Ptolemaeus and Surroundings

Sketch of Ptolemaeus and Surroundings

Sketch of Ptolemaeus and Surroundings
Move mouse over sketch to see labels. Click image for larger version.

Observation Notes:

Despite the bad seeing, Ptolemaeus and friends were large and stark enough to put on a good show at 120X. An interesting pillar of shadow within Ptolemaeus seemed bulbous at its tip. It seems likely that this little feature is caused by crater Ammonius. Spörer was a fairly rugged crater compared to deep Herschel. Lunar curvature was beautifully obvious across Ptolemaeus' expansive floor.

SubjectPtolemaeus and Surroundings
Position9.2°S, 1.8°W
Phase/Age8.1 Days / 57% Illuminated
Size*Ptolemaeus: 153 km dia x 2400 m depth
Ammonius: 9 km dia x 1850 m depth
Alphonsus B
Herschel: 41 km dia x 3770 m depth
Spörer: 28 km dia x 310 m depth
Gylden: 47 km dia
Date/TimeAUG 27, 2009, 10:00 PM MST (AUG 28, 2009, 05:00 UT)
Observing Loc.Flagstaff, AZ - Home
InstrumentOrion SkyQuest XT8 (203 mm dia./1200 mm F/L)
Eyepieces/Mag.Pentax XW10 (120X)
ConditionsMostly clear, calm
SeeingAnt. IV
SourcesAtlas of the Moon by Antoní­n Rükl 2004
* Based on published data.

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About this Entry

This page contains a single entry by Jeremy Perez published on November 3, 2009 12:30 AM.

Hickson 92/Arp 319 - Stephan's Quintet was the previous entry in this blog.

Drawn to the UniverseNOV 2009 - Ptolemaeus and Surroundings is the next entry in this blog.

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