Uranus Sees Red!


   Sunday February 26th the ‘Red Planet’ Mars will be about 0.5o from the outer planet Uranus. Mars has an apparent magnitude of 1.28 while the much larger but considerably more distant Uranus has an apparent magnitude of 5.88. Despite the large difference in magnitudes both planets should be visible as small dot shapes in binoculars and with even more detail through a telescope eyepiece.

   
   
   

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 and Saturn Conjunction


   Tuesday morning February 21st the 23.5-day old waning crescent Moon will be 4-5o away from the planet Saturn as this graphic shows. With 7×50 binoculars the two should make for a striking pair.

   
   
   

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.

February Apogee Moon

18mar-apogee_moon Our Moon reaches apogee, (greatest distance from Earth), on Saturday February 18th. At that time the Moon will more or less be at a distance of 31.70 Earth diameters (404,650 km or 251,438 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 as they both rotate around a common balance point, the barycenter.*

*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?”

   On the day of the apogee Moon the 21-day old last quarter Moon rises a couple of hours before the Sun and is visible over the southern horizon before sunrise.

   
   
   

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.

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.

The Moon, Jupiter, and Spica – Together Again


   Wednesday February 15th the 18-day old waning gibbous Moon will be within a few degrees from the planet Jupiter and the blue-white star Spica in Virgo the Harvest Maiden as they rise in the east a few hours before sunrise local time.
   All three will fit within the field of view of a pair of 7×50 binoculars as this graphic shows.

   
   
   
   
   
   
   
   
   
   
   
   

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.

February Moon at Ascending Node, a Penumbral Lunar Eclipse, and a Comet!

11feb-ascending-node   Saturday February 11th the full Moon will be crossing the plane of the ecliptic moving north relative to the ecliptic. This is known as the ascending node, one of two intersections the Moon’s orbital path has with the ecliptic. The ecliptic is actually the Earth’s orbit and the Moon’s orbit is inclined about 6o from the ecliptic, so there are two node intersections, the ascending and descending nodes.
   When a node crossing happens near the time of a full or new Moon there is a chance for an eclipse. The closer the two times are to each other the more centered the Moon will be with respect to the Sun for a total eclipse, or more centered such that the Moon passes through the inner and darker umbral shadow.
   That is the situation for this weekend with full Moon at 0:33 UT Saturday January 11th (6:30 pm CST Friday January 10th), and the node crossing at 19:50 UT (1:50 pm CST) Saturday. This time, due to the nearly 20 hour difference the Moon’s orbital path will take it across the Earth’s fainter outer, the penumbra. A penumbral lunar eclipse is not that easily noticeable because the bright reflected light from the Moon is not dimmed that much as the Moon passes through the penumbra.

   Click here to go to the Hermit Eclipse web site for more information about this eclipse.

   Adding to the viewing there is a good chance Comet 45P/Honda-Mrkos-Pajdusakova, aka the “Green Comet”, will be bright enough to be seen with binoculars over the next several evenings. On the 11th the comet will be at its closest to the Earth and may be brighter than 4th magnitude. Unfortunately the Moon’s reflected light will brighten the sky making it that much more challenging to see the comet. Click here to read an article about the comet at the EarthSky web site.

   Does our Moon actually go around the Earth as many graphics show? 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*

*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 return to bobs-spaces.

Moon Cruises Past Planets and Stars

feb5-bino
   Over the next several evenings the Moon, as it orbits toward the east and waxes from crescent to first quarter phase will pass by several planets, dwarf planets, and star clusters. On the evening of February 5th the Moon will be close to the reddish star Aldebaran, the ‘eye’ in the face of the angry bull, Taurus. This should make for a nice view with binoculars or low power eyepiece when the Moon will sort of overlay the stars of the open star cluster the Hyades.

   These two animated graphics show the sky as viewed from Quito Ecuador at 0o latitude, and my home latitude of approximately 40o North. They show the sky at one day intervals starting with February 1st and ending with February 5th.


   
   
   

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.