Borda (crater)

Borda
	Lunar Orbiter 4 image
Coordinates	25°06′S 46°36′E / 25.1°S 46.6°E
Diameter	45.40 km (28.21 mi)
Depth	2.9 km (1.8 mi)
Colongitude	314° at sunrise
Eponym	Jean-Charles de Borda

Borda is a lunar impact crater that lies between Santbech to the north-northwest and Reichenbach slightly further away to the south-southeast.^[2] It has a low rim^[3] that is broken along the southeast by a smaller crater. The rim is intruded into by another small crater along the southwest side, and there is an irregular cleft along the northwest face. There is a central peak at the midpoint of the floor.^[4]^: 97 Vallis Snellius extends eastward from south of this crater to Hase D, a length of 500 km.^[5]

This crater is named after French astronomer Jean-Charles de Borda (1733-1799). His name was incorporated into lunar nomenclature by German astronomer J. H. von Mädler in 1837.^[6] Its designation was formally adopted by the International Astronomical Union in 1935.^[1]

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 Borda.^[7]

Borda^[4]^: 293	Latitude	Longitude	Diameter
A	26.8° S	51.0 E	19 km
D	24.5° S	46.3° E	6 km
E	24.0° S	45.5° E	12 km
F	26.3° S	47.5° E	11 km
G	26.2° S	45.4° E	6 km
H	26.7° S	46.7° E	10 km
J	26.9° S	47.0° E	17 km
K	27.5° S	47.2° E	12 km
L	27.0° S	47.7° E	12 km
M	25.4° S	43.9° E	15 km
R	27.4° S	50.5° E	17 km

References

1 2 "Borda". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
↑ "LAC 97" (PDF). Gazeteer of Planetary Nomenclature. Retrieved 2026-06-14.
↑ Moore, Patrick (2001). On the Moon. Sterling Publishing Co. p. 217. ISBN 978-0-304-35469-6.
1 2 Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 978-0-521-81528-4.
↑ Grego, Peter (2005). The Moon and How to Observe It. Astronomers' Observing Guides Series. London: Springer-Verlag. p. 219. ISBN 1-85233-748-6.
↑ Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. pp. 120, 219. ISBN 978-0-521-62248-6.
↑ Grego, P. (2015). "Satellite Crater". In Hargitai, H.; Kereszturi, Á. (eds.). Encyclopedia of Planetary Landforms. New York, NY: Springer. doi:10.1007/978-1-4614-3134-3_328.

Sources

Price, Fred W. (1988). The Moon Observer's Handbook. Cambridge University Press. ISBN 978-0-521-33500-3.
Rükl, Antonín (1990). Atlas of the Moon. Kalmbach Books. ISBN 978-0-913135-17-4.
Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 978-1-85233-193-1.

[GPN-1] 1 2 "Borda". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.

[LAC-97-2] "LAC 97" (PDF). Gazeteer of Planetary Nomenclature. Retrieved 2026-06-14.

[Moore_2001-3] Moore, Patrick (2001). On the Moon. Sterling Publishing Co. p. 217. ISBN 978-0-304-35469-6.

[Bussey_Spudis_2004-4] 1 2 Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 978-0-521-81528-4.

[Grego_2005-5] Grego, Peter (2005). The Moon and How to Observe It. Astronomers' Observing Guides Series. London: Springer-Verlag. p. 219. ISBN 1-85233-748-6.

[Whitaker_1999-6] Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. pp. 120, 219. ISBN 978-0-521-62248-6.

[Grego_2015-7] Grego, P. (2015). "Satellite Crater". In Hargitai, H.; Kereszturi, Á. (eds.). Encyclopedia of Planetary Landforms. New York, NY: Springer. doi:10.1007/978-1-4614-3134-3_328.

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