Alpha Draconis Thuban

GJP
Affiliation
American Association of Variable Star Observers (AAVSO)
Thu, 05/07/2020 - 01:59

When is the next Thuban & companion Eclipse: Date and Time??

Sebastian__Otero
VSX ephemeris

Hello Joe,
You can use VSX to get an ephemeris.
Go to the star's page:

https://www.aavso.org/vsx/index.php?view=detail.top&oid=45170

In the Epoch field you will find a link called "Ephemeris".
By clicking on it you will see a list of eclipses with their times in UT.
You will have the start, mideclipse and end of the eclipse times.

The next one is on:

03 Jun 2020 19:40
04 Jun 2020 03:41
04 Jun 2020 11:43

I hope it helps.

Cheers,
Sebastian
 

Tonisee
Affiliation
American Association of Variable Star Observers (AAVSO)
Sebastian, I looked at the

Sebastian, I looked at the VSX record of alp Dra and found that it's SDSS photometry refers most probably a different star.

Best regards,
Tõnis

Sebastian__Otero
SDSS saturated data

Hello Tõnis,
thanks for your comment. I deleted the SDSS photometry, it belongs to the correct star but SDSS saturates at mag 14 or so and then any information for a 4th mag. star is unseless.

Cheers,
Sebastian