Category: Black Paper

Crater Davy and its Crater Chain in Davy Y

Crater Davy
Crater Davy

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.

Sketching:

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

Date: 03-29-2015, 00:00 – 03:00 UT


Temperature: -5°C (24° F) clear, calm

Seeing: Variable, Antoniadi III(fair)-IV (poor)

Colongitude: 11.6 °

Lunation: 8.4 days

Illumination: 64.7 %



Frank McCabe

Crater Davy - Labeled
Crater Davy – Labeled

Needle tip end of the crescent Moon

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.

J2-schamali -IMG_0345

J2-schamali -IMG_0344

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

South Korea

Posidonius Area

Posidonius Crater
Posidonius Crater

Hi all,

Friday evening just before the altocumulus clouds of the approaching depression covered the sky, I could do another sketch of the moon: This time it was crater Posidonius and its surroundings.

Ah, by the way, this time I tried a new pen: For the bright areas (e. g. the western rims of Posidonius A and J), I took a whitecoal pen instead of chalk pen. That provided much brighter contrast.

Another novelty for me: I didn’t use a diagonal but an Amici prism, so that the view in the eyepiece wasn’t mirrored at all. The view was a bit less bright, but for the moon it’s still bright enough.

Object Name: Posidonius
Object Type: Lunar Crater
Location: Germany, Dusseldorf area
Date: 2015-04-24, 2130-2205 CEST
Media: chalk pastel pencil, whitecoal pencil and charcoal pencil on black sketching cardbox
Telescope: Celestron Nexstar 127 SLT
Eyepiece: TS HR Planetary 7mm

Clear skies

Achim

Sirsalis & Damoiseau Craters

Sirsalis & Damoiseau Craters
Sirsalis & Damoiseau Craters

Aloha,

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

Thia Krach

Posidonius Crater

Posidonius Crater
Posidonius Crater

Hi all,

yesterday evening just before the altocumulus clouds of the approaching depression covered the sky, I could do another sketch of the moon: This time it was crater Posidonius and its surroundings.

Ah, by the way, this time I tried a new pen: For the bright areas (e. g. the western rims of Posidonius A and J), I took a whitecoal pen instead of chalk pen. That provided much brighter contrast.

Another novelty for me: I didn’t use a diagonal but an Amici prism, so that the view in the eyepiece wasn’t mirrored at all. The view was a bit less bright, but for the moon it’s still bright enough.

Object Name: Posidonius
Object Type: Lunar Crater
Location: Germany, Dusseldorf area
Date: 2015-04-24, 2130-2205 CEST
Media: chalk pastel pencil, whitecoal pencil and charcoal pencil on black sketching cardbox
Telescope: Celestron Nexstar 127 SLT
Eyepiece: TS HR Planetary 7mm

Clear skies

Achim

Solar Prominence from Ireland

Solar Prominence - 13 May 2015
Solar Prominence – 13 May 2015

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

Best regards
Deirdre

Deirdre Kelleghan

Astronomer
Artist
Educator

Website http://deirdrekelleghan.net

Twitter https://twitter.com/skysketcher
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Sunrise at Mare Crisium

Mare Crisium
Mare Crisium

Hi,

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

Clear skies

Achim

Partial Solar Eclipse – 20 March 2015

Partial Solar Eclipse - 20 March 2015

Hey ASOD!

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.

Best wishes from Per-Jonny Bremseth.

Craters Diophantus and Delisle

Craters Diophantus and Delisle
Craters Diophantus and Delisle
Craters Diophantus and Delisle - Labeled
Craters Diophantus and Delisle – Labeled

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.

Sketching:

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)
clear, breezy
Seeing: Antoniadi III
Co longitude: 38.7°
Lunation: 10.33 days
Illumination: 84.9 %
Phase: 45.8°

Frank McCabe