Venus, the Bull, and a Comet (yes!)

   The next several days offer some exciting opportunities for viewing: a few of the visible planets; the waning phases of our Moon and a few conjunctions with stars and planets; Venus crossing the stars of the Hyades open star cluster; and Comet 2020 F3 (NEOWISE).
   Comet 2020 F3 (NEOWISE) is one of the many comets discovered by the NASA NEOWISE mission.
   NEOWISE is a space-based telescope used to find and track ‘Near Earth Objects’, comets and asteroids, that may pose a threat to our planet.
   Click on this link to go to the SkyLive web site for viewing information about Comet C/2020 F3 (NEOWISE).

   
   
   

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A Lunar Eclipse and 2 Planet Conjunction

   Our Moon reaches full phase on July 5th and will be rising around sunset local time. Two of the giant outer planets, Jupiter and Saturn will be passed by the Moon over a two day period. On the 5th the full Moon will be about 6-7o to the west from Jupiter. The next day, July 6th, the waning gibbous Moon will have passed the two planets and the Moon will about 1-2o from Saturn. Both days should prove to be ‘binocular-worthy’ with the morning of the 6th having the Moon the closest to the planets.
   There will also be a partial penumbral lunar eclipse however this type of eclipse has the Moon passing through the faint outer shadow cast by the Earth. Even a total penumbral lunar eclipse is barely noticeable so as a partial do not expect to see much change in the Moon’s brightness.

   
   
   

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July Moon at Descending Node

   Friday July 3rd the 11-day old waxing gibbous Moon crosses the plane of the ecliptic moving south. This is known as the descending node, one of two intersections the Moon’s orbital path (dark green line) has with the ecliptic.

   On the date of the descending node the waxing gibbous Moon will be over the southern horizon around local time for sunset. Look for the Moon to be about 9-10o from the heart of Scorpius the Scorpion, the reddish star Antares.

   
   
   
   
   

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Virgo Spikes the Moon

   Our Moon, after traversing the boundaries of the constellation Leo the Lion, will then do a similiar crossing of the constellation Virgo the Harvest Maiden. Roughly midway across Virgo is the bright blue-white star Spica. From mythologies the star Spica represents a harvested bundle of grasses, maybe wheat or oats.
   On the evening of June 28th the Moon will be about 7o to the west from Spica, and the next evening, June 29th the Moon will about 9-10o to the east from Spica.

   
   
   

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Leo and the Moon

   The next several evenings, as our Moon waxes through its phases, the Moon will pass by some familiar celestial objects – stars, star clusters, and planets. They all have something in common, that being that these objects are near the ecliptic. Our Moon follows the ecliptic in a more or less parallel path assuming that parallel paths may be bent! The Moon’s orbit is inclined or tilted about 6o from the ecliptic meaning that the Moon will at times be above, below, or on the ecliptic.
   So with the above in mind on the evenings of June 24th and 25th the 3 to 5-day old waxing crescent Moon will be passing by the heart of Leo the Lion, the bright star Regulus. As you can see from the graphic above Regulus lies nearly on the ecliptic.

   
   
   

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Thin Moon on the Move

   Sunday June 21st, on the other side of the Earth from the U.S.A., the new Moon will be passing between the Earth and the Sun giving that side of the world an annular solar eclipse.
   About 1/2-day later the just past new Moon, an 0.80-day young thin waxing crescent Moon may be seen just above the western horizon at sunset local time. If you see the Moon look closely for a star-like object just to the left from the Moon. This is the inner planet Mercury.
   If you miss the Moon and Mercury on Sunday evening wait until Monday evening June 22nd to see the still thin 1.85-days old waxing crescent Moon near one of the Gemini ‘Twin’ stars, Pollux.
   Not had enough? On Tuesday June 23rd the 2.80-days young waxing crescent Moon will be near M44, the Beehive Cluster.
   Any of these conjunctions will look great in binoculars.

   
   
   

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Crescent Moon – Venus Close Conjunction

   Friday morning June 19th about an hour before sunrise look toward the eastern horizon for the 27.5-day old waning crescent Moon and the inner planet Venus. The two will be separated by about 1-2o and both will easily fit within the field of view of binoculars making for a striking view.
   You will be looking at a Moon that is about 24-hours from new Moon phase, and shines with an apparent magnitude of -8.90 compared with Venus shining with a -4.29 apparent magnitude.
   Off to the west over the eastern-southern horizon are the outer planets, Uranus, Neptune, Mars, and Dwarf Planet Ceres. Further to the west are the planets Jupiter and Saturn.

   
   
   

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Moon – Mars/Neptune Conjunction

   Friday June 12th and Saturday June 13th before sunrise local time look toward the eastern horizon for the waning gibbous Moon to be near the planets Mars and Neptune. On both mornings the 20-22 day old Moon will be within about 7-9o from the two planets. Depending on your binoculars all three may fit within the field of view. However given the range of apparent magnitudes the reflected sunlight from Neptune (7.88) and possibly from Mars (-0.20) will be overshadowed by the much brighter Moon’s apparent magnitude (-12.0).


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2 Mornings – 2 Conjunctions

   Monday morning June 8th in the hours before sunrise look toward the western horizon for the 17-day old waning gibbous Moon to be within a few degrees from the outer planet Jupiter, and a bit further to the east the planet Saturn. With binoculars this conjunction could be followed for the next two mornings as the Moon will have moved to the other side of the two planets and closer to Saturn by Tuesday morning.


   
   
   
   


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Mars at Western Quadrature

orbital-positions   Saturday June 6th the position of the planet Mars, with respect to the Earth and the Sun, places this planet at what is called western quadrature. At that orbital position Mars, and actually any outer planet at their respective quadrature, is at a 90 degree angle from the Earth as this graphic shows, and the banner graphic at the top of the page shows. Think last quarter Moon as that is a fair comparison of the relative positions of Earth, Sun, and Mars. At this position Mars leads the Sun across the sky from east to west as the Earth is rotating, meaning that Mars rises before the Sun.

   Saturday morning finds Mars, Saturn, Jupiter, Dwarf Planet Ceres, Neptune, and the waning gibbous Moon spread across the morning skies from southeast to southwest.

   
   
   

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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