Object Name – M42
Object Type – Diffuse Nebula
Location – Arouca
Date – 13th Decembre 2012
Media – graphite pencil and white paper
Hello,
This is the object that I like most to see. It’s beautiful, bright and easy to locate. To made this sketch, I used my Orion XT12 and an Hyperion 24mm eyepiece. No filter used.
That wasn’t the best night to observe and I live in the middle of a small town (lots of light pollution).
Hope you enjoy!
Best regards
I send you here attached a collection of sketches made by the members of the Hungarian Astronomical Association (Magyar Csillagászati Egyesület). We have 42 members this year learning how to observe and sketch astronomical objects who are all very keen to learn. These sketches have been made after movies of Jupiter and Venus, so the observation circumstances were realistic.
I collected the best sketches and put together to see how skillful they are without many practice beforehand.
Very small galaxy that improved with lots of magnification. Bright core makes it an easy find even with low mag EP’s.
High level cloud made the transparency poor making it very difficult to see any detail but I could just make out a couple spiral arms inside the halo of the galaxy.
Very nice object and will go back to under better conditions.
Object Name: Chain of lunar craters Ptolemaeus, Alphonsus & Arzachel.
Media: Graphite pencil and white paper.
Explanation:
It is not always possible visual observation. Do not despair. It is a good time for to improve drawing techniques practicing, a “not observational” astronomical drawing its a good school for a beginners like me.
This sketch, not observational, is based on a Sergi Torrents (Sergit) astrophotography.
Ptolemaeus, Alphonsus and Arzachel are three craters beautiful geographically chained, but their names also are historically chained in to the science of astronomy.
Crater Ptolemaeus:
It forms a circular walled plain of 158 km in diameter to 1.8 º and 9.2 º South West which highlights the crater Ammonius of 9 km in diameter. Just above it the Ptolomeus B of17 Km.
Get the name of the Egyptian astronomer Claudius Ptolemy, who lived in the second century. He is known for his astronomical treatise Almagest, preserved by Arab astronomers, which is the most comprehensive ancient catalog of stars and was used by astronomers until the early Middle Ages. The Almagest describes the geocentric model and the apparent movement of the stars and planets.
Crater Alphonsus:
Circular crater 121 km in diameter. It contains a central mountain, craters, hills, and is crossed by Rimae Alphonsus.
It takes its name from Spanish King Alphonsus X, called the Wise, which ordered translate into Spanish language all the works of Al-Zarqali (Arzachel).
Crater Arzachel:
Circular crater 100 km in diameter, with high walls that reach 6,000 meters forming terraces. Highlights in its inside your central mountain 2,700 meters high and the crater Arzachel A of 10 km wide.
The name Arzachel is the English translation of the Spanish name Azarquiel, Spanish astronomer whose Arabic name is “Abu Ishaq Ibrahim ibn Yahya Al-Zarqali”. Autodidact astronomer, among his many contributions include a new type of astrolabe known as “astrolabe Zarqali” or Azafea that enables computation and astronomical observation at any latitude, very important for navigation at your time. Based on observations from his city, Toledo (Spain), between the years 1061-1080 compiled “The astronomical tables of Toledo” of such precision that even eight centuries later still were used by Pierre Simon de Laplace. Arzachel also corrected Ptolemy data on the length of the Mediterranean, according to Ptolemy was 62 º and Arzaquiel determined that it was only 42º, which ties to name of first crater of this chain.
My thanks to Sergit for letting me practice with their astrophotography.
Object Name (Mercury, Venus and the Moon)
Object Type (conjunction)
Location (Rocbaron Provence France)
Date (December 11th 2012 6:00 UT)
Media (Watercolour on 300gr paper plus white colour for planets)
It was quite cold this morning -1°C plus Mistral (north local wind)… but I would like to see again the rising of Mercury from my terrace.
Bottom-up we can see: Mercury near the chimney and Venus close to the Moon.
The watercolour was done on the spot, taking off the pigment for the planets with a brush when the paper was not yet dry. I add some hot coloration to the dark part of the very old Moon. Then I scanned the picture.
Object Name: M 46 / NGC 2438 / PK 231+4.1
Object Type: Open Cluster / Planetary Nebula / Planetary Nebula
Location: Scheidegg, Bavaria, Germany
Date: November 16th, 2012
Media: Graphite pencil on paper, digitally inverted
Additional information:
I am working on a personla project that involves the observation of planetary nebulae that have cosmic companions in close proximity (less than half a degree in angular distance). The sketch shows the most spectacular of that list of 14 PNs. b
I first observed NGC 2438 and PK 231+4.1 individually in 2010 from Tucson, AZ, USA. It was not until lately that I realized that both PNs as well as the biggest part of M 46 would fit in a single FOV when using low power.
On November 16th, I was able to observe that beautiful part of the sky with my 18″ Dobsonian telescope having superb conditions (fst 7m0). The sketch was made at 94x and I noted: M 46 and NGC 2438 are brilliant as usual. NGC 2438 shows a distinct ring structure and is very bright. Filters improve contrast. PK 231+4.1 is quite weak and definitely requires a filter to be seen. I first needed 226x in order to see that faint planetary nebula. Once spotted and located, it can also be seen at 94x together with the other two objects. PK 231+4.1 also shows some extent but is way smaller than NGC 2438.
Here is an sketch of the great planetary NGC 2392, the Eskimo Nebula in Gemini, from a cold but quite good night last winter. The following are my notes from tat night.
Easy to find starhopping from Delta Geminorum, the Eskimo Nebula is visible as a pale blue, fuzzy disk at low powers, in a rich star field. I get the best view at 222x. The 10.5 magnitude central star is easy to see and the basic structure of the nebula is also visible, with two concentric zones of different brightness. There is an inner, bright disk that envelops the central star, and a second, concentric halo of approximately double diameter. This second halo is fainter and smooth. But after some time observing, there’s something more: in some moments, I think I can see a bright arc in the Eastern limb of the inner disk. It appears and disappears, but always in the same place so I assume it’s a real detail.
Sketch: 2HB graphite pencil on white paper, scanned and processed with Photoshop CS3
Object Name: NGC 2392, the Eskimo Nebula
Object Type: Planetary nebula
Location: Asturias, Spain
Date: February 20th, 2012 23:30 UT
Instrument: 120mm f/8.3 refractor + Planetary 9mm + barlow 2x (222x)
NELM: 5.5, moderate light pollution
This 40 km diameter bright crater is always clearlly seen with a small telescope.
The inner surface of this crater looks like as to be painted with some dense bright white material .
Last winter , I observed / sketched this crater using my trusty 8 inches refractor at x340 .
While I was observing, the zet- black shadow of eastern rim more and more covered the flat bottom surface until the small round central peak only remaind,. …. that was impressive .