Category: Star Clusters

(this is my first sketch and I will be so proud of submitting it)

NGC 457 (also known as the Owl Cluster) is an open star cluster in the constellation Cassiopeia.
Scope:8” C8-SGT celestron

Magnification:48 – 25mm
Magnitude:6.4

Media : white paper with black pencil (inverted)
Date: october 2012
Location:Sufi abad- Semnan- Iran
Sketch by: Sunrise
Note: this is a big chance to have a wonderful night with good friends and sketching dark sky after a busy week. And I had this chance… with special thanks to my dear friends.

Sunrise

2012 08 20, 1017 UT – NGC1907 and M38/NGC1912

Erika Rix – Liberty Hill, Texas

www.pcwobservatory.com
AT6RC f/9 1370mm, LXD75, 13mm Ethos, 105x

70F, 71% H, calm/clear, Pickering 6, T 2/6

NGC1907

Open cluster in the constellation Auriga containing 30+ stars, 05h 28.0m, +35deg19´, 0.6´, m8.2v, distance 4500 ly

M38/NGC1912

Open cluster in the constellation Auriga containing 100+ stars, 05h 28.7m, +35deg50´, 20´, m6.4v, distance 4200 ly, calculated diameter 21 ly.

M38 is located within 2.3 degrees of M36 and was discovered by Giovanni Batista Hodierna before 1654 then independently discovered by Le Gentil in 1749. Messier later catalogued it in 1764. It’s a beautiful open cluster of approximately 100 member stars that forms almost an obtuse isosceles triangle with Elnath and Theta Aurigae. It was only after sketching this beauty that I noticed an “X” asterism within it. Turning my sketch upside down, the “cross” was very evident with a pair of stars in each arm of the cross.

I opted to use my 100 degree apparent field of view 13mm Ethos for this observation specifically so that I could include NGC1907 in the same field of view as its northern companion, M38. At 105x magnification, this small compact open cluster resembles a stellar lenticular galaxy set in the middle and slightly south of stars HIP25476 (giant at 6.5m) and HIP25733 (variable multiple star at 6.75m). There are close to 30 9th to 12th magnitude stars within it, but I could only plot around 10 within the hazy backdrop of this cluster at 105x magnification using the 6-inch RC. With more aperture and a small increase in magnification, an observer will be able to pick out close to 30 stars and star chains within this object.

Sketches created with AL template, #2 graphite pencil, loaded blending stump with charcoal, super-fine Faber-Castell Pitt artist pen “S”, 0.5mm mechanical pencil.

Object: Latysev 1 (possible moving cluster, Ari)
Date: 27. October 2006.
UT.: –
Equipment: 10×80 TZK binocular
Mag.: 10x
FOV: 6˚ x 6˚
Observer: János Gábor Kernya
Location: Astronomical Observatory, Baja, Hungary

Latysev 1:
„This is a possible moving cluster of only five stars, first suggested by Latyshev (1972). It was identified by considering the space motion of several nearby (GJ, or Gliese Catalogue) stars in this area. These 5 stars are spread over an area of 5˚ by 6˚, and are GJ 112 = HD 17190, GJ 113 = HD 17382, GJ 113.1 = VY Ari, GJ 118.2A = HD 18143 (one of three components), and GJ 120.2 = 51 Ari. The magnitude range is from V = 6.72 (51 Ari) to V = 7.81 (GJ 112), summing to V = 5.45 and B = 6.21.”

„It is interesting to note that three of these stars, GJ 112, GJ 113.1 and GJ 120.2, were also identified as members of a possible moving cluster “[AO84] III”, in a later study by Agekyan and Orlov [1984]. Therefore, if both of these groups are considered as real physical groups, Latyshev 1 should probably be considered a part of [AO84] III.”

Brent A. Archinal – Steven J. Hynes: Star Clusters
(Willmann-Bell, Inc.)

(Original text is in portuguese. English translation is at the bottom of the post.)

Nome do objeto: M7/NGC6475 ou aglomerado de Ptolomeu;
Tipo de objeto: Aglomerado aberto
Local de observação: São Paulo, Brasil.
Data: 21 Julho de 2012, o2:05 UTC;
10° C, atmosfera calma, uma leve névoa.
Material utilizado: lápis Steadtler Mars Lumograph ( HB ao 8B ), papel Canson 200g/m2 cor creme, compasso, régua e esquadros.
Telescópio: Maksutov 90mm Skywatcher, ocular superploss 40mm ( 31,25x), diagonal dieletric Willian Optics , buscadora GSO 8×50.

Aproveitando o céu razoável, com uma tênue névoa.
O maksutov 90mm skywatcher ficou aclimatando por mais de uma hora e isso realmente dá diferença na observação.
O alvo desta madrugada foi outro agloemerado aberto do Escorpião e bem ao lado de M6 e das estrelas Shaula e Lesath.

A parte correspondente ao campo de visão da ocular teve as cores invertida no GIMP.

http://rabiscandoouniverso.blogspot.com.br/

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English Translation by google translator

Object Name: M7/NGC6475 or cluster of Ptolemy;
Object type: open cluster
Local note: Sao Paulo, Brazil.
Date: July 21, 2012, o2: 05 UTC;
10 ° C, calm, a light mist.
Material used: pencil Steadtler Lumograph Mars (HB to 8B), Canson paper 200g/m2 cream, compass, ruler and squares.
Telescope: Skywatcher Maksutov 90mm, 40mm eyepiece superploss (31.25 x) dieletric William Optics diagonal, 8×50 finder GSO.

Taking the sky reasonable, with a faint mist.
The Maksutov 90mm skywatcher was acclimating for over an hour and this actually makes the difference in the observation.
The target this morning was another agloemerado open Scorpio and right next to M6 and stars Shaula and Lesath.

The part corresponding to the eyepiece field of view had inverted the colors in GIMP.

http://rabiscandoouniverso.blogspot.com.br/