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.

A Night With the Lion

   Thursday evening April 6th and Friday morning April 7th the waxing gibbous Moon will rise and then set with Regulus, the brightest star in Leo the Lion. During the course of the night the Moon will pass within about 1o-2o from Regulus.

   Thursday evening April 6th, after sunset, look toward the west for a reddish appearing star. That is the planet Mars and about 2o to the east, left side, from Mars is Dwarf Planet Ceres, the closest of the dwarf planets. Not sure about Mars? Look for the Pleiades, an open star cluster with the brighter stars having a small dipper shape. Below the Pleiades is Mars.

   Thursday evening April 6th at sunset it may be possible to see the innermost planet Mercury in addition to seeing Mars and Jupiter, and at least with binoculars Dwarf Planet Ceres.

   
   
   

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.

Taurus Takes It On The Chin!


   Friday evening March 31st the 4-day old waxing crescent Moon will be about 4o from the reddish star Aldebaran in the open star cluster The Hyades. This open star cluster has a noticeable v-shape and from mythology the v-shape is the face of Taurus the Bull. Over the course of several hours as the Moon continues moving eastward along its orbit the Moon will pass across the v-shape and will be less than one-half degree from Aldebaran.
   
   
   
click on animated graphic to see it larger
   From my longitude this part of the sky will have set but observers in parts of north Africa, India, and that part of the world may be able to see an occultation of Aldebaran by the Moon. This animated graphic shows the Moon’s motion from 9 pm CDT 31 March to 5 am CDT 1 April (2 UT 1 April to 9 UT 1 April).
   
   
   
   
   

   The point of the v-shape is the bull’s nose while the two stars at the open end, Aldebaran and Epsilon Taurus mark the bull’s eyes. To the right, west, from the Moon is another open star cluster The Pleiades.

   
   
   

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.

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.

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.

ISS Last Night

   Last evening was my first opportunity to see the ISS in at least a month so I quickly set up my camera aiming it toward Venus and Mars. However my aim was off by quite a bit so I hurriedly readjusted the camera, 3 times, to capture these pictures. All were taken with ISO 800; F5; 18mm; 2.5 second. Pictures were stacked, merged, using Starstax.

   
   
   

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.