Summary: Dreyer Crater parents six satellites along eastern Mare Marginis in the equatorial latitudes of the far side portion of the northern hemisphere.
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| Detail of oblique view, obtained 1971 with 70mm Hasselblad camera during Apollo 14 mission, shows lunar far side’s Dreyer Crater (center left) with intrusive satellites Dreyer C (right; east) and Dreyer K (below; south-southeast); Dreyer D is east (right) of Dreyer C and south (below) of joined satellites Ginzel H (with bright east side) and Ginzel G; Dreyer J (lower left center) is next to Dreyer K; NASA ID AS14-71-9889: James Stuby (Jstuby), Public Domain (CC0 1.0), via Wikimedia Commons |
Dreyer Crater parents six satellites along eastern Mare Marginis (Sea of the Edge) as an equatorial-latitude crater system in the far side’s portion of the moon’s northern hemisphere.
Dreyer Crater is centered at 10.24 degrees north latitude, 97.09 degrees east longitude, according to the International
Astronomical Union’s (IAU) Gazetteer of Planetary Nomenclature. The northern hemisphere crater obtains its northernmost and southernmost latitudes at 11.29 degrees north and 9.18 degrees north, respectively. The eastern hemisphere crater’s easternmost and westernmost longitudes occur at 98.16 degrees east and 96.03 degrees east, respectively. Gill Crater’s diameter spans 63.84 kilometers.
Dreyer Crater parents six satellites on the lunar far side, just beyond the near side’s northeastern limb. Two of the Gill Crater system’s six satellites associate with their parent’s western side. Four of the Gill Crater system’s six craters are east-side residents.
Dreyer Crater lies along the eastern edge of Mare Marginis (Sea of the Edge). The equatorial-latitude lunar mare (Latin: mare, “sea”) wraps around the lunar near side’s northeastern limb in its occupancy of far side and near side portions of the moon’s eastern and northern hemispheres.
Dreyer R and Dreyer W associate with their parent’s western side. Dreyer R resides to the southwest of its parent. Dreyer R’s placement qualifies it as the most southerly and the most westerly of the Dreyer Crater system’s six satellites. Dreyer W lies to the northwest of its parent. Dreyer W’s placement qualifies it as the most northerly of the Dreyer Crater system’s six satellites.
Dreyer R is centered at 8.49 degrees north latitude, 94.48 degrees east longitude. Satellite R confines its northernmost and southernmost latitudes to 8.79 degrees north and 8.2 degrees north, respectively. It restricts its easternmost and westernmost longitudes to 94.78 degrees east and 94.17 degrees east, respectively. Dreyer R has a diameter of 18.08 kilometers.
Dreyer W is centered at 11.77 degrees north latitude, 95.8 degrees east longitude. It posts northernmost and southernmost latitudes of 12.28 degrees north and 11.26 degrees north, respectively. It marks its easternmost and westernmost longitudes at 96.32 degrees east and 95.28 degrees east, respectively. Dreyer W’s diameter spans 30.74 kilometers.
Dreyer C, Dreyer D, Dreyer J and Dreyer K claim locations associated with their parent’s eastern side. Dreyer C and Dreyer K intrude across their parent’s northeastern and southeastern borders, respectively. Dreyer D’s location to the east of Dreyer C qualifies it as the most easterly of the Dreyer Crater system’s six satellites. Dreyer J neighbors
along Dreyer K’s eastern side.
Dreyer C is centered at 11 degrees north latitude, 98.26 degrees east longitude. It records northernmost and southernmost latitudes of 11.59 degrees north and 10.42 degrees north, respectively. It registers easternmost and westernmost longitudes of 98.85 degrees east and 97.66 degrees east, respectively. Dreyer C’s diameter of 35.44 kilometers qualifies it as the largest of the Dreyer Crater system’s six satellites.
Dreyer D is centered at 10.71 degrees north latitude, 99.83 degrees east longitude. Its northernmost and southernmost latitudes are confined to 11.12 degrees north and 10.3 degrees north, respectively. Its easternmost and westernmost longitudes are restricted to 100.25 degrees east and 99.42 degrees east, respectively. Dreyer D’s diameter of 10.71 kilometers qualifies it as the smallest of the Dreyer Crater system’s six satellites.
Dreyer J is centered at 9.02 degrees north latitude, 98.52 degrees east longitude. Its northernmost and southernmost latitudes are found at 9.46 degrees north and 8.58 degrees north, respectively. Its easternmost and westernmost longitudes are posted at 98.97 degrees east and 98.07 degrees east, respectively. Dreyer J’s diameter measures 26.85
kilometers.
Dreyer K is centered at 9.24 degrees north latitude, 97.73 degrees east longitude. It narrows its northernmost and southernmost latitudes to 9.59 degrees north and 8.88 degrees north, respectively. It trims its easternmost and westernmost longitudes to 98.09 degrees east and 97.37 degrees east, respectively. Dreyer K’s diameter measures 21.56 kilometers.
The takeaways for Dreyer Crater’s parentage of six satellites along eastern Mare Marginis (Sea of the Edge) are that two satellites, Dreyer R and Dreyer W, lie to the west of their parent; that Dreyer C, Dreyer D, Dreyer J and Dreyer K
are east-side residents; that Dreyer C and Dreyer D qualify as the far side crater system’s largest and smallest satellites, respectively; that Dreyer W and Dreyer D qualify as the Dreyer Crater system’s most northerly and most
easterly satellites, respectively; and that outlying Dreyer R qualifies as the Dreyer Crater system’s most southerly and most westerly satellite.
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| Details of Lunar Astronautical Chart (LAC) 64 shows the lunar far side’s Dreyer Crater with its six satellites along the eastern edge of Mare Marginis (Sea of the Edge); courtesy NASA (National Aeronautics and Space Administration) / GSFC (Goddard Space Flight Center) / ASU (Arizona State University): Public Domain, via USGS Astrogeology Science Center / Gazetteer of Planetary Nomenclature |
Acknowledgment
My special thanks to talented artists and photographers/concerned organizations who make their fine images available on the internet.
Image credits:
Image credits:
Detail of oblique view, obtained 1971 with 70mm Hasselblad camera during Apollo 14 mission, shows lunar far side’s Dreyer Crater (center left) with intrusive satellites Dreyer C (right; east) and Dreyer K (below; south-southeast);
Dreyer D is east (right) of Dreyer C and south (below) of joined satellites Ginzel H (with bright east side) and Ginzel G; Dreyer J (lower left center) is next to Dreyer K; NASA ID AS14-71-9889: James Stuby (Jstuby), Public Domain (CC0 1.0), via Wikimedia Commons @ https://commons.wikimedia.org/wiki/File:Dreyer_crater_Ginzel_crater_AS14-71-9889.jpg
Details of Lunar Astronautical Chart (LAC) 64 shows the lunar far side’s Dreyer Crater with its six satellites along the eastern edge of Mare Marginis (Sea of the Edge); courtesy NASA (National Aeronautics and Space Administration) / GSFC (Goddard Space Flight Center) / ASU (Arizona State University): Public Domain, via USGS Astrogeology Science Center / Gazetteer of Planetary Nomenclature @ https://planetarynames.wr.usgs.gov/images/Lunar/lac_64_wac.pdf
For further information:
For further information:
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Available @ https://planetarynames.wr.usgs.gov/Feature/1638
Available @ https://planetarynames.wr.usgs.gov/Feature/1638
International Astronomical Union (IAU) / U.S. Geological Survey (USGS) Gazetteer of Planetary Nomenclature. “Dreyer C.” USGS Astrogeology Science Center > Gazetteer of Planetary Nomenclature > Nomenclature > The Moon. Last updated Oct. 18, 2010.
Available @ https://planetarynames.wr.usgs.gov/Feature/8828
Available @ https://planetarynames.wr.usgs.gov/Feature/8828
International Astronomical Union (IAU) / U.S. Geological Survey (USGS) Gazetteer of Planetary Nomenclature. “Dreyer D.” USGS Astrogeology Science Center > Gazetteer of Planetary Nomenclature > Nomenclature > The Moon. Last updated Oct. 18, 2010.
Available @ https://planetarynames.wr.usgs.gov/Feature/8829
Available @ https://planetarynames.wr.usgs.gov/Feature/8829
International Astronomical Union (IAU) / U.S. Geological Survey (USGS) Gazetteer of Planetary Nomenclature. “Dreyer J.” USGS Astrogeology Science Center > Gazetteer of Planetary Nomenclature > Nomenclature > The Moon. Last updated Oct. 18, 2010.
Available @ https://planetarynames.wr.usgs.gov/Feature/8830
Available @ https://planetarynames.wr.usgs.gov/Feature/8830
International Astronomical Union (IAU) / U.S. Geological Survey (USGS) Gazetteer of Planetary Nomenclature. “Dreyer K.” USGS Astrogeology Science Center > Gazetteer of Planetary Nomenclature > Nomenclature > The Moon. Last updated Oct. 18, 2010.
Available @ https://planetarynames.wr.usgs.gov/Feature/8831
Available @ https://planetarynames.wr.usgs.gov/Feature/8831
International Astronomical Union (IAU) / U.S. Geological Survey (USGS) Gazetteer of Planetary Nomenclature. “Dreyer R.” USGS Astrogeology Science Center > Gazetteer of Planetary Nomenclature > Nomenclature > The Moon. Last updated Oct. 18, 2010.
Available @ https://planetarynames.wr.usgs.gov/Feature/8832
Available @ https://planetarynames.wr.usgs.gov/Feature/8832
International Astronomical Union (IAU) / U.S. Geological Survey (USGS) Gazetteer of Planetary Nomenclature. “Dreyer W.” USGS Astrogeology Science Center > Gazetteer of Planetary Nomenclature > Nomenclature > The Moon. Last updated Oct. 18, 2010.
Available @ https://planetarynames.wr.usgs.gov/Feature/8833
Available @ https://planetarynames.wr.usgs.gov/Feature/8833
International Astronomical Union (IAU) / U.S. Geological Survey (USGS) Gazetteer of Planetary Nomenclature. “Target: The Moon.” USGS Astrogeology Science Center > Gazetteer of Planetary Nomenclature > Nomenclature > The Moon.
Available @ https://planetarynames.wr.usgs.gov/Page/MOON/target
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Available @ https://earth-and-space-news.blogspot.com/2013/01/dreyer-crater-honors-danish-british.html
Available @ https://earth-and-space-news.blogspot.com/2013/01/dreyer-crater-honors-danish-british.html
The Moon Wiki. “Dreyer.” The Moon > Lunar Features Alphabetically > D Nomenclature.
Available @ https://the-moon.us/wiki/Dreyer
Available @ https://the-moon.us/wiki/Dreyer
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Available @ https://the-moon.us/wiki/IAU_directions
Available @ https://the-moon.us/wiki/IAU_directions
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Available @ https://the-moon.us/wiki/Mare_Marginis
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