Apollo (crater)

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Apollo
Apollo crater 5030 med.jpg
Oblique Lunar Orbiter 5 image
Coordinates 36°06′S151°48′W / 36.1°S 151.8°W / -36.1; -151.8
Diameter 537 km [1]
Colongitude 161° at sunrise
Eponym Project Apollo

Apollo, also called the Apollo basin, is an enormous impact crater located in the southern hemisphere on the far side of the Moon. This formation dwarfs the large crater Oppenheimer that is located next to the western rim. The crater Barringer lies across the northern wall. To the southeast is the crater Anders, and Kleymenov is just to the east of the rim.

Contents

Apollo is a double-ringed walled plain (or basin) whose inner ring is roughly half the diameter of the outer wall. Both the outer wall and the interior have been heavily worn and eroded by subsequent impacts, so that significant parts of the outer and inner walls now consist of irregular and incised sections of mountainous arcs.

The interior floor is covered in a multitude of craters of various sizes, some of which have been named for people associated with the Apollo program or other NASA projects.

Sections of Apollo's interior have been resurfaced with lava, leaving patches of the floor with a lower albedo than the surroundings. There is a large patch of this lunar mare in the middle part of the inner ring, which contains some ray system markings. A long stretch of the mare lies along the southern part of the crater. There is also a smaller section near the western rim.

Prior to formal naming in 1970 by the IAU, [2] the crater was known as Basin XVI. [3]

Interior craters

Three craters are named after the crew of Apollo 8. In the southeast part of Apollo is Borman crater, named after commander Frank Borman. Near the southeastern margin of Apollo is Anders crater, named after William Anders. On the eastern margin is Lovell crater, named after Jim Lovell.

Many craters within and adjacent to the Apollo impact have been named to honor deceased NASA employees.

Dryden is attached to the west-northwestern exterior of the inner ring. Chaffee is a similar-sized crater that lies partly across the southwest section of the inner ring. Inside the inner ring are the craters Resnik, McAuliffe and Onizuka, and the JarvisMcNair crater pair. The crater Smith lies across the northern part of the inner ring.

In 2006 the IAU approved a proposal to name seven interior craters to honor the astronauts killed in the Space Shuttle Columbia disaster. [4] [5]

The craters L. Clark (LC), Chawla (C), D. Brown (DB), M. Anderson (MA), McCool (M), Ramon (R), and Husband (H). Lunar Orbiter 5 image. Columbia astronaut craters labeled 5026 h1.jpg
The craters L. Clark (LC), Chawla (C), D. Brown (DB), M. Anderson (MA), McCool (M), Ramon (R), and Husband (H). Lunar Orbiter 5 image.
Crater Coordinates DiameterName source
Chawla 42°48′S147°30′W / 42.8°S 147.5°W / -42.8; -147.5 15 km Kalpana Chawla
D. Brown 42°00′S147°12′W / 42.0°S 147.2°W / -42.0; -147.2 15 km David McD. Brown
Husband 40°48′S147°54′W / 40.8°S 147.9°W / -40.8; -147.9 29 km Richard D. Husband
L. Clark 43°42′S147°42′W / 43.7°S 147.7°W / -43.7; -147.7 16 km Laurel B. S. Clark
McCool 41°42′S146°18′W / 41.7°S 146.3°W / -41.7; -146.3 21 km William C. McCool
M. Anderson 41°36′S149°00′W / 41.6°S 149.0°W / -41.6; -149.0 17 km Michael P. Anderson
Ramon 41°36′S148°06′W / 41.6°S 148.1°W / -41.6; -148.1 17 km Ilan Ramon

Three of the crater names include the respective astronaut's first initials to distinguish them from the existing craters called Anderson, Brown and Clark.

Robotic exploration

China sent Chang'e 6 on 3 May 2024, which conducted the first lunar sample return from Apollo Basin on the far side of the Moon. [6] This is China's second lunar sample return mission, the first was achieved by Chang'e 5 from the lunar near side four years earlier. [7] It also carried a Chinese rover called Yidong Xiangji to conduct infrared spectroscopy of lunar surface and imaged Chang'e 6 lander on lunar surface. [8] The lander-ascender-rover combination was separated with the orbiter and returner before landing on 1 June 2024 at 22:23 UTC. It landed on the Moon's surface on 1 June 2024. [9] [10] The ascender was launched back to lunar orbit on 3 June 2024 at 23:38 UTC, carrying samples collected by the lander, and later will complete the another robotic rendezvous and docking in lunar orbit. The sample container will be then transferred to the returner, which will land in Inner Mongolia on June 25th, 2024, completing China's far side extraterrestrial sample return mission.

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<span class="mw-page-title-main">Anders (crater)</span> Crater on the Moon

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<span class="mw-page-title-main">Korolev (lunar crater)</span> Lunar impact crater

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<span class="mw-page-title-main">Borman (crater)</span> Lunar impact crater

Borman is a lunar impact crater that is located in the southern hemisphere on the far side of the Moon. It lies across the southeast section of the mountainous inner ring, within the walled basin named Apollo.

<span class="mw-page-title-main">Von Kármán (lunar crater)</span> Lunar impact crater

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<span class="mw-page-title-main">Fabry (crater)</span> Impact crater

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<span class="mw-page-title-main">Barringer (lunar crater)</span> Lunar impact crater

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<span class="mw-page-title-main">Chaffee (crater)</span> Lunar impact crater

Chaffee is a lunar impact crater that is located in the southern hemisphere on the far side of the Moon. It lies within the huge walled plain Apollo, and is one of several craters in that formation named for astronauts and people associated with the Apollo program. This basin is a double-ringed formation, and the crater Chaffee is situated across the southwest part of the inner ring. The ridge from this ring extends northward from the northern rim of Chaffee.

<span class="mw-page-title-main">Dryden (crater)</span> Lunar impact crater

Dryden is a lunar impact crater that is located on the southern hemisphere on the far side of the Moon. It lies within the huge walled plain called Apollo, and is one of several features within that basin named after people associated with the Apollo program. Apollo itself has an inner ring, and Dryden is attached to the west-northwest part of that circular mountain formation. To the south of Dryden along the same range is the crater Chaffee.

<span class="mw-page-title-main">Mendeleev (crater)</span> Impact crater

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<span class="mw-page-title-main">Oppenheimer (crater)</span> Lunar impact crater

Oppenheimer is a large lunar impact crater that lies on the Far side of the Moon. It lies along the western outer rampart of the immense walled plain Apollo. Nearby features of note include the dark-floored crater Maksutov to the southwest, and Davisson to the west-southwest. The latter intrudes into the eastern rim of Leibnitz, a feature about 20% larger than Oppenheimer.

<span class="mw-page-title-main">Chauvenet (crater)</span> Lunar impact crater

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<span class="mw-page-title-main">Chalonge (crater)</span> Crater on the Moon

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<span class="mw-page-title-main">Ibn Firnas (crater)</span> Lunar impact crater

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<span class="mw-page-title-main">Dobrovolʹskiy (crater)</span> Crater on the Moon

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<span class="mw-page-title-main">Frost (crater)</span> Lunar impact crater on the far side of the Moon

Frost is a lunar impact crater that is attached to the southern rim of the walled plain Landau, and lies on the far side of the Moon. Just to the east is Petropavlovskiy, and to the northeast along the edge of Landau is Razumov. The crater Douglass is located less than a crater diameter to the west-southwest.

<span class="mw-page-title-main">Planté (crater)</span> Crater on the Moon

Planté is a lunar crater that is situated near the eastern inner wall of the much larger crater Keeler. Just to the east, attached to the exterior of Keeler, is the large crater Heaviside. Planté is located on the far side of the Moon and cannot be viewed directly from the Earth.

References

  1. Don E. Wilhelms & Charles J. Byrne (23 January 2009). "Stratigraphy of Lunar Craters". Archived from the original on 18 February 2021. Retrieved 21 July 2011.
  2. Apollo, Gazetteer of Planetary Nomenclature, International Astronomical Union (IAU) Working Group for Planetary System Nomenclature (WGPSN)
  3. Lunar Farside Chart (LFC-1A)
  4. Blue, Jennifer (2006-07-27). "Names for the Columbia astronauts provisionally approved". USGS Astrogeology. Archived from the original on 30 June 2006. Retrieved 2006-06-08.
  5. Blue, Jennifer (2006-08-30). "Provisional Names Approved". USGS. Archived from the original on 2006-10-09. Retrieved 2007-05-07.
  6. Andrew Jones [@AJ_FI] (April 25, 2023). "China's Chang'e-6 sample return mission (a first ever lunar far side sample-return) is scheduled to launch in May 2024, and expected to take 53 days from launch to return module touchdown. Targeting southern area of Apollo basin (~43º S, 154º W)" (Tweet) via Twitter.
  7. Jones, Andrew (10 January 2024). "China's Chang'e-6 probe arrives at spaceport for first-ever lunar far side sample mission". SpaceNews . Retrieved 10 January 2024.
  8. Jones, Andrew (6 May 2024). "China's Chang'e-6 is carrying a surprise rover to the moon". SpaceNews. Archived from the original on 8 May 2024. Retrieved 8 May 2024.
  9. Jones, Andrew (1 June 2024). "Chang'e-6 lands on far side of the moon to collect unique lunar samples". SpaceNews . Retrieved 1 June 2024.
  10. Seger Yu [@SegerYu] (June 1, 2024). "落月时刻 2024-06-02 06:23:15.861" (Tweet) (in Chinese) via Twitter.