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USPS Star Calendar for 26 February-3 March 19 February 2012

Posted by amedalen in February 2012, March 2012.
Tags: , , , , , , ,

26 Feb    Jupiter is less than 2 finger-widths to the moon’s left tonight. Less than 20 percent of the moon’s surface is illuminated.

27 Feb    Jupiter, Venus and the moon line up again tonight. The moon is on top, with Jupiter 1 fist-width below and Venus a little more than one fist-width beyond Jupiter. About 25 percent of the moon’s surface is illuminated. The moon is at apogee, 63.47 Earth-radii, 405,000 kilometers, away.

28 Feb    The Pleiades Cluster is less than 2 finger-widths to the moon’s upper right tonight.

29 Feb    Leap day. Aldebaran is 2 finger-widths to the moon’s lower left tonight. Orion is farther left.

1 Mar    High in the west at midnight, Aldebaran is a little more than 1 fist-width to the moon’s lower right with Orion to the lower left. The Gemini Twins are far to the upper left.

2 Mar    At dusk, look for Aldebaran far to the right or upper right of the moon. Orion is to the lower right and the Gemini Twins are to the left or lower left. The bright star 2½ fist-widths to the moon’s lower left is magnitude 0.5 Procyon.

3 Mar    Now’s a good time to begin watching Venus and Jupiter every evening. Tonight they are less than 1 fist-width apart with Jupiter to the upper left of Venus.


1. George Dellas - 19 February 2012

Can you please put distance measurements in miles instead of kilometers?

amedalen - 20 February 2012

Thanks for your question.
Generally, metric units are used for astronomical measurements. Everyone has heard the term Light Year. This is the distance light travels in a vacuum in one Julian year. There is also the less well known unit of measurement, the Parsec (PC) which is the the approximate distance to the nearest star, about 3.26 light years. Closer to home we us AU, Astronomical Unit, the average distance between the earth and sun. Measuring the distance from earth to moon, we use earth-radii or meters. One earth-radii is 6378 km. If you wish to know the distances in miles, simply multiply earth-radii by 3906 or meters by 0.621.
Arnold Medalen

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