Byrgius
Contents
Byrgius - and La Paz (Byrgius A) on the eastern part of its rim
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Lat: 24.7°S, Long: 65.3°W, Diam: 87 km, Depth: 2.13 km, [/R%C3%BCkl%2050 Rükl: 50] |
Table of Contents
LO IV 168 H1
Byrgius with 18.5 km ray-crater Byrgius A (once called La Paz by H.P.Wilkins and P.Moore) at 3 o'clock. The 27 km crater at 10 o'clock is Byrgius D.
Images
LPOD Photo Gallery Lunar Orbiter Images Apollo Images
Maps
([/LAC%20zone LAC zone] 92D1) LAC map Geologic map
Description
Description: Elger
([/IAU%20Directions IAU Directions]) BYRGIUS.--A very irregular enclosure, about 40 miles in diameter, between [/Cavendish Cavendish] and the W. limb, with a lofty and discontinuous border, rising at one point on the W. to a height of 7000 feet above the floor. There are wide openings both in the N. and S. wall, and some ridges within. The border is broken on the W. by a crater, and on the E. by the well-known crater Byrgius A, from which a number of bright streaks radiate, mostly towards the W. One on the E. extends to [/Cavendish Cavendish], and another to [/Mersenius Mersenius], traversing the ring-plain Cavendish C. North-west of Byrgius there is a mountain arm which includes a peak 13,000 feet in height.
Description: Wikipedia
Additional Information
- Depth data from [/Kurt%20Fisher%20crater%20depths Kurt Fisher database]
- Westfall, 2000: 2.13 km
- Cherrington, 1969: 4.57 km
- West rim slope 21° ([/Pohn%2C%201963 Pohn, 1963])
- Satellite crater Byrgius A is on the [/ALPO%20list%20of%20bright%20ray%20craters ALPO list of bright ray craters].
- Satellite crater Byrgius B is on the [/ALPO%20list%20of%20banded%20craters ALPO list of banded craters]
- Byrgius A was one of the distinct "hot spots" during the observations of Saari and Shorthill at the Helwan observatory in Egypt.
- Byrgius A: more than 98% anorthosite in central peak, and 0.3 to 0.7 Maturity Index (mature) [/Ohtake%20and%20others%2C%202009 Ohtake and others, 2009]
Nomenclature
- Named for Joost Bürgi (February 28, 1552 - January 31, 1632), a Swiss clockmaker and mathematician. He invented logarithms independently of John Napier, since his method is distinct from Napier's. [/Neper Napier] published his discovery in 1614, and this publication was widely disseminated in Europe by the time Bürgi published in 1620, at the behest of Johannes [/Kepler Kepler].
- The bright ray-crater Byrgius A was called La Paz by Hugh Percy Wilkins and Patrick Moore, but the IAU did not accept that name. According to the book The Moon by [/Wilkins%20and%20Moore Wilkins and Moore], La Paz was a contemporary American astronomer. It would be interesting to know if La Paz could also have been the controversial investigator Lincoln La Paz of the so-called "green meteors" over the northern USA in 1948. Research Lincoln La Paz: Danny Caes.
LRO Links
- LROC Featured Image: Out of the Shadows: Impact Melt Flow at Byrgius A Crater
LPOD Articles
Bibliography
This page has been edited 1 times. The last modification was made by - tychocrater tychocrater on Jun 13, 2009 3:24 pm - afx3u2
