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. Or download the Interlochen Public Radio app from the Apple App Store or Google Play.
Bob Moler's Ephemeris Blog contains scripts and illustrations for 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.
That being said, opinions expressed on this website are my own and not that of NASA or JPL
Ephemeris Radio Schedule Monday - Friday
WIAA 88.7 FM Caberfae
W234BU 94.7 FM Traverse City
WLNM 89.7 FM Manistee, Ludington
On this site – articles of interest for this month
Planetary Highlights for September 2021 (ET)
Date Time Event Sep 1 We Venus: 39.9° E 1 We 8:23 pm Moon North Dec.: 25.9° N 4 Sa 12:07 am Moon-Beehive: 3.1° S 5 Su 10:32 am Venus-Spica: 1.6° N 6 Mo 8:52 pm New Moon 9 Th 10:09 pm Moon-Venus: 4.1° S 11 Sa 6:06 am Moon Perigee: 368500 km 12 Su 12:35 pm Moon Descending Node 13 Mo 4:39 pm First Quarter 13 Mo 11:59 pm Mercury Elongation: 26.8° E 14 Tu 4:10 am Neptune Opposition 14 Tu 11:48 pm Moon South Dec.: 26° S 16 Th 10:37 pm Moon-Saturn: 3.9° N 18 Sa 2:50 am Moon-Jupiter: 4.1° N 20 Mo 7:55 pm Full Moon, Harvest Moon! 20 Mo 10:03 pm Mercury-Spica: 1.4° S 22 We 3:21 pm Autumnal Equinox 26 Su 3:33 am Moon Ascending Node 26 Su 5:44 pm Moon Apogee: 404600 km 28 Tu 9:57 pm Last Quarter 29 We 4:26 am Moon North Dec.: 26.1° N Oct 1 Fr Venus: 44.9° E
All event times are given for UTC-4:00: Eastern Daylight Saving Time.
Events Calendar by Fred Espenak and Sumit Dutta (NASA’s
If you go to the above site you can print out a list like the above for the entire year or calendar pages for your time zone.
Note that the site is now kept up for archival purposes. Fred Espenak retired from NASA several years ago and has his own site, AstroPixels, which contain much the same information: http://astropixels.com/almanac/almanac.html. However, he doesn’t adjust for Daylight Saving Time.
Years on the Internet: 26