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Lat: 1.3°N, Long: 23.7°E, Diam: 2 km, Depth: 0.56 km,
Lunar Orbiter V 075M
Lunar Orbiter IV 085 H1
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LPOD Photo Gallery
Lunar Orbiter Images
Ranger 8 - Frame B072
) near the lower margin of the photograph.
Lunar Orbiter 2 - Frame 2076 med
slightly above centre.
shows an "upside-down" view of
(near the frame's lower margin),
(the bright crater), and
U.S. Highway Number One
Research Ranger 8, Lunar Orbiter 2, and Apollo 10 photographs: Danny Caes
near right border of frame, above center
USGS Geologic Map of the Sabine D region (I-618)
, including the landing sites of
Depth data from
Kurt Fisher database
Viscardy, 1985: 0.56 km
measurement of the shadows in
suggests the depth is closer to 430 m. The diameter also appears to be 2.75 km, a bit larger than the IAU value.
The little crater just outside the SW rim of Collins is about 650 m in diameter and 130 m deep. This crater was part of the
Apollo Landmark Tracking program
, in which Command Module pilots took sextant readings on selected targets. These were later reduced to absolute selenodetic coordinates based on the position of the Command Module as determined by radio triangulation from Earth. From Apollo 10, John Young pointed his sextant at rockslide in the northeast quadrant of the 650 m crater, while from Apollo 11, Michael Collins (for whom the larger crater was later named), used as his target a tiny craterlet just inside the north wall. Neither that crater nor the rockslide are evident in this LO-V medium resolution view. And although there is a higher resolution view available (
), the area in which these tiny targets lie is unfortunately marred by development flaws. Nonetheless, what looks like an 80 m diameter craterlet can be seen near the top of the north rim. Its
-determined coordinates are 1.305°N/23.628°E
Since this LTVT result is based on the same master image used to register the higher resolution views of crater
, it is possible to make a test of the consistency of two systems of selenodetic coordinates. According to
Wollenhaupt et al.
, the correct location of Michael Collins's tiny target crater (known as target 130"/11) in the Mean Earth/Polar Axis lunar coordinate system is (1.26 +/- 0.02)°N / (23.66+/-0.01)°E, indicating that the LTVT reported values need to be corrected by -0.04 degrees in latitude and +0.03 degrees in longitude. Given the uncertainty of 0.01 to 0.02 degrees in the landmark tracking results, this is quite consistent with the corrections that need to be applied to the LTVT readouts (based on the much less precise
) to give the Apollo 11 Laser Ranging Retroreflector (LRRR) its correct position in the detailed views. This means that at least in this small area of the Moon the Apollo Landmark Tracking and LRRR experiments gave consistent results, and produced coordinate systems that are offset from the
by the same amount.
Image below shows the three craters named in honour for Apollo 11 astronauts Edwin Aldrin, Michael Collins, and Neil Armstrong.
mosaic image (WAC No.'s
Click for larger view
. Calibrated by
(October 31, 1930-living), an American astronaut who flew on Gemini 10 and Apollo 11, where he served as the command module pilot. While he orbited the Moon, Neil
performed the first manned landing on the lunar surface.
This replacement name for a formerly
was among the list of 12 names of living astronauts and cosmonauts (six each) approved by the
in 1970 and published in
A peculiar "zigzag"-shaped cluster of craterlets immediately south-southwest of
) seems to have been nicknamed
during the heydays of the first manned lunar landing, see LPOD
Monday Morning Quarterbacking, 4 decades later
The small elongated cluster of depressions immediately northeast of
during the heydays of Project Apollo, see Phil Stooke's LPOD
US-1 and Other Signposts
& Collins" - Small craters near the
Apollo 11 landing site
Michael Collins, Apollo 11:
First Explorers on the Moon; the incredible story of Apollo 11
" (in five parts).
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