Home > Ephemeris Program, Occultation > 04/08/2016 – Ephemeris – Daytime occultation of Aldebaran Sunday the 10th

04/08/2016 – Ephemeris – Daytime occultation of Aldebaran Sunday the 10th

April 8, 2016

Apr 8.  This is Bob Moler with Ephemeris for Friday, April 8th.  The Sun will rise at 7:09.  It’ll be up for 13 hours and 9 minutes, setting at 8:19.   The Moon, 1 day past new, will set at 10:03 this evening.

The Moon will pass in front of the bright star Aldebaran Sunday evening.  However it will still be daylight out.  So this will be a challenge for the observer with binoculars, or better yet, telescope.  The moon will appear as a washed out crescent in the blue sky.  It will require an exceptionally clear sky to see Aldebaran, which once the Sun sets will appear just below the Moon and is part of the Face of Taurus the bull.  For the IPR listening area Aldebaran will disappear at the Moon’s dark upper left edge at 6:29 p.m. plus or minus a minute, depending on your location.  The star will reappear at 7:38 p.m., give or take a minute, on the right edge of the Moon, just below the dark oval of the Sea of Crises.  This is second of 4 Aldebaran occultations visible from here this year.

Times are for the Traverse City/Interlochen area of Michigan. They may be different for your location.


Ingress: 6:29 p.m.


Aldebaran ingress at approximately 6:29 p.m. April 10, 2016. Created using Stellarium.

Egress: 7:38 p.m.


Aldebaran egress at approximately 7:38 p.m. April 10, 2016. Created using Stellarium.

Occultation Visibility Map

Occultation path

Occultation Map for Aldebaran. Bright outline of occultation path is where it occurs at night. Credit IOTA program Occult 4.

Aldebaran will most likely need a telescope to spot once the Moon is located. The representations above via Stellarium will show the star as being too bright. It will be quite dim in relation to the sky brightness. The Moon too will be washed out. Start searching before the occultation start to make sure the star can be located. Even a little haze will make seeing the event impossible.

The actual time of the ingress and egress will vary by several minutes depending on your location in Michigan. Stellarium or other planetarium programs can be used to predict the timings to within a minute. IOTA the http://www.lunar-occultations.com/iota/iotandx.htm has a free Windows program Occult 4 which will give accurate occultation and transit of Mercury predictions.

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