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.

–-----

That being said, opinions expressed on this website are my own and not that of NASA or JPL


Ephemeris Radio Schedule Monday - Friday

Ephemeris air times (ET)

6:19 & 8:19 a.m. - News stations

7 a.m.- Classical stations

The Stations of Interlochen Public Radio

Classical:

WIAA 88.7 FM Interlochen
94.7 FM Traverse City

WIAB 88.5 FM Mackinaw City

News:

WICA 91.5, FM Traverse City

WLNM 89.7 FM Manistee

WHBP 90.1 FM Harbor Springs, Petoskey


Observing Weather in Northwestern Lower Michigan

Clear Sky Chart from Attilla Danko
NWS Traverse City Forecast.
Gaylord, MI Weather Radar.
Satellite Infrared Loop.
Canadian based Infrared Satellite (Michigan shows best in the Eastern Canada view)
GOES-East - Sector Views: Great Lakes - GeoColor

On this site – articles of interest for this month

A Hairy Constellation or a Tale of Two Clusters

The Spring Cat - Leo

Looking Out

South Spring Skies

Exploring Spring Deep Sky Objects

The Skies of Spring (Spring constellations)


April 2019

Interested in learning more? If you live in northwestern lower Michigan check out the Grand Traverse Astronomical Society.

More information on visible planetary and other events are available on Bob Moler's Ephemeris Blog the day of the event. The blog contains Monday-Friday program transcripts, most with illustrations and additional information.

New Links: I dug through the IPR web archives and found these:

Bob Moler looks back at 40 years of 'Ephemeris'

I’m interviewed about all things astronomical prior to the August 21, 2017 eclipse. Photo, text, and audio.

Extra! My report on the Great American Eclipse. New: Added animated GIF of the sky at the totally eclipsed Sun, watching the shadow pass over.

Highlights for April 2019 (ET)

    Date   Local   Event
          Time    
Apr 1 Mo          Venus: 34.6° W
    2 Tu 12:17 am Moon-Venus: 3° N
    2 Tu  7:01 pm Moon-Mercury: 4° N
    5 Fr  4:50 am New Moon
    9 Tu  2:40 am Moon-Mars: 5° N
    9 Tu 11:43 am Moon-Aldebaran: 2.2° S
   11 Th  2:59 pm Mercury Elongation: 27.7° W (Not favorable for us)
   11 Th  7:59 pm Moon North Dec.: 22° N
   12 Fr  2:08 pm Moon Ascending Node
   12 Fr  3:06 pm First Quarter
   13 Sa  4:12 pm Moon-Beehive: 0.2° N
   14 Su  8:08 pm Mars-Aldebaran: 6.5° N
   15 Mo  4:22 am Moon-Regulus: 2.7° S
   16 Tu  2:03 pm Mercury-Venus: 4.3° N
   16 Tu  6:02 pm Moon Perigee: 364200 km
   19 Fr  7:12 am Full Moon
   22 Mo  7:58 pm Lyrid Shower: ZHR = 20
   22 Mo  8:06 pm Uranus Conjunction with the Sun
   23 Tu  7:36 am Moon-Jupiter: 1.8° S
   24 We  5:22 pm Moon South Dec.: 22.1° S
   25 Th 10:38 am Moon-Saturn: 0.4° N
   25 Th 11:02 am Moon Descending Node
   26 Fr  6:18 pm Last Quarter
   28 Su  2:20 pm Moon Apogee: 404600 km
May 1 We          Venus: 27.8° W

NASA - SKYCAL - Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA's GSFC) (with occasional annotations and additions) It can also generate in a calendar page format.








Active Planetary Space Missions

We have a new location for information on planetary space missions. It's here at the Planetary Society. The chart is created by Olaf Frohn, and is updated every month.

Free Software

Stellarium is a fabulous planetarium program with a very realistic sky and simple controls.

They've added some features in the latest version (0.18.3) and and a new rendering engine that may not be compatible with computers more than a year or two old without using command line options. See the Stellarium User Guide (pdf) under Command Line Options for options to try. My older laptop requires -a. https://stellarium.org.

There’s also a web based version of Stellarium. It’s pretty much bare bones, but works much like the computer version. It’s located here: https://stellarium-web.org.

Cartes du Ciel (Sky Charts) is a great telescope companion. It can be downloaded from http://astrosurf.com/astropc/.

Virtual Moon Atlas is a great tool for reference at the telescope or desk. http://www.astrosurf.com/avl/UK_index.html.

Celestia is a great 3D simulator of solar system objects and beyond. http://www.shatters.net/celestia/

Hallo Northern Sky is an interesting planetarium program. It seems not as polished as Stellarium, but has some cool features. I use it when planning star parties as a quick way to see what would be visible because it loads quickly http://hnsky.org/


Years on the air: 43

Years on the Internet: 23



Email: bob@bjmoler.org

Updated: 04/02/19