達格隕石坑

達格隕石坑（Dag）是位於月球正面幸福湖中的一座微型撞擊坑，其名稱取自斯堪的納維亞男性名，1976年被國際天文學聯合會正式接受。

描述

該月坑是月表上一處不起眼的凹地，東南偏南緊鄰艾娜月坑、南面則是略大的奧薩馬隕石坑，往東南(艾娜月坑東面)坐落了高約10米^[1]的阿格妮絲山^[2]。該隕坑中心月面坐標為18°43′N 5°16′E / 18.71°N 5.26°E / 18.71; 5.26，直徑0.36公里^[3]，深約0.052公里^[4]。

達格隕石坑外觀類似水滴狀，西北側連接了一座更小的撞擊坑，隕坑坑壁最大高出周邊區域10米^[4]，坑底表面散布有眾多的小坑穴。

達格隕石坑及周邊，阿波羅17號拍攝。

^ Garry, W. B.; Robinson, M. S.; Zimbelman, J. R.; Bleacher, J. E.; et al. The origin of Ina: Evidence for inflated lava flows on the Moon (PDF). Journal of Geophysical Research. November 2012, 117: E00H31. Bibcode:2012JGRE..117.0H31G. doi:10.1029/2011JE003981. （原始內容 (PDF)存檔於2014-11-04）. (the map from this work)
^ Crater Dagy on the map LAC-41. (PDF). [2017-07-31]. （原始內容存檔 (PDF)於2013-02-20）.
^ Directory of the International Astronomical Union. [2017-07-31]. （原始內容存檔於2017-07-31）.
^ ^4.0 ^4.1 Lunar Impact Crater Database

Andersson, L. E.; Whitaker, E. A. NASA Catalogue of Lunar Nomenclature. NASA RP-1097. 1982.
Blue, Jennifer. Gazetteer of Planetary Nomenclature. USGS. July 25, 2007 [2007-08-05]. （原始內容存檔於2018-12-25）.
Bussey, B.; Spudis, P. The Clementine Atlas of the Moon. New York: Cambridge University Press. 2004. ISBN 978-0-521-81528-4.
Cocks, Elijah E.; Cocks, Josiah C. Who's Who on the Moon: A Biographical Dictionary of Lunar Nomenclature. Tudor Publishers. 1995. ISBN 978-0-936389-27-1.
McDowell, Jonathan. Lunar Nomenclature. Jonathan's Space Report. July 15, 2007 [2007-10-24]. （原始內容存檔於2018-12-25）.
Menzel, D. H.; Minnaert, M.; Levin, B.; Dollfus, A.; Bell, B. Report on Lunar Nomenclature by the Working Group of Commission 17 of the IAU. Space Science Reviews. 1971, 12 (2): 136–186. Bibcode:1971SSRv...12..136M. doi:10.1007/BF00171763.
Moore, Patrick. On the Moon. Sterling Publishing Co. 2001. ISBN 978-0-304-35469-6.
Price, Fred W. The Moon Observer's Handbook. Cambridge University Press. 1988. ISBN 978-0-521-33500-3.
Rükl, Antonín. Atlas of the Moon. Kalmbach Books. 1990. ISBN 978-0-913135-17-4.
Webb, Rev. T. W. Celestial Objects for Common Telescopes 6th revised. Dover. 1962. ISBN 978-0-486-20917-3.
Whitaker, Ewen A. Mapping and Naming the Moon. Cambridge University Press. 1999. ISBN 978-0-521-62248-6.
Wlasuk, Peter T. Observing the Moon. Springer. 2000. ISBN 978-1-85233-193-1.