Please send the specific type of request as outlined below via email to the address listed on our contact page, and include "CRF WDS" in the subject line to ensure it is properly routed.

Observing List Request

If you would like to have an observing list custom made to your specifications please include that data in your email. Pertinent data includes what portion of the sky you can observe (RA and Dec limits), what separation you can observe (lower and upper limits), and what magnitudes are observable by you (both primary, secondary, and delta-mag). In addition, if no magnitude information is provided should we include the selected object? Also, do you wish to observe infrequently observed (N = ?) objects, or those which have not been observed for a long time (DATE = ?)? Please make the subject line: "CRF WDS Observing List Request".

Data Request

If you would like additional information on a particular double star system from the Observation Catalog please provide the following information, either WDS designation or discovery designation. Please make the subject line: "CRF WDS Data Request".

Comment Form

If you would like to suggest changes to the WDS format, or other information that you think we should provide, please send them to us with an email with the subject line: "CRF WDS Comment" to the email address above. Also, if you have published double star data, please check that we have all your publications in our Reference Listing