IWLOP #037 – Theophilus (Sinus Asperitatis & Mare Nectaris Area)
The three craters - Theophilus, Cyrillus and Catharina - are all about 100 km in diameter and form a trio bordering the edge of Mare Nectaris.
Location: 11.4 S 26-22 E Origin: Impact Size: 100 km Rukl: 46 Type: Complex Crater (CC)
Objects: Theophilus, Sinus Asperitatis, Mädler
Others Identified: Cyrillus, Ibn Rushd, Kant, Mons Penck
Observation 1:
Location: Home
Date: 2019-06-08
Time: 11:10 PM ADT
Equipment: 10" Meade SCT
Eyepiece: Explore Scientific 12mm with 90° FOV + x2 Barlow
Magnification: x416
Seeing: Very Good (4)
Transparency: Good (3)
SQM: 19.41
Temperature: 15° C - 10° C, no wind or clouds
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R1: Theophilus located between Mare Nectaris and Sinus Asperitatis, and above Cyrillus. R2: Theophilus had a terraced wall, flat floor and a 4-part central peak. R3: The continuous ejecta deposit went from Theophilus into the Sinus. R4: Mädler was oval-shaped, much smaller, and steep-sided with a smooth dark floor. |
Observation 2:
Location: Home
Date: 2020-05-25
Time: 9:35 PM ADT
Equipment: 6" Dobsonian
Eyepiece: Meade Super Plössl 9.7mm + x2 Barlow
Magnification: x250
Seeing: Good (3)
Transparency: Good (3)
C1: The landscape north of Theophilus looked like a very rough lava flow for the same distance as the crater radius. There were no deep ridges detectable in the 'flow'.