HI Pat,
This is of great interest to me as well; it doesn't seem as easy as it might
sound. The easiest way to estimate distance is via the recession velocity,
divided by the hubble constant. You have probably tried this, right? It is
only a rough guess given the uncertainty in both RV and H-nought, and is
only good assuming the velocity is high enough to make simple relative
motion a minimal contribution (?how high, maybe over 1000km/sec).
I am looking forward to hearing other's posts on this subject!
-Don
Snohomish, WA
-----Original Message-----
From:
RevPJMadden@... [mailto:
RevPJMadden@...]
Sent: Sunday, March 10, 2002 12:36 PM
To:
guide-user@yahoogroups.com
Subject: [guide-user] Galaxy distances
Guide 8 is now up and running on my observatory computer. It is able to
use my USNO data stars, as well as the RealSky images (I have loaded 16 of
the 18 CDs onto the 80 GB hard drive--all but the region around the south
celestial pole). Having the USNO as well as the RealSky on the hard drive
greatly facilitates obtaining images to compare with the images I have just
taken while searching for supernovae. Guide 8 is a wonderful tool!
Sometimes I am curious as to how far away a given galaxy is. There is a
tremendous amount of data available when one right-clicks on a galaxy. But
I have not seen any distance estimates. I suspect that if I were more
astronomically literate, I could take some of the info that Guide provides,
and use it to get a "ballpark figure" on the distance. Can anyone out there
explain to me if it is possible to determine the approximate distance to a
galaxy using the data that Guide supplies? And if it is possible, what are
the steps?
Thanks, and clear skies to all!
Pat Madden
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