Astrophotography by Anthony Ayiomamitis

Lunar Image Gallery - Crater Langrenus

Named after the 17th century Belgian engineer and mathematician Michel Florent von Langren, this 127-km wide circular formation on the eastern bank of Mare Fecundidatis is a stunning sight through a telescope owing to its twin central peaks and steep circular walls as evidenced by the image below. Some tormentation is visible with the northern half of the crater floor whereas the southern half is relatively smooth. As indicated by the shadows, the twin central peaks which measure approximately 1000 meters in height are the most dominant and impressive feature of this crater. Of interest is also the ray system which is characterized with this crater.


Image Details
Crater Langrenus
Imaging Details
Feature:
Crater Petavius

Quadrant:
S/E

Lunar Coordinates:
8.9° S 61.1° E

Length:
127.0 km

Height:
2.6 km

Lunation Age:
17d 08h 11m

Phase:
92.6°

Diameter:
31.78'

Magnitude:
-11.9

Rukl:
49
Date:
Oct 20, 2005
02:16 - 02:19 UT+3


Location:
Athens, Greece

Equipment:
AP 160 f/7.5 StarFire EDF
TeleVue 3X Barlow
Losmandy G-11 GEM
Philips ToUCam PCVC 740k
Baader UV/IR-Cut Filter (1.25")


Video Imaging:
1 AVI @ 10 fps (1500 frames)
Frame Rate : 10 fps
Exposure : 1/33 sec
Brightness : 50%
Contrast : 50%
Gamma : 50%
Saturation : 50%
Gain : 50%
Mode : RGB

Software:
K3CCDTools V2.4.9.895
HandyAVI V1.7
Registax V2.1.0.0
Photoshop CS-II


Processing:
Selective Sampling (54/1500)
Registration & Alignment
Average Combine
JPG Compression