Waning Crescent Moon and Open Star Clusters

   Sunday morning June 30th, before sunrise local time, look for a thin 27-day old waning crescent Moon to be close to the two open star clusters in Taurus the Bull, the Pleiades and the Hyades. The Pleiades are about 9-10o west, or above, the Moon, while the v-shaped Hyades and the Moon will all fit within the field of view of binoculars.

   
   
   

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Waning Crescent Moon Passes Uranus

   Thursday and Friday mornings before the Sun rises look toward the eastern horizon for the 24-day old waning crescent Moon to be within about 8-9o to the west from the outer ringed planet Uranus on Thursday the 27th, and about 7-8o from Uranus but now to the east on Friday the 28th.


   Uranus has an apparent magnitude 5.84 which technically makes it naked-eye visible (in dark skies) however nearby is the thin waning crescent Moon outshining Uranus with a -11.00 apparent magnitude. Worth mentioning but not naked eye visible is the outermost of the 8 planets, Neptune, with a 7.90 apparent magnitude.

   
   
   

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.


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Waning Crescent Moon – Venus Conjunction

   Saturday morning June 1st watch for a very thin 27.5-day old waning crescent Moon to rise with the inner plane Venus. The Moon will be about 5o from Venus, and despite the Moon’s thin appearance its apparent magnitude of -9.0 will still outshine Venus apparent magnitude of -3.80. Nonetheless both should make a striking pair over the horizon before sunrise local time.

   
   
   

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.


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Moon – Uranus Conjunction

   Friday May 31st the 26.5-day old waning crescent Moon will be within about 4o from the outer ringed planet Uranus. Both rise around 1 hour before sunrise local time. The waning crescent Moon and Uranus will easily fit within the field of view of binoculars.
   However with two distinctly different apparent magnitudes (Moon -10.0 and Uranus 6.80) seeing Uranus will be a challenge compared to the much brighter Moon. Even more dimmer is the dwarf planet Ceres (apparent magnitude 18.67) located about 11o west from the crescent 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.


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Waning Crescent Moon – Venus Conjunction

   Wednesday and Thursday mornings, May 1st and 2nd the 26 to 27-day old thin waning crescent Moon will pass by the inner planet Venus coming the closest on the 27th when the two will be separated by about 3-4o. A day later, Friday, the very thin waning crescent Moon will be near Mercury and the outer planet Uranus, but the Sun will be less than 45 minutes behind them – meaning the sky may be too bright to see the Moon or Mercury.
   Further to the west the outer planets Saturn and Jupiter are visible in the area around Sagittarius and Scorpius. Even a bit further west is the closest Dwarf Planet to the Earth, former asteroid 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.


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April Moon at 2nd Apogee

   Our Moon reaches apogee, (greatest distance from Earth), on Sunday April 28th. At that time the Moon will more or less be at a distance of 31.85 Earth diameters 251,392 miles (404,577 km) from the Earth.

Does our Moon actually go around the Earth? 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 apogee the 24-day old waning crescent Moon will be over the southeastern horizon 1-2 hours before sunrise local time.

*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.


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Moon – Venus, Mercury, Neptune – Triple Conjunction

   Tuesday April 2nd the 27-day old thin waning crescent Moon will join three planets, Mercury, Venus, and Neptune in a triple conjunction. All four will be grouped within an area about 8-10o across. This separation is slightly more than the field of view of 7×50 binoculars.
   The group of planets and our Moon have an interesting range of apparent magnitudes. The waning crescent Moon is -9.8, Venus -3.9, Mercury 0.82, and Neptune 7.95.

   
   
   

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.


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