词条 | Dewar (crater) | ||||||||||||||||
释义 |
| image = Dewar LROC.jpg | image_size = 240px | caption = LRO image | coordinates = {{coord|2.7|S|165.6|E|globe:moon_type:landmark|display=inline,title}} | diameter = 50 km | depth = Unknown | colong = 195 | eponym = James Dewar }} Dewar is a lunar impact crater that lies on the Moon's far side. Less than one crater diameter to the south-southwest is the crater Stratton. Vening Meinesz is a little over one crater diameter to the northwest. The slightly worn rim of this crater is roughly circular, with a small outward protrusion along the southern edge. The interior floor is marked by several small impacts along the eastern side. Dewar lies on the south side of an anomalously low albedo area of terrain (dark patch) on the far side of the moon. The low-albedo area is also a geochemical anomaly, and is high in iron oxide and titanium dioxide. It has been interpreted as a cryptomare.[1] Satellite cratersBy convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Dewar.
References1. ^Lawrence, S. J., B. R. Hawke, J. J. Gillis-Davis, G. J. Taylor, D. J. Lawrence, J. T. Cahill, J. J. Hagerty, P. G. Lucey, G. A. Smith, and K. Keil (2008), Composition and origin of the Dewar geochemical anomaly, J. Geophys. Res., 113, E02001, doi:10.1029/2007JE002904.
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| last = Rükl | first = Antonín | authorlink = Antonín Rükl | date = 1990 | title = Atlas of the Moon | publisher = Kalmbach Books | isbn = 978-0-913135-17-4 | ref = harv
| last = Webb | first = Rev. T. W. | authorlink = Thomas William Webb | date = 1962 | title = Celestial Objects for Common Telescopes | edition = 6th revised | publisher = Dover | isbn = 978-0-486-20917-3 | ref = harv
| first = Ewen A. | last = Whitaker | authorlink = Ewen Whitaker | date = 1999 | title = Mapping and Naming the Moon | publisher = Cambridge University Press | isbn = 978-0-521-62248-6 | ref = harv
| first = Peter T. | last = Wlasuk | date = 2000 | title = Observing the Moon | publisher = Springer | isbn = 978-1-85233-193-1 | ref = harv{{refend}}{{Craters on the Moon: C-F}} 1 : Impact craters on the Moon |
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