View source for Astronomy:Sylvester (crater)

{{Short description|Lunar impact crater}}
{{Infobox Lunar crater
| image       = Sylvester crater 4190 h3.jpg
| caption     = [[Astronomy:Lunar Orbiter 4|Lunar Orbiter 4]] image
| coordinates = {{coord|82.7|N|79.6|W|globe:moon_type:landmark|display=inline,title}}
| diameter    = 58 km
| depth       = ''Unknown''
| colong      = 87
| eponym      = [[Biography:James Joseph Sylvester|James J. Sylvester]]
}}
'''Sylvester''' is a [[Astronomy:Lunar craters|lunar]] [[Astronomy:Impact crater|impact crater]] that is located near the north pole of the [[Astronomy:Moon|Moon]], along the northern limb in the [[Astronomy:Libration|libration]] zone. It lies just to the south-southeast of the craters [[Astronomy:Grignard (crater)|Grignard]] and [[Astronomy:Hermite (crater)|Hermite]]; the latter of which is within one crater diameter of the pole. South of Sylvester is [[Astronomy:Pascal (crater)|Pascal]]. Due to its location, Sylvester receives sunlight at only a low angle.

This crater is generally circular, with a sharp-edged rim that has received only a moderate amount of wear. There are no craters of note along the rim, although Sylvester intrudes into a smaller, shallow-rimmed crater to the southeast. The interior floor is relatively flat, but punctuated by several tiny craters. At the midpoint is a small central peak.

==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 Sylvester.

{| class="wikitable"
!width="25%" style="background:#eeeeee;" |Sylvester 
!width="25%" style="background:#eeeeee;" |Latitude
!width="25%" style="background:#eeeeee;" |Longitude
!width="25%" style="background:#eeeeee;" |Diameter
|-
|align="center"|N
|align="center"|82.4° N
|align="center"|67.3° W
|align="center"|20&nbsp;km
|}

==External links==
* [http://planetarynames.wr.usgs.gov/images/Lunar/lac_1_lo.pdf LAC-1 area] - Map of northern lunar pole

==References==
{{Refbegin}}
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  | title = [[Organization:NASA|NASA]] Catalogue of Lunar Nomenclature
  | publisher = NASA RP-1097
  }}
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* {{cite book
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* {{cite book
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  | last = Price
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  | publisher = Cambridge University Press
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  }}
* {{cite book
  | last = Rükl
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* {{cite book
  | last = Webb
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  | title = Celestial Objects for Common Telescopes
  | edition = 6th revised
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  | url = https://archive.org/details/celestialobjects00webb
  }}
* {{cite book
  | first = Ewen A.
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  | publisher = Cambridge University Press
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  }}
* {{cite book
  | first = Peter T.
  | last = Wlasuk
  | date = 2000
  | title = Observing the Moon
  | publisher = Springer
  | isbn = 978-1-85233-193-1
  }}
{{Refend}}


[[Category:Impact craters on the Moon]]

{{Sourceattribution|Sylvester (crater)}}