Wednesday, July 4, 2012

Moon approaches Jupiter and Venus...again!

Event Date: July 14th
Time: 5:00 AM


Brief

   Last month, I did a 3-part series of Venus, Jupiter and the Moon when the latter was approaching the planets.  The three had an attractive grouping June 17th in a binocular field, talked about here (show link).  Over the next 24 hours, we can enjoy watching the Moon approach Venus, Jupiter and the Hyades cluster again.  The good part about watching them all this time, is that the Sun is further out of the way; Venus and Jupiter have risen 4 minutes earlier each day while the Sun has risen several seconds later on average each day.  As a result of this, as mentioned yesterday, we get to see the grouping at a better altitude during twilight, and even better, in dark skies earlier than that, albeit low in the sky.
   The image here is similar to yesterday's first one, showing how the Moon has waned a little more and now closer to the planets.  This time also, I included the Moon's orbit.
click on images to enlarge: courtesy of Starry Night Pro Plus, version 6.4.3, by Simulation Curriculum Corp.

Detailed

Look where Jupiter is in relation to the Moon's orbit: in the way, so to speak!  As seen on the other side of the world, which is where the Moon will be seen when the it reaches Jupiter's spot in the sky, there will be an occultation.  This will be the case for the next few times that the Moon meets with Jupiter, until our satellite's orbit moves it north or south of the giant planet; that, and/or it changes enough in ecliptic latitude.  For us in North America, we will miss the occultation as the two will be below the horizon.  When they rise, the Moon will have already moved further east of Jupiter.  However, we are in for another fun grouping of the two with Venus and the Hyades!  See tomorrow's entry for more on a very neat grouping.

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