Onjala Observatory Mondaufnahmen

		CHAMÄLEON + ONJALA OBSERVATORY – LUNAR ATLAS Segment 09 A	back to OVERVIEW HOME CHAMÄLEON

Segment 9 A
Pyroclastic deposits and FF - crater Alphonsus, Gambart Region, the lunare cone Lassell D and putative plateaus Guericke/Opelt
Segment 9 B
Pyroclastic deposits in the craters Deslandres, Walter and Hell, FF - crater Pitatus and the "bisected" Birt domes
Segment 9 C
Capuanus, the concentric double crater Marth, Kies domes and the intrusive dome "The Helmet" (Plateau Agatharchides)
Segment 9 D
Landsberg region, Montes Riphaeus, kipuka Darney Chi, putative domecluster Euklides

Moon age 8.4 - 8.8 days - Illumination 54 - 58 %

Alphonsus
Cone Lassell
Guericke, Opelt

Moon age 9.6 - 9.8 days - Illumination 65 - 68 %

Alphonsus
Gambart
Cone Lassell
Guericke, Opelt
NEW 2016 Alphonsus, Gambart, Guericke/Opelt

Alphonsus - Moon age 8.4 days (54 %)

Alphonsus, with its diameter of 118 kilometer, is a magnificent example of a FF-Crater. It is located on the eastern edge of the Mare Nubium.

In some areas of the rilles system, small small volcanic vents are opened and produced small-scale pyroclastic deposits. These areas are NOT to be confused with the dark halo craters.

Lassell - Moon age 8.4 days (54 %)

The same illumination situation, but the field of view is shifted somewhat to the southwest. On the extreme right, the sun rises over the small lunar cone Lassell. On top of he image, the two "bisected" Birt domes become visible (more in segment 9 B).

Putative Megaplateau Opelt - Moon age 8.8 days (58 %)

Southwest of Guericke (58 km) lies a plateau like area, which differs in the "color" of the surrounding lava. On the surface a system of rilles is visible and therefore we would considered this as a putatively intrusive plateau.

On the western side of Guericke are two structures that would be classified as putative effusive domes, based on their morphology.

Moon age 9.6 days - Illumination 65 %

Alphonsus and Lassell - Moon age 9.6 days (65 %)

In this illumination situation the small pyroclastic deposits and their small "craters" are clearly visible. On the right side of the image is the lunar cone Lassell with a height of nearly 90 meters. For comparison: the relatively young crater Lassell D (bright ejecta) has a diameter of 1.9 kilometers.

Also interesting is the completely unusual shape of the central mountain of Alpetragius (40 km, directly south of Alphonsus) that fills a large portion of the crater floor. He is similar to domes and could be formed by swelling upof very viscous lava.

NEW 2016 Alphonsus and Lassell - Moon age 9.8 days (68 %)

Alphonsus and Lassell with similar illumination as above.

LRO Lassell Cone

The image shows a LRO image of the cone Lassell with a resolution of 125m/px.

NEW 2016 Gambart region - Moon age 9.6 days (65 %)

North of Fra Mauro (Apollo 14) and south of Gambart (25 km) is a larger intrusive dome with a diameter of 30 km and a height of 140 m. Its surface shows a system of rilles that indicate fromer stresses. Its flank angle is just below 0.6 degrees.

The upwarp is barely visible in our image but the rilles system can be clearly seen.

Southeast of Gambart 1 is another putatative dome-like upwarp. It has a size of about 6 x 12 km with a height of about 320 meters. It is marked with Gambart B in the image. See also the corresponding LRO imagese.

NEW 2016 Gambart region - Moon age 9.8 days (68 %)

Near the small craters Gambart B and C Gambart (12 km) are two further effusive domes Gambart 2 and Gambart 3.

Gambart 2 has a diameter of 19.5 kilometers and reaches a height of 190 meters. Gambart 3 is significantly smaller with only 9 kilometers. Its height is about 50 meters. In the west of Reinhold is another putative dome, marked with "A" in the image.

Direct southeast of Copernicus (93 km) there is a dome field without official name. It is covered with pyroclastic deposit and very similar toes the dome field of Marius Hills but much smaller.

NEW 2016 Gambart region - Moon age 9.8 days (68 %)

South of Gambart 2 and 3 is the large dome Gambart 1. It has a diameter of 30 km and its height is given as 140 meters. It is not clearly visible in our image but the position is marked. North of Gambart A is another putative dome marked with "A" in the image.

Southeast of Gambart 1 is another putative dome structure marked with "B". See also the LRO images below.

NEW 2016 LRO putative Gambart B

The LRO image of the putative Gambart structure at a resolution of 125 m/px.

NEW 2016 LRO Gambart region

« « LRO image of the Gambart 1 region at a resolution of 125 m/px.

« LRO image of the domes Gambart 2 and 3 at a resolution of 125 m/px. At the bottom of the image there is another Hortensius-type dome is visible. It has a diameter of about 4 km and a height of 70 meters.Gambart Dome 2 und 3.

Gambart region - Moon age 9.6 days (65 %)

North of Fra Mauro (Apollo 14) and south of Gambart (25 km) is a larger intrusive dome with a diameter of 30 kilometers. The height is just 140 meters and its surface shows a system of rilles. The slope angle is just under 0.6 degrees.

The upwarp is just visible on our image but the rilles system is clearly visible.

Gambart region - Moon age 9.6 days (65 %)

Near the small craters Gambart B and Gambart C (12 km) are two more domes Gambart 2 and Gambart 3, which are classified as effusive.

Gambart 2 has a diameter of 19.5 kilometers and a height of 190 meters. Gambart 3 is significantly smaller with only 9 kilometers in diameter. Its height is 50 meters. Near Gambart A another putative dome can be found, marked as Gambart X in the image.

Direct southeast of Copernicus (93 km) there is a dome field without official name. It is covered with pyroclastic deposits and very similar to the dome field of Marius Hills, but much smaller.

	Putative megaplateau Opelt - Moon age 9.6 days (65 %) On top of the image there is the putative intrusive megaplateau Opelt in a high-resolution view. A crossing rilles system on the surface is clearly visible. The two small putative effusive domes in the crater Guericke are also marked.

	NEW 2016 Putatives Megaplateau Opelt - Moon age 9.8 days (68 %) Like above at similar illumination.
	top of page


Segm. 01	Segm. 02	Segm. 03	Segm. 04	Segm. 05	Segm. 06	Segm. 07	Segm. 08	Segm. 09	Segm. 10	Segm. 11	Segm. 12