Alexander (crater)
{{Short description|Crater on the Moon}}
{{Infobox Lunar crater
| image = Alexander_crater_4103_h2.jpg
| image_size =
| caption = Lunar Orbiter 4 image
(spots are blemishes on original image)
| coordinates = {{coord|40.3|N|13.5|E|globe:moon_type:landmark|display=inline,title}}
| diameter = 95 km
| colong = 347
| eponym = Alexander the Great
}}
File:Frigoris-Serenitatis zone Si.jpg
Alexander is a lunar impact crater-like feature in the rugged surface to the north of Mare Serenitatis. It lies to the south-southwest of the prominent crater Eudoxus, and to the east-northeast of Calippus. It was named after Alexander the Great.{{gpn|177|Alexander}}
File:Alexander sattelite craters map.jpg
The Alexander formation has been so heavily worn and distorted with the passage of time that it now resembles little more than a lowland region enclosed by rugged ranges. The rim segments lie along the northwest, west, and south sections of the crater, while the eastern side stands open to the surrounding surface. The surviving walls are nearly rectangular in form, with the most prominent mounts in the northwest.
The crater floor is more smooth and has a darker albedo in the western half, and gradually grows lighter and more impacted toward the east. There are no craters of significance within the perimeter of this formation, although there are tiny craterlets aplenty in the rougher eastern section.
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 Alexander.
| class="wikitable"
!width="25%" style="background:#eeeeee;" |Alexander !width="25%" style="background:#eeeeee;" |Latitude !width="25%" style="background:#eeeeee;" |Longitude !width="25%" style="background:#eeeeee;" |Diameter |
| align="center"|A
|align="center"|40.7° N |align="center"|14.9° E |align="center"|4 km |
| align="center"|B
|align="center"|40.3° N |align="center"|15.2° E |align="center"|4 km |
| align="center"|C
|align="center"|38.5° N |align="center"|14.9° E |align="center"|5 km |
| align="center"|K
|align="center"|40.5° N |align="center"|19.3° E |align="center"|4 km |
References
{{Reflist}}
{{refbegin}}
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| last1 = Andersson
| first1 = L. E.
| last2 = Whitaker
| first2 = E. A.
| author-link2 = Ewen Whitaker
| date = 1982
| title = NASA Catalogue of Lunar Nomenclature
| publisher = NASA RP-1097
}}
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| last1 = Bussey
| first1 = B.
| author-link1 = Ben Bussey
| last2 = Spudis
| first2 = P.
| author-link2 = Paul Spudis
| date = 2004
| title = The Clementine Atlas of the Moon
| publisher = Cambridge University Press
| location = New York
| isbn = 978-0-521-81528-4
}}
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| last1 = Cocks
| first1 = Elijah E.
| last2 = Cocks
| first2 = Josiah C.
| date = 1995
| title = Who's Who on the Moon: A Biographical Dictionary of Lunar Nomenclature
| publisher = Tudor Publishers
| isbn = 978-0-936389-27-1
| url = https://archive.org/details/isbn_9780936389271
}}
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| last = McDowell
| first = Jonathan
| date = July 15, 2007
| url = http://host.planet4589.org/astro/lunar/
| title = Lunar Nomenclature
| publisher = Jonathan's Space Report
| access-date = 2007-10-24
}}
- {{cite journal| last1 = Menzel| first1 = D. H.| last2 = Minnaert| first2 = M.| last3 = Levin| first3 = B.| last4 = Dollfus| first4 = A.| last5 = Bell| first5 = B.| title = Report on Lunar Nomenclature by the Working Group of Commission 17 of the IAU| doi = 10.1007/BF00171763| journal = Space Science Reviews| volume = 12| issue = 2| pages = 136–186| date = 1971| bibcode = 1971SSRv...12..136M| s2cid = 122125855}}
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| first = Patrick
| last = Moore
| author-link = Patrick Moore
| date = 2001
| title = On the Moon
| publisher = Sterling Publishing Co.
| isbn = 978-0-304-35469-6
| url = https://archive.org/details/patrickmooreonmo00patr
}}
- {{cite book
| first = Fred W.
| last = Price
| date = 1988
| title = The Moon Observer's Handbook
| publisher = Cambridge University Press
| isbn = 978-0-521-33500-3
}}
- {{cite book
| last = Rükl
| first = Antonín
| author-link = Antonín Rükl
| date = 1990
| title = Atlas of the Moon
| publisher = Kalmbach Books
| isbn = 978-0-913135-17-4
}}
- {{cite book
| last = Webb
| first = Rev. T. W.
| author-link = Thomas William Webb
| date = 1962
| title = Celestial Objects for Common Telescopes
| edition = 6th revised
| publisher = Dover
| isbn = 978-0-486-20917-3
| url = https://archive.org/details/celestialobjects00webb
}}
- {{cite book
| first = Ewen A.
| last = Whitaker
| author-link = Ewen Whitaker
| date = 1999
| title = Mapping and Naming the Moon
| publisher = Cambridge University Press
| isbn = 978-0-521-62248-6
}}
- {{cite book
| first = Peter T.
| last = Wlasuk
| date = 2000
| title = Observing the Moon
| publisher = Springer
| isbn = 978-1-85233-193-1
}}
{{refend}}
{{Commons category}}
{{Craters on the Moon: A–B}}