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Archive for December, 2012

12/05/2012 – Ephemeris – Where are all the bright planets this week?

December 5, 2012 Comments off

Ephemeris for Wednesday, December 5th.  The sun will rise at 8:04.  It’ll be up for 8 hours and 58 minutes, setting at 5:02.   The moon, 1 day before last quarter, will rise at 12:03 tomorrow morning.

Let’s check out the planets for this week.  All 5 classical planets are visible now.  Mars can be seen low in the southwest.  Mars will set at 7:05.  The planetary action will have already picked up on the other side of the sky. Jupiter is located in the constellation of Taurus on the southeast in the evening.  It will transit or pass due south at 12:18 a.m, and will set at 7:51.  Saturn will be the next planet to rise at 4:48 a.m. in the east southeast.  Venus will rise at 5:44 and is below and left of Saturn.  Mercury will rise at 6:16 a.m.  Below and left of Venus.  A half an hour later it should be high enough to spot .  The three planets will appear in a straight line and nearly equally spaced.  After about a week, Mercury will not be visible again until next spring.

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

Addendum

Mars low in the southwest at 6:15 p.m. on December 5, 2012.

Mars low in the southwest at 6:15 p.m. on December 5, 2012. Created using Stellarium.

Jupiter and the winter stars at 9 p.m. on December 5, 2012.

Jupiter and the winter stars at 9 p.m. on December 5, 2012. Created using Stellarium.

Mercury animation starting December 4, 2012.

Mercury animation from December 4 to thru 12, 2012. Created using Stellarium

12/04/2012 – Ephemeris – Mercury in the morning

December 4, 2012 Comments off

Ephemeris for Tuesday, December 4th.  The sun will rise at 8:02.  It’ll be up for 8 hours and 59 minutes, setting at 5:02.   The moon, 2 days before last quarter, will rise at 10:59 this evening.

The planet Mercury has joined the morning planets for a week or so.  Mercury can be best spotted low in the east southeast starting about 7 a.m.  It will be below and slightly left of Venus, the brightest planet, about the same distance below as Saturn is above Venus.  They’re just about in straight line.  Binoculars will help in the search.  Once found Mercury may be tracked past 7:30.  Mercury will be visible for about a week as become somewhat brighter as it does.  That’s because Mercury’s phase at its half illuminated today at its greatest elongation from the sun.  It will be becoming more and more full as it moves around the sun mostly away from us now.  Mercury is a prise, few people have ever seen it.

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

Addendum

Mercury animation starting December 4, 2012.

Mercury animation starting December 4, 2012. Created using Stellarium

Note the passage of the moon on the mornings of the 10th and 11th.  The moon will actually be a thin crescent.

12/03/2012 – Ephemeris – Orion rising

December 3, 2012 2 comments

Ephemeris for Monday, December 3rd.  The sun will rise at 8:01.  It’ll be up for 9 hours and 1 minute, setting at 5:02.   The moon, 3 days before last quarter, will rise at 9:56 this evening.

Off in the southeast at 9 in the evening the great constellation of Orion will be seen now.  This is the most famous of all constellations world wide.  We think the Big Dipper is a big deal.  It’s not even a constellation, being the hind end of the great bear Ursa Major.  However it’s invisible if one travels far enough south of the equator.  Orion is now a rectangle of stars tilted to the left as he rises.  With three stars in a straight line in the center.  They are aligned nearly vertically.  Orion is a giant hunter.  The rectangle depict his shoulders and knees.  Among its other bright stars Orion contains two of the brightest.  The upper left star is the famous red giant star Betelgeuse.  The lower left star is the blue=white super giant Rigel.

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

Addendum

Orion rising at 9 p.m. December 3, 2012.

Orion rising at 9 p.m. December 3, 2012. Created using Stellarium.