CHAMÄLEON + ONJALA OBSERVATORY  LUNAR ATLAS
Segment 05 C
back to OVERVIEW
HOME CHAMÄLEON


  Segment 5 A
FF - crater Posidonius, Lava borders in Mare Tranquilitatis, The Apollo 17 region with its pyroclastic deposits and the lunar cones Isis and Osiris.
Segment 5 B
Gardner megaplateau, Domefield Cauchy west, Jansen and Carrel, Menelaus and Arago
Segment 5 C
Hyginus, Murchison, Manilius and Yangel (Sinus Fidei)
Segment 5 D
Aristillus, Autolycus, Rima Hadley (Apollo 15), Palus Putredinus, Valentine Dome

Moon age 7.5 - 8.8 days - Illumination 44 - 59 %

Hyginus Region
Domes Manilius and Yangel 1

NEW 2016 Manilius und Yangel 1
NEW 2016 Animation Domes Manilius and Yangel in a
time differnce of 24h illumination
Moon age 8.5 - 8.8 days - Illumination 54 - 59 %

Hyginus region
Murchison
NEW 2016 Murchinson
NEW 2016 Domes Manilius and Yangel 1

NEW 2016 Pyroclastic deposit Sinus Aestum
 
Hyginus region - Moon age 7.5 days (44 %)

Hyginus and Triesnecker are probably one of the most exciting landscapes on the front of the Moon. The whole area in the north of Triesnecker is interpreted as a complex volcanic area. Hyginus (10.5 km) is interpreted as one of the few larger structures, as a volcanic caldera. It is located on a 35 km wide but extremely flat hump (Hyginus 2) with a height of only 30 meters which can not be seen in this image.

Further to the north there is a small effusive dome - Hyginus 1. It has a diameter of just over 9 kilometers and a summit vent at a height of about 70 meters. The rille to the west and east of Hyginus is about 1.5 to 2 kilometers deep. The Hyginus rille is roughly parallel to the Rima Ariadaeus and both point to the center of the Imbrium basin.
Hyginus region + pyroclastic deposit Mare Vaporum - Moon age 7.5 days (44 %)

The mountainous terrain north of Hyginus is covered with a layer of volcanic ash and named Mare Vaporum pyroclastic deposit, one of the largest deposits on the front of the moon.

The entire area is widely covered with ejecta of the Imbrium impact event.
LRO height profile of Hyginus and Hyginus A

One of the strong arguments to classify Hyginus as a volcanic caldera and not as a normal impact crater can be found in its height profile. While even much smaller craters, as in the example Hyginus A, show a clear crater wall there is no wall at Hyginus.

The image to the left shows a comparison of the height profiles of Hyginus and Hyginus A. It was measured in LRO images with a resolution of 125 m/px.
NEW 2016 Manilius and Yangel Dome - Moon age 7.5 days (44 %)

West of Manilius (39 km) are two very different domes and some dark halo craters. Manilius 1 is a flat dome with a diameter of about 10 kilometers and a height of 180 meters. Its flank angle is approximately 2 degrees. It is very similar to the C2 domes in Mare Traquilitatis such as Cauchy Tau and Omega. Several summit openings are visible. East of Ma 1 three other putative dome structures are visible, marked with 1 , 2 , 3 and 4. Number 5 marks a dark halo crater.

Yangel 1 is a small steep cone with a diameter 5 kilometers and a height of 620 meters. It was built over a period of several years of very slow-moving lava. Afterwards its surface was covered with a layer of pyroclastic ash. Its flank angle is approximately 13.5 degrees and it is similar to the dome Liebig 1 and the domes of the Marius Hills. In this illumination situation Yangel throws 1 a spectacular shadow.
Just south of the crater Yangel the Rima Yangel intersects an isolated hilly area. Yangel X is another dome-like structure, see the following two LRO images.
 
NEW 2016 LRO Manilius 1 - 4 and Yangel Dome X

« «LRO image with a resolution of 125m/px of the 4 putativen domes. Also marked is the dark halo crater with a diameter of about 2 kilometers. Dome 4 is similar to the Dome Kies phi and the Hortensius domes. There is another caldera with pyroclastic deposits in north-westerly direction. 

« This LRO image shows the putative dome Yangel X at a resolution of 32 m / px. It has a size of 3.5 x 5km and a height of about 170m.
Manilius and Yangel dome - Moon age 7.5 days (44 %)

West of Manilius (39 km) are two very different domes and some dark halo craters. Manilius 1 is a flat dome with a diameter of about 10 kilometers and a height of 180 meters. Its flank angle is approximately 2 degrees. It is very similar to the C2 domes in Mare Traquilitatis such as Cauchy Tau and Omega.

Yangel 1 is a small steep cone of 5 kilometers in diameter and with a height of 620 meters. It was formed over a period of several years by very slow-moving lava. Its surface was then covered with a layer of pyroclastic ash. Its flank angle is approximately 13.5 degrees and it is similar to the dome Liebig 1 and the domes of the Marius Hills.
NEW 2016 Manilius and Yangel Dome

The image shows an animation of the Dome Manilius 1 and Yangel 1 and compared the illumination situation at an intervals of 24 hours. Pay attention to the differences in the shadows of the dome Yangel 1 and the visibility of the wrinkle ridges in Mare Vaporum and the dome Manilius 1.
LRO Manilius -Yangel and dark halo crater

The LRO image shows the dark halo crater around Manilius with a resolution of 125 m/px.
Hyginus region and Mainilius domes - Moon age 7.8 days (48 %)

The mosaic shows Hyginus 1 (summit crater) and Manilius 1 at an illumination of 48 %, almost exactly in the crescent phase. Manilius 1 shows two small summit craters. Directly to the east there is an object marked with a question mark. We would classify it as a putative dome. It is similar to Yangel 1 but much smaller.

The Mare Vaporum pyroclastic deposit is clearly visible in this image.

Moon age 8.5 days - Illumination 54 %
 
Hyginus region + Pyroclastic deposit Mare Vaporum - Moon age 8.5 days (54 %)

The Mare Vaporum pyroclastic deposit can be very good seen in this image.

The more than 15 small craters which overlap Rima Hyginus must have been formed after the ceiling collapse of the lava channel.
Murchison - Moon age 8.5 days (54 %)

Inside of the crater Murchison (58 km), which is located in the Sinus Medii, are two putative domes - Murchison Murchison 1 and 2. Mu 1 shows under appropriate illumination a small summit crater and it is bigger than Mu 2. Mu 1 has a diameter of about 8.5 kilometers and a height of about 200 meters, Mu 2 is significantly smaller with 6 kilometers in diameter and a height of 140 meters.

Near the crater Ukert (23 km) you can see remnants of the large Imbrium impact event. The parallel structures are aligned on the Imbrium center and can be traced in straight lines to the large craters Ptolemy and Albategnius. The term "Imbrium Sculpture" was introduced in the middle of the last century by Gilbert, a lunar geologist.
Murchison - Moon age 8.5 days (54 %)

Murchison 1 and 2 together with the pyroclastic deposits of the Mare Vaporum.
Murchison - Moon age 8.5 days (54 %)

Murchison 1 and 2 at similar illumination.

Moon age 8.8 days - Illumination 59 %
 
NEW 2016 Murchison - Moon age 8.8 days (59 %)

Murchison 1 and 2, together with the pyroclastic deposits of Mare Vaporum, at increasing illumination. Below the image center around the crater Ukert are structures of the "Imbrium Sculpture". Murchison 2 is putative.
NEW 2016 Yangel 1 - Moon age 8.8 days (59 %)

The dome Manilius 1 (nearly unvisible) and Yangel 1 at a moon age of about 9 days. The two pyroclastic areas in Mare Vaporum and Sinus Aestum are visible.
NEW 2016 Pyroclastic Sinus Aestum - Moon age 8.8 days (59 %)

Sinus Aestum and the large pyroclastic ash deposits in Sinus Aestum .
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
All Images - otherwise marked - and all Content are © by Franz Hofmann + Wolfgang Paech