globular – Page 13 – Astronomy Sketch of the Day

Globular Magnificence

M15 (NGC 7078), a bright globular cluster in Pegasus
Sketch and Details by Manuel Angel Pacheco Aguilar

* M15/NGC 7078
* Messier
* Fuente de Piedra, Málaga (Spain)
* 17/10/2009 (23h45m)

Material used:
Pencil and paper
Post Processing in Photoshop CS2

Instrument:
Celestron Telescope S / C 150mm f10 Nextstar and Orion Expanse eyepiece 15 mm 66 º (100x)

Atmospheric conditions:
Transparency good
Seeing: III (I: very bad – IV: very good)

Manuel Angel Pacheco Aguilar

Globular or Open Cluster?

Galactic Cluster M11 in Scutum
Sketch and Details by Per-Jonny Bremseth

(Double click image for enlarged view)

Hey!

I send you M.11, “Globular or open cluster?”

This cluster is very special and interesting to observe with
small telescopes. Visually it looks like a fine, open cluster, but
on photos like a globular. I really dont know its true nature.
With its two “wings” of mostly faint stars, M.11 is real nice!

The observation was made with crayons (watercolours) on
black paper only

Observing place: outside Trondheim city, Norway.
More info on my sketch!

Per-Jonny Bremseth

A Very Close Globular in Scorpius

M4 (NGC 6121) a large nearby globular cluster in Scorpius
Sketch and Details by Jorge Arranz

Hello,

Here is my sketch of M4, globular cluster in Scorpius, and second nearest to Earth, just after FSR 1767.

It was done from Bonilla, Cuenca, Spain, on 7/18/2009, using a Dob Lightbidge 10″, with a SWAN 15 mm eyepiece, giving 85x and 51’FOV.

Jorge Arranz

The Diamond Sphere

M13 (NGC 6205) The Great Globular star cluster in Hercules
Sketch and Details by Aleksander Cieśla

Hello!
This is sketch of Messier 13 – the Great Globular Cluster of Hercules from the Tapadla Defile – one of the main meeting place of observers from Wroclaw and parts.

Object: Messier 13
Scope: Schmidt-Cassegrain 5″ with LVW 13mm
Date: August 20th 2009.
Place: Tapadla Defile (Tąpadła). Bottom Silesia. Poland
Weather: Excellent. Seeing 4,5/5. Transparency 5/5.
Technique: Graphite pencil.
Tooling: GIMP2.

Aleksander Cieśla

Riding the Back of the Scorpion

M4 (NGC 6121) A large Globular cluster in Scorpius
Sketch and Details by Jeff Young

This is another sketch from our summer trip to Colorado. This one was quite late in the evening, and the temperature had dropped to only a few degrees above freezing (this in the middle of July, mind you). My hands had gotten cold enough that I was wearing fingerless gloves, which made twirling the pencil for the pinpoint stars a bit more difficult.

M4, globular cluster in Scorpius.

Sketched from high altitude (11,000’) on Hoosier Pass in Colorado.

HB and 3H pencil on white cardstock; scanned and inverted in Photoshop.

10” Dall-Kirkham (Mewlon) on AP600EGTO mount; UO 32Mk-80; 100X.

Cheers,

— Jeff.

A Faint Globular in the Serpent Bearer

NGC 6517, a faint globular cluster in Ophiuchus
Sketch and Details by Ferenc Lovró

Globular Cluster NGC 6517 in Ophiuchus

This is a very faint globular cluster that seems to be elongated in the N-S direction. Its core brightens softly, but it refuses to split up into stars even with HYPERLINK “http://www.graphitegalaxy.com/index.cgi?tutpage=AVERTED” averted vision and it also fails to respond to increasing magnifications. The object sits in the middle of some brighter stars that form a giant V-letter, pointing to the West.

Right Ascension: 18h 02m
Declination: -8° 58′
Constellation: Ophiuchus
Date/time: 2009.06.18 22:00 UT
Equipment: 12″ f/5 Newtonian
FoV: 16′ Magnification and filter(s): 250x
Seeing: 7/10 Transparency: 4/5
Location: Nádasdladány, Hungary
Observer: Ferenc Lovró

The Great Sagittarius Globular Cluster

M22 (NGC 6656) Globular Cluster
Sketch by Janis Romer and text by Frank McCabe

Janis has beautifully captured the ancient, large, bright gravity held group of stars known as M 22. Only Omega Centauri and 47 Tucanae of the 140 or so globular clusters are brighter. This beauty of more than 100,000 suns scintillates above the lid of the teapot in Sagittarius. Specifically it is located at R.A. 18h 36m; Dec. -23° 54′. It is well placed if you are not too far north. At a distance of 10,400 light years away it is close to us and shines at about 5th magnitude.
William Herschel may have been the first observer to recognize this patch of light as a cluster of faint stars.
As you can see in this fine sketch many stars are visible here using a telescope of 8″ aperture. Hundreds of the stars are as bright as 11th magnitude in M 22. Currently this globular cluster is receding from us at 144 km. /sec as it orbits the center of the Milky Way.

Onion Like

NGC 6535 Globular Cluster in Serpens
Sketch and Details by Ferenc Lovró

Globular Cluster NGC 6535

NGC 6535 is a tiny, faint globular cluster with four clearly separated stars on its Western side. However, I’m not sure whether they really do belong to the cluster, or they are just plain foreground stars. With several other stars resolved at its slightly brighter core, two of them can be seen clearly with this technique; while some others pop up here and there when the atmosphere calms down for some moments. The core, just like the globular itself is not really sphere-like, but rather looks a little bit like an onion, with the thinner part looking to the East.

Right Ascension: 18h 04m; Declination: -0° 18′
Constellation: Serpens
Date/time: 2009.06.18 21:30 UT
Equipment: 12″ f/5 Newtonian
FoV: 16′ Magnification and filter(s): 250x
Seeing: 7/10 Transparency: 4/5

Location:

Observer: Ferenc Lovró

Binocular Icon 57 : Sagitta and M71

The Constellation Sagitta and M71 (NGC 6838)
Sketch and Details by Rony De Laet

Sagitta is a small but fascinating constellation. It fits completely in a common pair of binoculars. A fine bonus is offered by the presence of the loose globular, M71. This globular is visible as a hazy spot between Gamma and Delta Sagittae. The object is flanked by two mag 11 stars, one NW of the cluster and one S of the cluster. My 15×70’s shows both Gamma and Delta in one field of view. The whole field gives a great sense of depth. Gamma Sagittae (near the left edge of the sketch) is relatively nearby with a distance of 260 l-y. Delta Sagittae’s distance is about 460 l-y. M71 on the other hand is 13.000 l-y away, hovering at the edge of the galactic plane. From our line of sight towards M71, we probably have to look through a large portion of the dust and gas clouds of the galactic plane. It occurs to me that a lot of M71’s light might be blocked by interstellar absorption.
My choice of binoculars was the 15×70 (compared to my 8×56) to conquer the sky glow of our midsummer nights.

Site : Bekkevoort, Belgium ( 51° N )
Date : June 16, 2009
Time : around 23.30UT
Binoculars : TS 15×70 Marine
FOV: 4.4°
Filter : none
Mount : Manfrotto tripod and head
Seeing : 3/5
Transp. : 2.5/5
Sky brightness : 19.49 magnitudes per square arc second near zenith (SQM reading).
Nelm: 5.3
Sketch Orientation: N up, W right.
Digital sketch made with Corel Paint Shop Pro X2, based on a raw pencil sketch.

(Note: if the sketch does look too dark on your monitor, try to darken the room.)
[click twice on image to see full size sketch]

In the Strings of the Lyre

M56 (NGC 6779) in the constellation Lyra
Sketch and Details by Kiminori Ikebe

M56 (NGC 6779) Globular Cluster in Lyra

This globular is northwest of Albireo. It is a mid-size globular and fairly bright. It is grainy but even at 190x it is not resolved clearly. The center is triangular-shaped with even brightness. The outlying area is faint and diffuse. There are some faint stars further out, but it is not certain whether they are members of this globular.
There is a double star north of the center. The faint outlying area is extensive in the north but almost no extension is detected in the south. However, there is a string of stars forming an arch in the south.

Difficulty level 3
Date of observation: 2000/08/28 00:47
Observing site