Summary: Hall Crater parents five satellites in southeastern Lacus Somniorum (Lake of Dreams), a basaltic plain in the lunar near side’s northeastern quadrant.
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| Detail of U.S. Geological Survey (USGS) map of lunar Geminus Quadrangle shows Hall Crater system of parent and five satellites (C, J, K, X, Y) in near side’s Lacus Somniorum; USGS in cooperation with NASA and USAF ACIC (Aeronautical Chart and Information Center), 1974: U.S. Geological Survey, via USGS Publications Warehouse |
Hall Crater parents five satellites in southeastern Lacus Somniorum (Lake of Dreams), an irregularly shaped feature occupying the lunar near side’s northeastern quadrant as a lunar mare (Latin: mare, “sea”), or dark, basaltic lava plain.
Flooded primary lunar crater Hall is centered at 33.81 degrees north latitude, 36.75 degrees east longitude, according to the International Astronomical Union’s (IAU) Gazetteer of Planetary Nomenclature. The northern hemisphere crater’s northernmost and southernmost latitudes occur at 34.33 degrees north and 33.29 degrees north, respectively. The northern hemisphere crater’s easternmost and westernmost longitudes reach 37.38 degrees east and
36.12 degrees east, respectively. Hall Crater’s diameter measures 31.77 kilometers.
The lunar near side’s Hall Crater system comprises one primary crater and five satellites (C, J, K, X, Y). The quintet of satellites reside to the north of their parent’s northern rim.
Hall C lies to the near northwest of its parent’s northwestern rim. Its placement qualifies C as the most southerly of the Hall Crater system’s five satellites. Hall C also claims the nearest location to its parent.
Hall C is centered at 34.71 degrees north latitude, 35.88 degrees east longitude. It posts northernmost and southernmost latitudes of 34.8 degrees north and 34.61 degrees north, respectively. It marks easternmost and westernmost longitudes at 35.99 degrees east and 35.77 degrees east, respectively. Hall C’s diameter measures 5.7 kilometers.
Hall K occurs as the Hall Crater system’s second northwestern satellite. K lies to the northwest of Hall C. Hall K’s outlying location qualifies it as the most westerly of the Hall Crater system’s five satellites.
Hall K is centered at 35.57 degrees north latitude, 34.26 degrees east longitude. It finds northernmost and southernmost latitudes at 35.68 degrees north and 35.45 degrees north, respectively. It confines its easternmost and
westernmost longitudes to 34.4 degrees east and 34.11 degrees east, respectively. Hall K’s diameter measures 7.21 kilometers.
Hall J and Hall Y lie to the north of their parent. Hall Y’s placement to the north of Hall J qualifies Y as the Hall Crater system’s most northerly satellite.
Hall J is centered at 35.47 degrees north latitude, 36.9 degrees east longitude. It records northernmost and southernmost latitudes of 35.6 degrees north and 35.35 degrees north, respectively. It registers easternmost and
westernmost longitudes at 37.06 degrees east and 36.75 degrees east, respectively. Hall J’s diameter measures 7.55 kilometers.
Hall J’s diameter qualifies it as the largest of the Hall Crater system’s five satellites. Its diameter of 7.55 kilometers approximates 23.75 percent of its parent’s 31.77-kilometer diameter.
Hall Y is centered at 36.34 degrees north latitude, 36.94 degrees east longitude. It confines its northernmost and southernmost latitudes to 36.4 degrees north and 36.28 degrees north, respectively. It sets its easternmost and westernmost longitudes at 37.02 degrees east and 36.86 degrees east, respectively. Hall Y has a diameter of 3.69 kilometers.
Hall Y’s diameter qualifies it as the smallest of the Hall Crater system’s five satellites. Its diameter of 3.69 kilometers approximates 48.9 percent of the 7.55-kilometer diameter assigned to Hall J, the Hall Crater system’s largest satellite. Hall Y’s diameter approximates 11.6 percent of its parent’s 31.77-kilometer diameter.
Hall X forms a tight triangle with northern satellites J and Y. X lies to the southeast of Y and to the northeast of J. Hall X’s placement qualifies it as the most easterly of the Hall Crater system’s five satellites.
Hall X is centered at 35.7 degrees north latitude, 37.83 degrees east longitude. It sets its northernmost and southernmost latitudes at 35.77 degrees north and 35.64 degrees north, respectively. Its easternmost and westernmost
longitudes are found at 37.91 degrees east and 37.75 degrees east, respectively. Hall X has a diameter of 4 kilometers.
The takeaways for Hall Crater’s parentage of five satellites in southeastern Lacus Somniorum (Lake of Dreams) are that the Hall Crater system occupies the near side’s northeastern quadrant; that the Hall Crater system’s largest and smallest satellites are Hall J and Hall Y, respectively; and that Hall Y, Hall X, Hall C and Hall K qualify as the Hall Crater system’s most northerly, easterly, southerly and westerly satellites, respectively.
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| Detail of Lunar Astronautical Charts (LAC) 27 shows Hall Crater and its five satellites (C, J, K, X, Y) in southeastern Lacus Somniorum (Lake of Dreams); courtesy NASA (National Aeronautics and Space Administration) / GSFC (Goddard Space Flight Center) / ASU (Arizona State University): U.S. Geological Survey, 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 U.S. Geological Survey (USGS) map of lunar Geminus Quadrangle shows Hall Crater system of parent and five satellites (C, J, K, X, Y) in near side’s Lacus Somniorum; USGS in cooperation with NASA and USAF ACIC (Aeronautical Chart and Information Center), 1974: U.S. Geological Survey, via USGS Publications Warehouse @ https://pubs.usgs.gov/imap/0841/plate-1.pdf
Detail of Lunar Astronautical Charts (LAC) 27 shows Hall Crater and its five satellites (C, J, K, X, Y) in southeastern Lacus Somniorum (Lake of Dreams); courtesy NASA (National Aeronautics and Space Administration) / GSFC
(Goddard Space Flight Center) / ASU (Arizona State University): U.S. Geological Survey, Public Domain, via USGS Astrogeology Science Center / Gazetteer of Planetary Nomenclature @ https://planetarynames.wr.usgs.gov/images/Lunar/lac_27_wac.pdf
For further information:
For further information:
Consolmagno, Guy; and Dan M. Davis. Turn Left at Orion. Fourth edition. Cambridge UK; New York NY: Cambridge University Press, 2011.
Grego, Peter. The Moon and How to Observe It. Astronomers’ Observing Guides. London UK: Springer-Verlag, 2005.
Grolier, Maurice J. “Geologic Map of the Geminus Quadrangle of the Moon.” Geologic Atlas of the Moon Geminus Quadrangle I-841 (LAC-27). Prepared in cooperation with the National Aeronautics and Space Administration and the
USAF Aeronautical Chart and Information Center. Reston VA: The U.S. Geolgical Survey, 1974.
Available via USGS Publications Warehouse @ https://pubs.usgs.gov/imap/0841/plate-1.pdf
Available via USGS Publications Warehouse @ https://pubs.usgs.gov/imap/0841/plate-1.pdf
International Astronomical Union (IAU) / U.S. Geological Survey (USGS) Gazetteer of Planetary Nomenclature. “Hall.” USGS Astrogeology Science Center > Gazetteer of Planetary Nomenclature > Nomenclature > The Moon. Last
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Available @ https://planetarynames.wr.usgs.gov/Feature/2327
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Available @ https://planetarynames.wr.usgs.gov/Feature/9687
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Available @ https://planetarynames.wr.usgs.gov/Feature/9688
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Available @ https://planetarynames.wr.usgs.gov/Feature/9689
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International Astronomical Union (IAU) / U.S. Geological Survey (USGS) Gazetteer of Planetary Nomenclature. “Hall X.” USGS Astrogeology Science Center > Gazetteer of Planetary Nomenclature > Nomenclature > The Moon. Last
updated Oct. 18, 2010.
Available @ https://planetarynames.wr.usgs.gov/Feature/9690
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Available @ https://planetarynames.wr.usgs.gov/Feature/9691
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International Astronomical Union (IAU) / U.S. Geological Survey (USGS) Gazetteer of Planetary Nomenclature. “Lacus Somniorum.” USGS Astrogeology Science Center > Gazetteer of Planetary Nomenclature > Nomenclature > The Moon. Last updated Oct. 18, 2010.
Available @ https://planetarynames.wr.usgs.gov/Feature/3217
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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.
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Available @ https://earth-and-space-news.blogspot.com/2013/11/hall-crater-honors-american-astronomer.html
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Marriner, Derdriu. “Stickney Crater Honors Phobos Discoverer Asaph Hall’s First Wife.” Earth and Space News. Wednesday, July 3, 2013.
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