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Regiomontanus

Regiomontanus

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Purbach

Deslandres to Maginus The % was crater Waller but now renamed as Walltier. 2000.11.05 13:35 UT Age 9 days. FS128-LE12.5-ÜV2300

Maginus

A large walled plain, 194 km in diameter. It is much older than Tycho, as suggested by the eroded rim, the interior peppered with impact craters and the absence of rays.

Deslandres 4.80 W 33.10 S

A vast ruined walled plain, 256 km in diameter. Its floor contains crater Hell (33 km), short chains of secondary craterlets and a bright spot. See Image T074.

A walled plain with mountain massif on its eastern floor, Desondres ¡n shadow ¿oci.oí." 2' n

128 km in diameter. (Remark: This crater is now renamed as Walther. _

Walther (formerly Walter) 1.00 E 3 3. 10 S

Diophantus Crater

The original"Walter" is confusingly allocated to a 1-km crater at 33.80W 28.0°N near Diophantus. See \Map 22.)

Regiomontanus 1.00 W 28.30 S

A walled plain, 126x108 km. It has a summit crater Rigiomontanus A (6 km) on the central peak.

Clavius at age of 10 and 22 days

Black Death Disease
CEavius 2005.04.18 -14:53l/T Age 9.8 days. 10-ln f/6 Newtonian + 2.5X +■ 1.6X + ToUcam (mosaiCoF2 video clips)
Clavius & Blancanus 2004.08.07 1S:48UT Age 22 days. 1(HnW Newtonian + 2.5X + ToUcam at 1/33 sec

Tycho at age of 9 and 10 days (1 day difference).

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Mag i n u 5 an d Tyc h o (i n shadow) 2004.06.» 13:53 UT Age 9 da-ys. 1 D-in f™ Newtonian + 2.5X + ToLlcam, 11 fames stacked.

Hubble Telescope Pictures The Moon

Tycho 2005.04.18 14:56UT Age 10 days. 1(Hn f/6 Newtonian + 2.SX + 1.6X + ToUcam at 1/33 sec, 52fran>es.

Face Cachee Lune
Mag in US 2004.09.05 21:18 UT Age 21 days. 1CMn m Newtonian + 2.5X + 1.SX + ToUcam al 1/25 sec 47 frames.
1. Moretus 2. Newton 3. Gruembarger 2004.09.05 21:16 UT Age 21 days. 10-inf/S +2.5K+1.6X + ToUcam
Crater Walter

Deslandres and its vicinity 2004.05.26 13:47UT Age 9 days. 10-inf/6 Newtonian + 2.5X + ToUcam. The * was crater Walter but currently renamed as Walther. Note "Cassini's Bright Spot" and the chains of crate rtets on the floor of Deslandres. A shallow, valley-1 ike trough intersects the northeastern rim of Lexell.

Deslandres and its vicinity 2004.05.26 13:47UT Age 9 days. 10-inf/6 Newtonian + 2.5X + ToUcam. The * was crater Walter but currently renamed as Walther. Note "Cassini's Bright Spot" and the chains of crate rtets on the floor of Deslandres. A shallow, valley-1 ike trough intersects the northeastern rim of Lexell.

See also Image T127 in |Map 33

1. Hesiodus 2, Rima Hesiodus 3, Pitatus 4. G a uncus 5. Wurzelbauer 6 Weiss 7, Cichus 8, Kiss 9 Palus EpidemÉarum 2005.11.11 12:06 UT Age&.Sdays. 10-inch f/6 Newtonian + 2.&X + ToUcam, 97frames stacted.

Crater Gauricus
Pitatus, Gauricus, Wuraetbaiiera Hesiodus 2005.11.11 12:19 UT Age 9.5days. 1<Hn tf6 fte*taiian +<(X + Tolteam (jjmsafc)

Pitatus 13.50 W 29.90 S

A large flooded crater with central peak submerged partially in lava, 106 km in diameter. A system of sinuous rilles (Rimae Pitatus, length 94 km) runs along the inner rim. The white patches on the floor are remnant of deposited materials thrown out from the Tycho impact.

Gauricus 12.60 W 33.80 S

A heavily eroded crater, 79 km in diameter. Its wide wall is encircled by a ring of small craters. The northern floor is scarred with a nameless relief that resembles the shape of a water droplet.

Hesiodus 16.30 W 29.40 S (Image T083 & T248)

A 42-km flooded crater. The center of its floor is hit by a small crater Hesiodus D. The adjoined crater Hesiodus A (15 km) has double concentric walls. Rima Hesiodus is a linear rille running from Hesiodus into Palus Epidemiarum, 3 km wide, 256 km long.

Ptolemaeus, Alphonsus, Purbach, Rupes Recta, Albategnius, Hipparchus, Fra Mauro

Ptolemaeus

Ptolemaeus to Deslandres The # was crater Walter but now renamed as Walther. 2000.11.05 13:38 UT Age 9 days. FS128+LE12.5+QV2300

Ptolemaeus

Ptolemaeus to Deslandres The # was crater Walter but now renamed as Walther. 2000.11.05 13:38 UT Age 9 days. FS128+LE12.5+QV2300

The prominent crater trio: Arzachel, Alphonsus and Ptolemaeus

Arzachel, Alpetragius, Alphonsus and Ptolemaeus {mosaic from a batch of video clips)

2004.00.05 20:63 -21:11 UT Age 21 days. Very misly sky. 10-in68 Newtonian + 2.5X + 1.6X + Tollcam at 1/25 sec.

T A sketch of Imbrium Sculpture in a paper by the American geologist Grove Karl Gilbert (1843-1918). It is a terrain of grooves and ridges radial to Mare Imbrium, and affects a large area of the lunar surface. Part of this sculpture is easily seen on the walls of Alphonsus at the middle of T130. Other parts are traceable in T101 and T179 of following pages, also in Map 31|.

Arzachel, Alpetragius, Alphonsus and Ptolemaeus {mosaic from a batch of video clips)

2004.00.05 20:63 -21:11 UT Age 21 days. Very misly sky. 10-in68 Newtonian + 2.5X + 1.6X + Tollcam at 1/25 sec.

Ptolemaeus 1.90 W 9.30 S

Ptolemaeus is a prominent walled plain, 164 km in diameter. Its floor contains a mascon and appears flat, but numerous craterlets and pits are detectable at high powers. Ammonius (diameter 8 km) is a distinctive crater on the floor; it adjoins a saucer-shaped depression (Ptolemaeus B, 17 km). The floor also changes dramatically during a lunation. It is very bright during the full moon but appears quite dark at days close to the first and last quarters.

Ptolemaeus, Alphonsus (108 km) & Arzachel (96 km) form an interesting trio. The floor of Arzachel contains a prominent central peak and a system of sharp rilles (Rimae Arzachel, length 50 km). Alphonsus is characterized by ridged floor with dark halo craters and rilles (Rimae Alphonsus) along its inner rim, more details in next page. The NASA Ranger 9 probe made a hard impact on Alphonsus in March 1965. Alphonsus is also an object of LTP (lunar transient phenomena).

Imbrian Period
2001.03.25 !2j4S LIT Age 3 days. C9 * LE12.5 + CPSSO V2 soe

Note that in T130, the crater trio and their surroundings are modified by a radial pattern of grooves and ridges known as Imbrium Sculpture, formed from a hurricane of ejecta at low angles during the giant Imbrium impact. This marks the beginning of the Imbrian period in about 3.8 billion years ago.

Alpetragius 4.50 W 16.00 S

A bowl-shape crater, 39 km in diameter, 3900 m deep. It has a central mountain cone, probably oversized by post-volcanic eruptions inside the crater.

A crater, 34 km in diameter. The nearby chain of craterlets is Catena Davy, details in Map 31

Ptolemaeus, Alphonsus, Davy 2004.06,26 13:32 UT Age 9 days. 10-in f/6 Newtonian + 2.5X + ToUcam

The craters inside Alphonsus

At least 10 dark halo craters are inside Alphonsus. Some of them along the eastern inner edge of Alphonsus are highlighted in the right image:

Ravi 1.9° W 12.5° S diameter 2.5 km Monira 1.7° W 12.6° S diameter 2 km José 1.6° W 12.7° S diameter 2 km Soraya 1.6° W 12.9° S diameter 2 km No. 5 and 6 bear no formal names.

These craters are volcanic according to a study report http://www.lpi.usra.edu/meetings/lpsc2005/pdf/2344.pdl. The dark halos around them are DMD (dark mantle deposits |Map 9), and the adjacent connecting rilles are lava channels.

The arrow points to the elongated crater Chang-Ngo at 2.10 W 12.70 S, length 3 km. It is of impact origin, probably created by an impactor which orbited around Earth but then spiraled into the Moon region and hit the Moon at grazing angle. The floor of Chang-Ngo appears scalloped, possibly due to the "rubble-pile" nature of the impactor which disrupted into fragments on its way towards the Moon. Several of the fragments hit to form Chang-Ngo, other fragments hit to form the chain of craterlets next to Chang-Ngo.

South Polar Pit
Above: The craters and rilles inside Alphonsus. South is up.
Left: Crater Chang-Ngo seen from a 10-inch telescope. It is named after a lady in a Chinese myth. The X indicates the impact site of Ranger 9 probe.

l.if 2004.08.07 -20:36UT Age 22 days. 10-in f/6 Newtonian + 5X + ToUcam

Rupes Recta 7.80 W 22.10 S

Also called the Straight Wall, 134 km long, 2~3 km in width. It casts striking shadow shortly after the first quarter. Rupes Recta is a fault possibly resulted from the subsidence of lava in Mare Nubium. Its western side slopes down by about 300 m. Indeed Rupes Recta is not a sharp cliff as appeared in telescopes. Its average gradient is under 100. Its steepest slope is roughly 300.

Rima Birt 9.00 W 21.00 S

A 50-km rille near crater Birt (diameter 16 km) and running in parallel with Rupes Recta. Its north end connects the small crater Birt E. Its south end connects Birt F.

Imaging Rupes Recta Moon
Rupes Recta, Rima Birt, Thebit, Arzachel 2004.06.26 13:53 UT Age 9 days. 10-in f/6 Newtonian + 2.5X + ToUcarn

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