful.
Well, let me look it over and see what I can come up with at this point, I
guess, like you said, I can consistently pick 10 years from now and supply
that data point from the Excel calculation.
All it takes is time;
Steve
-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx
[mailto:az-observing-bounce@xxxxxxxxxxxxx] On Behalf Of Brian Skiff
Sent: Wednesday, March 22, 2006 12:27 PM
To: az-observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] Re: Rapid motion binary stars
gamma Vir has already passed periastron, and is widening out.
The orbit quoted by Steve is incorrect, and there was a later one
(but published before it closed in) that had it right (periastron
was last April or May).
More generally, I'm not sure quoting ranges that extend out a century
or more are all that relevant to a list like Steve's. Not only are
such long-period orbits likely to be wrong, but what I would want as
an observer is simply two ephemeris points: one for "now" and another
one maybe 10 years downstream (maybe 5 if it's really moving, which
probably none besides gamma Vir will be).
\Brian
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