August Apogee Moon

   Our Moon reaches apogee, (greatest distance from Earth), for this orbit, on Saturday August 17th. At that time the Moon will be at a distance of 31.84 Earth diameters 251,954 miles (405,480 km) from the Earth.

   On the day of the apogee Moon the 17-day old waning gibbous Moon rises about 1 hour before midnight local time and sets later the following morning.

   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*
   *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.


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August Moon at Descending Node


   Monday August 12th the Moon will be crossing 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 day of the node crossing the 12.0-day old waxing gibbous Moon will be over the southern horizon and will be about 6-7o to the east from the ringed planet Saturn. Jupiter shines brightly further to the west near the reddish star Antares. With binoculars or telescope the dwarf planet Ceres may be 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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Moon-Spica Conjunction

   Monday evening August 5th the 5-day old waxing crescent Moon will be within about 5-6o from the blue-white star Spica over the southwestern horizon. Both will set shortly before midnight local time.
   Spica is part of the constellation Virgo the Harvest Maiden and represents a bundle of grasses, perhaps wheat, in her left hand.

   
   
   

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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August Moon at Perigee

   Our Moon reaches perigee, (closest distance to Earth), for this orbit, on Friday August 2nd. At that time the Moon will be at a distance of 28.175 Earth diameters, 223,319 miles (359,398 km) from the Earth.

   On the day of the perigee Moon the 2-day old thin waxing crescent Moon will be over the western horizon setting about 1 hour after the Sun sets.

   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*
   *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.


Also Follow me and other great resources at Feedspot.

July Moon at Descending Node and a Partial Lunar Eclipse

   Tuesday July 16th the Moon will be crossing 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 day of the node crossing the full Moon will be passing through the Earth’s shadow giving the part of the world where the Moon will be visible a 65% partial lunar eclipse. This will be a penumbral lunar eclipse during which the Moon passes through the fainter outer Earth’s shadow, the penumbra. However the Moon will be passing deeply into the penumbral shadow giving viewers an relatively dark penumbral eclipse lasting more than 2 hours.

   The full Moon rises shortly before midnight July 16th and is about 6-7o to the east from the ringed planet Saturn. The graphic shows how far the Moon has moved from the Earth’s shadow since the end of the Eclipse.

   So where will the eclipse be visible? Not from the U.S. of A. The table below shows eclipse times in UT and a quick conversion to my time zone, U.S.A. Central Daylight Time (CDT=UT-5) shows the eclipse begins at 1:43 pm CDT, maximum is at 4:30 pm CDT, and eclipse ends at 7:17 pm CDT – all times are before the Moon rises for my time zone as well as the rest of North America.

Penumbral eclipse begins: 18:43:53 UT
Partial eclipse begins: 20:01:43 UT
Maximum eclipse: 21:30:43 UT
Partial eclipse ends: 22:59:39 UT
Penumbral eclipse ends: 00:17:36 on 17 Jul UT

   
   
   
   
   

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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Pluto at 2019 Opposition

   Monday July 15th the Dwarf Planet Pluto will be at opposition. All outer planets and other solar system objects that orbit the Sun beyond the orbit of the Earth have opposition. At that orbital position the Earth is between the Sun and the outer solar system object, much like the Sun-Earth-Moon arrangement for a full Moon. At opposition the outer solar system object rises at the local time for sunset and sets at the local time for sunrise – again just like the full Moon.

   Where is Pluto and is Pluto visible to the naked eye? Pluto currently is a few degrees east from the handle of the teapot-shaped asterism for Sagittarius the Archer, and a few degrees east from Saturn. Pluto is visible, but with an apparent magnitude of 14.8 Pluto would only be visible with large aperture telescopes and with time-exposure pictures.

On July 14th 2015 the New Horizons spacecraft flew past the dwarf planet Pluto. Click here to learn more about the New Horizons mission and take part in the mission with some of the interactives created by NASA.

   
   
   
   
   
   
   
   

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.


Also Follow me and other great resources at Feedspot.

June Moon at Descending Node

   Wednesday June 19th the Moon will be crossing 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 day of the node crossing the 17.0-day old waning gibbous Moon will be over the southern horizon and will be about 13-14o to the east from the ringed planet 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.


Also Follow me and other great resources at Feedspot.