|Stars Processed||Total Time||% Cleansed|
|315 of 744||1d 05h 00m||42.3%|
I'm currently updating Paul Couteau's double star list from his 1978 book Observing Double Stars in order to create a catalog of doubles for use with planetarium programs. The first catalog is going to be for Planetarium for the Palm (PftP).
Couteau's catalog contains 744 doubles in order of right ascension. Updating the list involves updating his entries with current information from the Washington Double Star Catalog (WDS).
The process involves confirming the data on Couteau's list and linking this data to an Excel version of the WDS. I make use of SIMBAD and various desktop planetaria (Cartes du Ciel & SkyMap Pro) to help with the confirmation process.
After analyzing 130 stars I've found 5 stars needing an update to Couteau's designation. Each star takes approximately 5 minutes to update. Total time for updating the list will take at least 70 hours.
To Couteau's original I will be adding the Aitken Double Star (ADS) number, coordinates for epoch 2000.0 with the addition of a difficulty index for star separations between 1 and 10 arc seconds derived from pLadic for the Palm. The magnitudes, position angles and separations will also be updated.
I'm looking for a way to group the doubles into subsets i.e. by separation or by difficulty index in order to keep the lists short. Some subsets I'm thinking of are:• doubles visible in a 3" refractor
• doubles visible with mounted binoculars
• doubles visible with a 10" reflector
Viewing a sample of these stars with various optics will help clarify which stars belong with which lists.
Here are some screen shots for PftP with data pulled from the updated Couteau Double Star list. The star shown is 59 Andromedae — separation 16.5" / mag. 6.1 & 6.7. This double should be viewable with at least 10x binoculars.The 1st screen shot shows the Object Information for 59 And. The 2nd screen shot displays a wide-field star chart highlighting the target star.
From Observing Double Stars by P. Couteau:Retain for updated database.
Verify with Washington Double Star (WDS) Catalog.
Override with WDS details.
Additions to Couteau's list.
• Running numbers from 1 to 744
• Name of double star pair
• Bayer / Flamsteed name
• Coordinates for equinox 1950
• Visual magnitudes of the components
• Position angles to the nearest degree
• The corresponding year
• Difficulty Index
• Aitken Double Star (ADS) number
• Distance in light years