Comet 2020 F3 (NEOWISE) and Venus-Hyades Transit – Follow up

General location of the comet

   Here are pictures of the inner planet Venus in transit across the Hyades open star cluster, and of Comet 2020 F3 (NEOWISE) as both appeared over the northeastern to eastern horizon.
   Pictures were taken around 5:00 am CDT with a Canon Rebel EOS T7i DSLR using a variety of settings for exposure, shutter speed and so on. Location was near a baseball field at Legacy Park in Lee’s Summit, MO.
   
   
   
   
   
   



   
   
   

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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).

   
   
   

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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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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Earth at aphelion – 2020

   Saturday July 4th, as the Earth continues its annual trek around the Sun, the Earth reaches a point in its orbit that is called aphelion. Aphelion is the greatest distance that separates the Earth from the Sun, and we are the furthest from the Sun for the year at this point in the orbit. So, at 12 UT (7 am CDT) on Saturday July 4th the Earth is 1.0167 AU (94,507,635 miles, 152,095,295 km) from the Sun.
   Approximately one-half year or one-half revolution earlier, on January 5th 2020, the Earth was at perihelion, its minimum distance from the Sun for this year at 0.9832 AU (91,398,199 miles : 147,091,144 km). This difference, about 3%, in distances is due to the shape of the Earth’s orbit being elliptical rather than circular. However the Earth has a mildly elliptically shaped orbit that is closer to being slightly out-of-round than the incorrect, very elliptical orbit that is often shown – like the illustration used here.
sun2014-ani   In Astronomy the shape of a planet’s orbit is called eccentricity, with 0 being a circle and 1 a straight line. Any value between 0 and 1 represents an ellipse. The shape of the Earth’s orbit is so close to being circular that the apparent size of the Sun does not appear to change as this animated graphic shows. The difference between perihelion and aphelion is about 3%.

   
   
   
   Eccentricity for each planet is listed below for comparison.

Planet	   Eccentricity	
Mercury	   0.2056
Venus	   0.0068
Earth	   0.0167
Mars	   0.0934
Jupiter	   0.0484
Saturn	   0.0542
Uranus	   0.0472
Neptune	   0.0086
Pluto	   0.2488

   To read more about the Earth’s orbit and get some teaching ideas click here to download a PDF copy of my January 2011 Scope on the Skies column Solar Explorations.
   

   
   
   

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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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.

   
   
   

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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Sun Not Really In Cancer

   According to the pseudoscience of astrology the Sun enters the constellation of Cancer the Crab on Sunday June 21st at 9 UT (4 am CDT). When in fact the actual position of the Sun on this date is still within the boundary of the constellation of Taurus the Bull, but by very little. The Sun is very close to the eastern boundary for Taurus and the western boundary for the Gemini Twins, as this graphic and the banner graphic at the top of the page shows.
   Interestingly the June solstice was yesterday
   Read a little more about how astrology has the Sun incorrectly placed in a previous blog, and in another blog discussing the effects of precession.
   
   
   
   

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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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.

   
   
   

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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Starlink 13 This Morning

   This set of Starlink satellites, number 13, was launched a few days ago, June 13th, and the stream of satellites passed over my location in western Missouri early this morning. The stream, SpaceX’s 9th launch, consisted of 58 Starlink satellites, and 3 SkySat Planet Satellites (Hi-res Earth surface pictures) following a path from the southwest to the northeast. The stream went past the bright star Vega in the constellation Lyra the Harp. Apparent magnitude was at least 2nd as they appeared at least as bright as the stars of the Big Dipper (1st – 2nd apparent magnitudes), but not as bright as Vega (0.0 apparent magnitude).
   The two pictures below are time-exposures, and I processed them into black and white and made some contrast adjustments. The camera lens was centered around the ‘Summer Triangle’ and aimed nearly straight overhead toward the west.
   My personal challenge is to find a camera setting or video setting to capture the stream as individual ‘dots’.
Stay tuned!
   Keep up with viewing Starlink, the ISS, and many other satellites by checking with the Heavens Above web site or cellphone App. Note: the link is set for my latitude and longitude. This may be changed to your location at the Heavens Above web site.


   
   
   

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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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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June Moon at Descending Node

   Saturday June 6th the 14.7-day old waning 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 waning gibbous Moon will be just getting ready to set about an hour or so before sunrise. To the east are three of the visible planets, Jupiter, Saturn, Mars. Dwarf Planet Ceres, and Neptune are also part of the line-up along the ecliptic, but both have apparent magnitudes too dim to be naked-eye visible.

   
   
   
   
   

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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