[AZ-Observing] Re: Rapid motion binary stars

OK, Jack, et al;

Zeta Aqr   Slowly opening until 2263; then sep 6.4'' ; PA 106 deg
           Now--2.3'' ; PA 183 deg

Yes, the double star list for a SAC award also needs an updating.  Once =
this
larger version exists in its "final" form, we can do that pretty =
quickly.

Steve Coe


-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx
[mailto:az-observing-bounce@xxxxxxxxxxxxx] On Behalf Of Jack Jones
Sent: Tuesday, March 21, 2006 11:07 PM
To: az-observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] Re: Rapid motion binary stars

Hi Steve,

Did you check zeta Aqr? I have PA of 180, shows 249 in DS list v.1 =
(1990).

Jack=20


>Howdy all;
=20

I am working on an update of the SAC double star database and need some
double checking, please.  I have used Brian Workman's double star =
calculator
Excel spreadsheet program to determine the motion in the future of some
famous doubles.  I know that a few of you use the program to determine =
the
orbit of stars, would you please check these and make certain that the =
notes
I have written are accurate.

=20

The motivation here is that the old SAC double star data was rarely =
used.
So, instead of creating a huge database of over 10,000 stars by paring =
down
the WDS, we decided to put together some smaller lists from people who =
enjoy
doubles and have created smaller lists that we could combine.  That is =
the
plan.

=20

We have used the SAC double star list, the Mullaney and McCall articles =
from
sky and Tell, and several other lists to create a database of over 1500
multiple stars at this point.

=20

So, take a look at these and see if you agree with what I have written.  =


=20

Thanks for your time and effort;

Steve Coe

=20

=20

Eta Cas  Opening until 2127; then sep 14.8'' ;  PA 5.6

          Now--sep 13.1'' ;  320 deg PA

=20

Iota Leo  Opening until 2064; then sep 2.7'' ; PA 70

           Now--sep 1.9'' ;  109 deg PA

=20

Gamma Vir  Closing until 2008; then sep 0.4'';  PA 109; rapid opening =
after
2008

           Now--sep 0.6'';  209 deg PA

=20

78 UMa    Closing until 2027; then sep 0.4'';  PA 196 deg; slow opening
after 2027=20

         Now--sep 1.4'';  89.7 deg PA

=20

44 Boo   Opening until 2007; Closest in 2034; then sep 0.26''

         Now--sep 2.4'';  55.7 deg PA

=20

Lambda OPH  Opening until 2008; little change in separation; PA 36 deg

            Now--1.6'' ; 35 deg

=20

Zeta Her   Opening until 2024; then sep 1.6'' ; PA 87 deg

            Now--1.1'' ; 210 deg

=20

mu Dra   Opening until 2262; then sep 5.7'' ; PA 273 deg

         Now--2.3'' ; 10 deg

=20

70 Oph   Opening until 2024; then sep 6.7'' ; PA 118 deg

        Now--5.2'' ; 136 deg

=20

Alpha Psc  Closing until 2109; then sep 0.7'' ; PA 140 deg

          Now--1.8'' ; 267 deg

=20

Sirius   Opening until 2026; then 11'' ; PA 57 deg

        Now--7.4'' ; 104 deg

=20

Alpha Cen  Closing to 2038; then 1.8'' ; PA 95 deg

          Now--9.4''; 233 deg

=20


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please=20
send personal replies to the author, not the list.



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