AAVSO Alert Notice 732 announces a campaign on the long period eclipsing binary ASASSN-21co. Please see the notice for details and observing instructions.
There are threads for this campaign under the following forums:
- Campaigns and Observation Reports: https://www.aavso.org/asassn-21-co-campaign
- Eclipsing Binaries: https://www.aavso.org/asassn-21-co-campaign-01
- Spectroscopy: https://www.aavso.org/asassn-21-co-campaign-02
Please subscribe to these threads if you are participating in the campaign so you can be updated by the astronomer and by HQ. Join in the discussion or ask questions there!
Many thanks, and Good observing,
Elizabeth O. Waagen, AAVSO HQ