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==References==
==References==
{{reflist}}
{{reflist}}
{{refbegin}}
{{Lunar crater references}}
* {{cite book
| last1 = Andersson
| first1 = L. E.
| last2 = Whitaker
| first2 = E. A.
| authorlink2 = Ewen Whitaker
| year = 1982
| title = [[NASA]] Catalogue of Lunar Nomenclature
| publisher = NASA RP-1097
| ref = harv
}}
* {{cite web
| last = Blue
| first = Jennifer
| date = July 25, 2007
| title = Gazetteer of Planetary Nomenclature
| publisher = [[United States Geological Survey|USGS]]
| url = http://planetarynames.wr.usgs.gov/
| accessdate = 2007-08-05
| ref = harv
}}
* {{cite book
| last1 = Bussey
| first1 = B.
| authorlink1 = Ben Bussey
| last2 = Spudis
| first2 = P.
| authorlink2 = Paul Spudis
| year = 2004
| title = The Clementine Atlas of the Moon
| publisher = Cambridge University Press
| location = New York
| isbn = 978-0-521-81528-4
| ref = harv
}}
* {{cite book
| last1 = Cocks
| first1 = Elijah E.
| last2 = Cocks
| first2 = Josiah C.
| year = 1995
| title = Who's Who on the Moon: A Biographical Dictionary of Lunar Nomenclature
| publisher = Tudor Publishers
| isbn = 978-0-936389-27-1
| ref = harv
}}
* {{cite web
| last = McDowell
| first = Jonathan
| date = July 15, 2007
| url = http://host.planet4589.org/astro/lunar/
| title = Lunar Nomenclature
| publisher = Jonathan's Space Report
| accessdate = 2007-10-24
| ref = harv
}}
* {{cite doi | 10.1007/BF00171763 }}
* {{cite book
| first = Patrick
| last = Moore
| authorlink = Patrick Moore
| year = 2001
| title = On the Moon
| publisher = Sterling Publishing Co
| isbn = 978-0-304-35469-6
| ref = harv
}}
* {{cite book
| first = Fred W.
| last = Price
| year = 1988
| title = The Moon Observer's Handbook
| publisher = Cambridge University Press
| isbn = 978-0-521-33500-3
| ref = harv
}}
* {{cite book
| last = Rükl
| first = Antonín
| authorlink = Antonín Rükl
| year = 1990
| title = Atlas of the Moon
| publisher = Kalmbach Books
| isbn = 978-0-913135-17-4
| ref = harv
}}
* {{cite book
| last = Webb
| first = Rev. T. W.
| authorlink = Thomas William Webb
| year = 1962
| title = Celestial Objects for Common Telescopes
| edition = 6th revision
| publisher = Dover
| isbn = 978-0-486-20917-3
| ref = harv
}}
* {{cite book
| first = Ewen A.
| last = Whitaker
| authorlink = Ewen Whitaker
| year = 1999
| title = Mapping and Naming the Moon
| publisher = Cambridge University Press
| isbn = 978-0-521-62248-6
| ref = harv
}}
* {{cite book
| first = Peter T.
| last = Wlasuk
| year = 2000
| title = Observing the Moon
| publisher = Springer
| isbn = 978-1-85233-193-1
| ref = harv
}}
{{refend}}


==External links==
==External links==

Revision as of 23:48, 28 June 2014

Gassendi
Oblique view of Gassendi from Apollo 16. NASA photo.
Diameter110 km
Depth1.9 km
Colongitude40° at sunrise
EponymPierre Gassendi
Lunar Orbiter 4 image of Gassendi, with Gassendi A at top

Gassendi is a large lunar crater feature located at the northern edge of Mare Humorum. The formation has been inundated by lava during the formation of the mare, so only the rim and the multiple central peaks remain above the surface. The outer rim is worn and eroded, although it retains a generally circular form. A smaller crater Gassendi A intrudes into the northern rim, and joins a rough uplift at the northwest part of the floor. The crater pair bears a curious resemblance to a diamond ring.

In the southern part of the crater floor is a semi-circular ridge-like formation that is concentric with the outer rim. It is in the southern part where the rim dips down to its lowest portion, and a gap appears at the most southern point. The rim varies in height from as little as 200 meters to as high as 2.5 kilometers above the surface. The floor has numerous hummocks and rough spots. There is also a system of rilles that criss-cross the floor, named the Rimae Gassendi.

On some older maps the crater Gassendi A was called Clarkson, after the British amateur astronomer and selenographer Roland L T Clarkson, but this name is not officially recognized by the IAU and the name has been removed.

Gassendi was considered for a possible landing site during the Apollo program, but was never selected. However, it was imaged at high resolution by Lunar Orbiter 5, for this reason.

Mare Humorum. The rather large crater to the north of the mare is Gassendi

Satellite craters

By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Gassendi.

Gassendi Latitude Longitude Diameter
A 15.5° S 39.7° W 33 km
B 14.7° S 40.6° W 26 km
E 18.4° S 43.5° W 8 km
F 15.0° S 45.0° W 8 km
G 16.8° S 44.6° W 8 km
J 21.6° S 37.0° W 9 km
K 18.7° S 43.6° W 6 km
L 20.4° S 41.8° W 6 km
M 18.6° S 39.0° W 3 km
N 18.0° S 39.2° W 3 km
O 21.9° S 35.1° W 11 km
P 17.2° S 40.6° W 2 km
R 21.9° S 37.7° W 3 km
T 19.0° S 35.4° W 10 km
W 17.6° S 43.7° W 6 km
Y 20.8° S 38.3° W 5 km

Due to its ray system, Gassendi A is mapped as part of the Copernican System.[1]

References

  1. ^ The geologic history of the Moon, 1987, Wilhelms, Don E.; with sections by McCauley, John F.; Trask, Newell J. USGS Professional Paper: 1348. Plate 11: Copernican System (online)
  • Andersson, L. E.; Whitaker, E. A. (1982). NASA Catalogue of Lunar Nomenclature. NASA RP-1097. {{cite book}}: Invalid |ref=harv (help)
  • Blue, Jennifer (July 25, 2007). "Gazetteer of Planetary Nomenclature". USGS. Retrieved 2007-08-05. {{cite web}}: Invalid |ref=harv (help)
  • Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 978-0-521-81528-4. {{cite book}}: Invalid |ref=harv (help)
  • Cocks, Elijah E.; Cocks, Josiah C. (1995). Who's Who on the Moon: A Biographical Dictionary of Lunar Nomenclature. Tudor Publishers. ISBN 978-0-936389-27-1. {{cite book}}: Invalid |ref=harv (help)
  • McDowell, Jonathan (July 15, 2007). "Lunar Nomenclature". Jonathan's Space Report. Retrieved 2007-10-24. {{cite web}}: Invalid |ref=harv (help)
  • Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi: 10.1007/BF00171763 , please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with |doi= 10.1007/BF00171763 instead.
  • Moore, Patrick (2001). On the Moon. Sterling Publishing Co. ISBN 978-0-304-35469-6. {{cite book}}: Invalid |ref=harv (help)
  • Price, Fred W. (1988). The Moon Observer's Handbook. Cambridge University Press. ISBN 978-0-521-33500-3. {{cite book}}: Invalid |ref=harv (help)
  • Rükl, Antonín (1990). Atlas of the Moon. Kalmbach Books. ISBN 978-0-913135-17-4. {{cite book}}: Invalid |ref=harv (help)
  • Webb, Rev. T. W. (1962). Celestial Objects for Common Telescopes (6th revision ed.). Dover. ISBN 978-0-486-20917-3. {{cite book}}: Invalid |ref=harv (help)
  • Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. ISBN 978-0-521-62248-6. {{cite book}}: Invalid |ref=harv (help)
  • Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 978-1-85233-193-1. {{cite book}}: Invalid |ref=harv (help)
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