This is the companion Web Site of Bob Moler's Ephemeris radio program, which is broadcast Monday Through Friday on Interlochen Public Radio Stations. Interlochen Public Radio serves northwestern lower Michigan. The first Ephemeris program was broadcast June 1, 1975.
Click on the above link for live streaming audio from IPR.
Bob Moler's Ephemeris Blog contains transcripts and illustrations from the Ephemeris programs. They are generally released at 12:01 a.m. Eastern Time on the program play date.
NASA/JPL Solar System Ambassador
Contact me at the email address at the bottom of this page to discuss star parties and presentations for schools, scout groups, and non-profit organizations.
Opinions expressed on this website are my own and not that of NASA or JPL
Ephemeris Radio Schedule Monday - Friday
88.7 FM Interlochen
On this site – articles of interest for this month
Highlights for December 2017 (ET)
Date Local Event Time Dec 01 Fr Venus: 9.4° W 03 Su 8:00 am Moon-Aldebaran: 0.8° S 03 Su 10:47 am Full Moon 04 Mo 3:42 am Moon Perigee: 357500 km 05 Tu 6:43 am Moon North Dec.: 20° N 07 Th 4:30 am Moon-Beehive: 2.5° N 07 Th 7:39 pm Moon Ascending Node 08 Fr 5:25 pm Moon-Regulus: 0.7° S 10 Su 2:51 am Last Quarter 12 Tu 8:40 pm Mercury Inferior Conjunction with the Sun 13 We 11:27 am Moon-Mars: 4.5° S 14 Th 1:07 am Geminid Meteor Shower: ZHR = 120! 14 Th 9:26 am Moon-Jupiter: 4.7° S 18 Mo 1:31 am New Moon 18 Mo 8:27 am Moon Apogee: 406600 km 19 Tu 4:31 am Moon South Dec.: 20.1° S 21 Th 11:29 am Winter Solstice 21 Th 3:18 pm Saturn Conjunction with the Sun 22 Fr 5:04 am Moon Descending Node 22 Fr 10:00 am Ursid Meteor Shower: ZHR = 10 Note: The Ursid radiant is near the Little Dipper’s bowl 26 Tu 4:20 am First Quarter 30 Sa 7:25 pm Moon-Aldebaran: 0.7° S Occultation Jan 01 Mo Venus: 1.9° W
NASA - SKYCAL - Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA's GSFC) (with occasional annotations)
Occultation of Aldebaran
Map of the area where the occultation of Aldebaran will be visible. Created using Occult 4 from IOTA.org.
For Traverse City/Interlochen the occultation will start at 6:17 p.m. EST December 30 and end at 7:16 p.m.
It will vary by a few minutes for northern lower Michigan. Otherwise use a planetarium program like Stellarium to preview the event. However, set the program for topocentric coordinates. In Stellarium that’s in the Configuration window, Tools Tab and check the Topocentric coordinates box. Topocentric coordinates are the apparent positions for your location on the Earth. For Cartes du Ciel (Sky Charts) The setting is under Setup/Solar System. So also make sure your location is correct. The geocentric conjunction of the two bodies will be December 31, 0:49.2 UTC, so it will occur after midnight on the night of December 31st for locations in northern Europe and Asia.
I’ll have more information on December 29th on my blog http://bobmoler.wordpress.com.
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