Earth and Space News: Near Side Jansky Crater Parents Three Satellites in Mare Marginis

Summary: Jansky Crater parents three satellites in Mare Marginis (Sea of the Edge), along the lunar near side's northeast limb.

View of eastern Mare Marginis shows, in foreground, Jansky Crater (lower left), Jansky satellites D, F and H (center) and Dreyer satellite R with two smaller unnamed craters (center right); image obtained in December 1972 during revolution 27 by Apollo 17's mapping camera, film magazine M; NASA ID AS17-M-0895: James Stuby (Jstuby), Public Domain (CC0 1.0), via Wikimedia Commons

Jansky Crater parents three satellites in Mare Marginis (Sea of the Edge), along the eastern limb in the lunar near side's northeastern quadrant.

Jansky Crater is centered at 8.63 degrees north latitude, 89.5 degrees east longitude, according to the International Astronomical Union’s (IAU) Gazetteer of Planetary Nomenclature. The parental crater's northernmost and southernmost latitudes stretch to 9.84 degrees north and 7.41 degrees north, respectively. Its easternmost and westernmost longitudes extend from 90.74 degrees east to 88.27 degrees east, respectively. Jansky Crater's diameter spans 73.77 kilometers.

All three of the Jansky Crater system's satellites occupy the terrain to the east of their parent. They fan out from their parent, with Jansky D and Jansky H as the fan's east-northeast and east-southeast guards, respectively.

Jansky D lies the closest to its parent. It is centered at 9.56 degrees north latitude, 91.25 degrees east longitude. The Jansky Crater system's northernmost satellite posts northernmost and southernmost latitudes of 9.91 degrees north and 9.24 degrees north, respectively. The irregularly shaped satellite marks its easternmost and westernmost longitudes at 91.63 degrees east and 90.87 degrees east, respectively. Jansky D has a diameter of 23.02 kilometers.

Jansky F neighbors to the near east south-east of Jansky D. The Moon-Wiki notes the presence of two dark halo craterlets (DHC) in the vicinity of Jansky F on Lunar Aeronautical Chart (LAC) 64. One dark halo craterlet is found in Mare Marginis, to the north-northeast of Jansky F, at 11 degrees 30 minutes north latitude, 93 degrees 30 minutes east longitude. Another dark halo craterlet is noted to the east-southeast of Jansky F.

Jansky F is centered at 8.94 degrees north latitude, 92.32 degrees east longitude. Jansky F's northernmost and southernmost latitudes reach 9.72 degrees north and 8.15 degrees north, respectively. The Jansky Crater system's easternmost satellite spreads its easternmost and westernmost longitudes from 93.11 degrees to 91.53 degrees east, respectively. Jansky F's diameter of 47.49 kilometers qualifies it as the largest of the Jansky Crater system's three satellites.

Jansky H's residence to the east-southeast of its parent and to the west-southwest of Jansky F qualify it as the most southerly of the Jansky Crater system's three satellites. Jansky H is centered at 7.71 degrees north latitude, 91.41 degrees east longitude. The circular satellite finds its northernmost and southernmost latitudes at 7.9 degrees north and 7.51 degrees north, respectively. It obtains easternmost and westernmost longitudes of 91.61 degrees east and 91.21 degrees east, respectively. Jansky H's diameter of 11.84 kilometers qualifies it as the Jansky Crater system's smallest satellite.

Dreyer R, the westernmost of the Dreyer Crater system's six satellites, resides to the east as the Jansky Crater system's nearest named neighbor. Dreyer R is centered at 8.49 degrees north latitude, 94.48 degrees east longitude. Its northernmost and southernmost latitudes are obtained at 8.79 degrees north and 8.2 degrees north, respectively. Its easternmost and westernmost longitudes are found at 94.78 degrees east and 94.17 degrees east, respectively. Dreyer Crater's diameter measures 18.08 kilometers.

The Jansky Crater system occupies the southern edge of eastern Mare Marginis (Sea of the Edge) in the lunar near side's northern low latitudes. The Sea of the Edge's name reflects its placement along the lunar near side's eastern limb. This location frustrates Earth-based skygazers with observational difficulties. Side-on views distort and hide details.

Mare Marginis is centered at 12.7 degrees north latitude, 86.52 degrees east longitude. The dark basaltic plain's northernmost and southernmost latitudes extend from 18.59 degrees north to 9.81 degrees north, respectively. The lunar mare's easternmost and westernmost longitudes touch 93.35 degrees east and 81.15 degrees east, respectively. Mare Marginis spans 357.63 kilometers.

The takeaways for the Jansky Crater system's parentage of three satellites in Mare Marginis are that all three satellites associate with the terrain to the east of their parent; that Jansky H qualifies as the smallest and as the most southerly of the Jansky Crater system's three satellites; that Jansky F ranks as the largest and the most easterly of the Jansky Crater system's three satellites; and that proximity to the lunar near side's eastern limb interferes with accurate, easy Earth-based observations of the Jansky Crater system.

Detail of Lunar Aeronautical Chart (LAC) 64 shows near side Jansky Crater system's parental crater and three satellites (Jansky D, F and H) in the southern Mare Marginis (Sea of the Edge); scale 1:1,000,000; Mercator Projection: United States Air Force (USAF) Aeronautical Chart and Information Center (ACIC) via USGS/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:

Consolmagno, Guy; and Dan M. Davis. Turn Left at Orion. Fourth edition. Cambridge UK; New York NY: Cambridge University Press, 2011.

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

International Astronomical Union (IAU) / U.S. Geological Survey (USGS) Gazetteer of Planetary Nomenclature. “Jansky.” USGS Astrogeology Science Center > Gazetteer of Planetary Nomenclature > Nomenclature > The Moon. Last updated Oct. 18, 2010.
Available @ https://planetarynames.wr.usgs.gov/Feature/2799

International Astronomical Union (IAU) / U.S. Geological Survey (USGS) Gazetteer of Planetary Nomenclature. “Jansky D.” USGS Astrogeology Science Center > Gazetteer of Planetary Nomenclature > Nomenclature > The Moon. Last updated Oct. 18, 2010.
Available @ https://planetarynames.wr.usgs.gov/Feature/10201

International Astronomical Union (IAU) / U.S. Geological Survey (USGS) Gazetteer of Planetary Nomenclature. “Jansky F.” USGS Astrogeology Science Center > Gazetteer of Planetary Nomenclature > Nomenclature > The Moon. Last updated Oct. 18, 2010.
Available @ https://planetarynames.wr.usgs.gov/Feature/10202

International Astronomical Union (IAU) / U.S. Geological Survey (USGS) Gazetteer of Planetary Nomenclature. “Jansky H.” USGS Astrogeology Science Center > Gazetteer of Planetary Nomenclature > Nomenclature > The Moon. Last updated Oct. 18, 2010.
Available @ https://planetarynames.wr.usgs.gov/Feature/10203

International Astronomical Union (IAU) / U.S. Geological Survey (USGS) Gazetteer of Planetary Nomenclature. “Mare Marginis.” USGS Astrogeology Science Center > Gazetteer of Planetary Nomenclature > Nomenclature > The Moon. Last updated Oct. 18, 2010.
Available @ https://planetarynames.wr.usgs.gov/Feature/3681

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

Levy, David H. Skywatching. Revised and updated. San Francisco CA: Fog City Press, 1994.

Lunar and Planetary Institute. "AAS17-M-0895." USRA (Universities Space Research Association) LPI (Lunar and Planetary Institute) > Resources > Apollo Image Atlas > Metric Image Catalog > Apollo 17 > Revolution 27 AS17-M-0829 to AS17-M-0961.
Available @ https://www.lpi.usra.edu/resources/apollo/frame/?AS08-17-2709

Marriner, Derdriu. "Aug. 31, 1932, Total Solar Eclipse Belongs to Saros Series 124." Earth and Space News. Wednesday, Sep. 1, 2021.
Available @ https://earth-and-space-news.blogspot.com/2021/09/aug-31-1932-total-solar-eclipse-belongs.html

Marriner, Derdriu. "Aug. 31, 1932, Total Solar Eclipse Was Second of Two Solar Eclipses." Earth and Space News. Wednesday, Aug. 25, 2021.
Available @ https://earth-and-space-news.blogspot.com/2021/08/aug-31-1932-total-solar-eclipse-was.html

Marriner, Derdriu. "Jansky Crater Honors American Physicist and Radio Engineer Karl Jansky." Earth and Space News. Wednesday, Oct. 20, 2021.
Available @ https://earth-and-space-news.blogspot.com/2021/10/jansky-crater-honors-american-physicist.html

The Moon-Wiki. "Dark Halo Craterlets." The Moon-Wiki > Special Features List > Surface Features.
Available @ https://the-moon.us/wiki/Dark_halo_craterlets

The Moon-Wiki. “Dreyer.” The Moon > Lunar Features Alphabetically > D Nomenclature.
Available @ https://the-moon.us/wiki/Dreyer

The Moon-Wiki. “Jansky.” The Moon > Lunar Features Alphabetically > J Nomenclature.
Available @ https://the-moon.us/wiki/Jansky

The Moon-Wiki. “Keeler.” The Moon > Lunar Features Alphabetically > K Nomenclature.
Available @ https://the-moon.us/wiki/Keeler

The Moon-Wiki. “Mare Marginis.” The Moon > Lunar Features Alphabetically > M Nomenclature.
Available @ https://the-moon.us/wiki/Mare_Marginis

Moore, Patrick, Sir. Astronomy Encyclopedia: An A-Z Guide to the Universe. New York NY: Oxford University Press, Inc., 2002.

Moore, Patrick, Sir. Philip’s Atlas of the Universe. Revised edition. London UK: Philip’s, 2005.

U.S. National Archives. "AS08-17-2709 -- Apollo 8 -- Apollo 8 Mission image, Moon, Farside." NARA U.S. National Archives Public Domain Archive.
Available @ https://nara.getarchive.net/media/as08-17-2709-apollo-8-apollo-8-mission-image-moon-farside-773054

Earth and Space News

Wednesday, October 27, 2021

Near Side Jansky Crater Parents Three Satellites in Mare Marginis

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