Crater Davy (35 km.) and the Davy crater chain (catena) were my targets for this evening of sketching and although the seeing and transparency were predicted to be above average that was not the case.
The Davy crater chain is 45-50 km. in extent. It arcs across the floor and eastern rim of crater Davy Y (70 km.). Since it does not line up with any impacts of note it is not likely a sequence of secondary craters. There is also no evidence of volcanic activity associated with this chain. Robert Wichman and Charles A. Wood as well as H. J. Melosh and E. A. Whitaker believe that a comet (or asteroid) may be responsible as it broke up while inside the Earth’s roche limit. As it went in on the moon like a train of meteors it would have created a chain of impacts. A paper published in 1994 by Melosh and Whitaker explains the hypothesis.
Crater Chains on the Moon: Records of Comets Split by the Earth’s Tides?; H. J. Melosh and E. A. Whitaker, Lunar and Planetary Lab, University of Arizona, Tucson, Az.
Black Artagain paper, white and black Conte’ pastel pencils, white Pearl eraser, blending stumps
Telescope 13.1” f/6 Dobsonian telescope on an equatorial drive platform at 332x with 6mm eyepiece
l like the crescent Moon shining on the western sky in remained blue,vermilion hue just after sun set.
lt was always looked as most mysterious, beautiful, or with some a feeling of affection.
Of course l used to see not the horizon alone but l see beyond over in my mind trillions of trillions of moons rising on over its parent planets maybe from in our own galaxy to in the Hubble Deep Fields galaxies. Also l think about trillions of advanced civilizations.
Observed; 2014. 10.29 ( Original eyepiece sketch)
Painted; 2015. 6.5
320mm refractor x270
Graphite pencils, water color, acrylic color, white/black paper
Moon limb span; 50km for [A], 50km for [B], [A]&[B] to be connected
I submit my most recent lunar sketch of Sirsalis & Damoiseau Craters at the western limb of the moon. What a wonderful area to explore with interesting concentric craters of Damoiseau & the double crater of Sirsalis at this angle of light. Unseen Grimaldi is in the darkness to the west.
Object: Lunar craters Sirsalis & Damoiseau @ ~13 days lunation
Telescope: 12.5” Portaball 9mm Nagler 169X
Location: Maui Hawaii, 4000 ft elevation
Date: 2/4/12 7:45pm
Medium: Black art paper, white & black charcoal
I went out to sketch the AR 2339 in h-alpha but when I saw this massive Hedgerow type prominence on the limb it had to be done.
PST 40 halpha scope ,8mm eyepiece / 50X
Pastels and Conte on black paper. 13:33 UT May 13th 2015
Bray, Co Wicklow, Ireland
find attached a charcoal and pastel sketch of the sunrise at Mare Crisium. I hope you like it.
Object Name: Mare Crisium, eastern part
Object Type: Lunar Maria
Location: Germany, Dusseldorf area
Date: 2015-03-22, 2020-2100 CET
Media: chalk pastel pencil and charcoal pencil on black sketching cardbox
Telescope: Celestron Nexstar 127 SLT
Eyepiece: TS HR Planetary 7mm
I send you the great eclipse of the sun from Trondheim, Norway.
with 94% of the sun eclipsed!
I also measured the temperature (in shadow) before and during
the eclipse. The sky was clean until just before the end of the partial
phase. I enjoyed the max. partial phase very much. Beautiful!!!
I used crayons (watercolor) on black paper.
On the western side of Mare Imbrium are craters Diophantus (19 km.) and Delisle (25 km.) with mons Delisle in between and closer to the crater of the same name. A dorsum or ridge here is perhaps a buried crater rim and creates a sharp edge curving demarcation on the terminator side of the Moon at the time of sketching. Some of the massifs in this region such as mons La Hire (1.5 km. high), mons Vinogradov (1.4 km.) and mons Delisle( 0.8km. high) are described by some geologists as likely left over remnants from the rings of the Imbrium impact. Additional craters seen at this observation included Euler (2.8 km.), Artsimovich (9 km.), Gruithuisen (17 km.) and Heis (15 km.)and numerous smaller unnamed.
For this sketch I used: black Strathmore 400 Artagain paper, 9”x 12”, white and black Conte’pastel pencils, a soft charcoal pencil, brush and a blending stump.
Telescope: 13.1 inch f/6 Dobsonian and 9mm eyepiece 221x
Date: 01-31-2015, 03:10 – 04:25 UT
Temperature: -7°C (20°F)
Seeing: Antoniadi III
Co longitude: 38.7°
Lunation: 10.33 days
Illumination: 84.9 %