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A New Atlas?
: Lat: 7.6°N, Long: 21.6°E, Diam: 24 km, Height: 0.33 km,
: Lat: 6.1°N, Long: 20.0°E, Diam: 23 km, Height: 0.27 km,
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LPOD|Photo Gallery images
Lunar Orbiter Images
was very vaguely captured on Lunar Orbiter IV's photograph LOIV-85-H1. See the upper left corner of the
Hi-Res scan of that photograph
May 2, 2010
From LOLA Altimetry - see
Arago Alpha - W-E profile
Arago Beta- W-E profile
Arago Beta - S-N profile
AIC map -- alpha
AIC map -- beta
There are two curious circular protuberances on the Mare W. of
, which are well seen when the E. longitude of the morning terminator is about 19 deg., and a long cleft, passing about midway between them, and extending from the foot of the W. wall to a small crater on the edge of the Mare near
The positions of the domes listed in the title lines are based on
measurements of an Earth-based photo by Paolo Lazzarotti registered to the 1994
. The height estimates are from the most recent
Lunar Dome Catalog (see below). The shadow cast by Arago Alpha in
Consolidated Lunar Atlas
plate D5 gives a height of ~300 m, in reasonable agreement with the GLR value.
1964 Dome Catalog
, Brungart listed
as "Arago 2", assigning it an "order of magnitude" height of 700 m, and listed
as "Arago 1", assigning it a height of 800 m
2005 GLR Lunar Dome Catalog
agrees with the title line on the diameters, but gives the heights of
(which, like Brungart, it lists as Arago 2 and 1) as 150 m and 800 m, respectively. This appears to be an underestimate for
and a considerable overestimate for
. The origin of the 150 m height for
A 2005 article by Lena
, below), appearing simultaneously with the announcement of the 2005 GLR Lunar Dome Catalog, gives height estimates based on shape-from-shading/photoinclinometry of 330+/-30 m and 270+/-30 m.
These numbers are repeated in the 2006
article by the same group (see below), where the features are assigned the new names "A2" (
) and "A3" (
The current GLR
Consolidated Lunar Dome Catalogue
reproduces the information from the
article, giving the heights as 330 m (A2 =
) and 270 m (A3 =
North-northwest of the large dome
is (or should be) the impact location of
, which was an unsuccessful attempt to make close-up photographs of the moon while the probe descended toward the lunar surface.
The exact coordinates of
's impact location are: 9°24' North/ 21°30' East.
Note that chart 35 of Antonin Rukl's
Atlas of the Moon
doesn't show the location of
Additional research Danny Caes
Named for nearby crater. (
Alpha and Beta are Greek-letter designations for lunar peaks, no longer recognized by the
Something for everyone
May Day Dome
: Volcanic domes.
A Portfolio of Lunar Drawings
, pages 10, 11.
Raffaello Lena, Christian Wöhler, Zac Pujic, Jim Phillips, Paolo Lazzarotti and Maria Teresa Bregante (GLR group). (2005) An Unlisted Dome Near Crater Arago.
The Lunar Observer
August 2005 issue
Wöhler, Christian; Lena, Raffaello; Lazzarotti, Paolo; Phillips, Jim; Wirths, Michael; Pujic, Zac; Geologic Lunar Research (GLR) Group. (2006)
A combined spectrophotometric and morphometric study of the lunar mare dome fields near Cauchy, Arago, Hortensius and Milichius
, Volume 183, Issue 2, p. 237-264. (free
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