April Moon at Perigee

   The Moon reaches perigee, (minimum distance from Earth), this month on Friday March 3rd. At that time the Moon will more or less be at a distance of 28.17 Earth diameters (359,327 km or 223,275 miles) from the Earth.

   Does our Moon actually go around the Earth as this graphic shows? From our perspective on the Earth the Moon appears to circle around the Earth. However, in reality, the Moon orbits the Sun together with the Earth*

   On the day of the perigee Moon the 1.5-day young thin waxing crescent Moon is above the western horizon at sunset local time and is near Dwarf Planet Ceres and the Pleiades open star cluster.

   *Click here to read my 2006 Scope on the Sky column “The Real Shape of the Moon’s Orbit”. (PDF)

   Read this very informative article about the Earth-Moon system and their orbital motions, written by Joe Hanson. “Do We Orbit the Moon?”

   
   
   

Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to go to bobs-spaces.

Crescent Moon Near Venus

   Sunday morning April 23rd the thin 26-day old waning crescent Moon will rise to right, west, from the inner planet Venus. The two will be about 6o apart and will easily fit within the field of view of 7×50 binoculars.

   
   
   

Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to return to bobs-spaces.

March Moon at Perigee #2


   The Moon reaches perigee for the second time, (minimum distance from Earth), this month on Thursday March 30th. At that time the Moon will more or less be at a distance of 28.5 Earth diameters (363,853 km or 226,088 miles) from the Earth.
   Does our Moon actually go around the Earth as this graphic shows? From our perspective on the Earth the Moon appears to circle around the Earth. However, in reality, the Moon orbits the Sun together with the Earth*
   On the day of the perigee Moon the 3-day old waxing crescent Moon is over the western horizon at sunset local time, above to the left from Mars, and Mars sets a few hours after the Sun sets.

   *Click here to read my 2006 Scope on the Sky column “The Real Shape of the Moon’s Orbit”. (PDF)

   Read this very informative article about the Earth-Moon system and their orbital motions, written by Joe Hanson. “Do We Orbit the Moon?”

   
   
   

Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to go to bobs-spaces.

See A Very Young Moon


   Tuesday evening and Wednesday evening March 28th and 29th there will be opportunities to observe a young and thin waxing crescent Moon. Tuesday as the thin waxing crescent Moon sets it will be approximately 0.94 day young. The following evening, Wednesday, the setting Moon will be approximately 1.94 days young.

   
   
   

Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to return to bobs-spaces.

A Lunar Conjunction with a Dwarf Planet


   Thursday evening March 2nd watch for the 4.5-day young waxing crescent Moon to be about 2o away from Dwarf Planet Ceres. Seeing Ceres with an apparent magnitude of around 8 may be difficult when the Moon is this close, especially using binoculars. 2march-tele
   However with a telescope Ceres should resolve into a small disc shape as this simulated view with a 25mm eyepiece on a 6″ reflector shows. There are two 6th magnitude stars on either side of Ceres that could be used as reference points for Ceres location if you are following the Dwarf Planet as it moves along its orbit.

   
   
   
   
   

Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to return to bobs-spaces.

Moon, Mars, and Uranus


   After sunset on Wednesday evening March 1st watch for the 3.5-day young waxing crescent Moon to be within about 5o from Mars and Uranus.

   
   
   

Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to return to bobs-spaces.

Crescent Moon, Venus, and Comet Encke


   Tuesday evening February 28th the 2.5-day young waxing crescent Moon will be about 9o from the inner planet Venus and about the same distance from Comet Encke (2P).
   Mars and Venus as well as three Dwarf Planets are also above the horizon at sunset local time as the graphic is showing.
   
   
   

Click here to go to the Qué tal in the Current Skies web site for monthly observing information, or here to return to bobs-spaces.