Five Stellar Gothams

Hickson 58

Hickson 58
By Bill Ferris

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This sketch of the galaxy cluster, Hickson 58 was made by Bill Ferris using his 18 inch Obsession. He used a 12 mm Nagler T4, which provides a magnification of 199X when mated with the TeleVue Paracorr. Following are Bill’s notes on the observation:

Hickson 58 is populated by five stellar gothams ranging in brightness from 13.9 to 15.4 magnitude; all in the blue. Centered within the group is NGC 3822, a 14.1 (B) magnitude galaxy also known at Hickson 58A. Its stellar core is embedded within a 1′.5 by 1′ oval nebulosity of even brightness and aligned north to south. About 3′ to the east, Hickson 58B emerges from the darkness. This 13.9 (B) magnitude barred spiral is better known as NGC 3825 and, as with its neighbors, features a stellar core. The surrounding 2′.5 by 1′.5 nebulosity becomes gradually brighter toward the middle. NGC 3825 is flanked to the southwest by a 12th magnitude star and to the northeast by a 13th magnitude ember. About 5′ west of NGC 3822, the 14.3 (B) magnitude oval form of NGC 3817 (Hickson 58C) comes into view. This barred spiral displays a stellar core within a delicate 1′.4 by 1′, east to west, oval. A 14th magnitude GSC star stands entry 1′.5 to the west. The faint pairing north of center in my sketch, which renders a 199X view in the 18-inch, are Hicksons 58D and 58E. The 14.8 (B) magnitude elliptical galaxy NGC 3819 lies 4′.6 north of NGC 3822. This tiny, 0′.8 by 0′.5 galaxy is Hickson 58D. Another 2′ to the north stands Hickson 58E. This 15.4 (B) magnitude galaxy is also known as NGC 3820. It is similar in size to NGC 3819 and has the same north-south alignment.


The original entry for this observation and sketch can be found at Bill’s website:Cosmic Voyage: Hickson 58Additional detailed information on the cluster may also be found at the WikiSky entry for NGC 3822 (Hickson 58A)

Three Fuzzy Friends

M96, M105 and NGC 3384

M96, M105 and NGC 3384
By Jeremy Perez

M96, M105 and NGC 3384

These three galaxies were kind enough to fit in the field of view together. The two galaxies on the north side, M105 and NGC 3384 appeared about 10′ apart, nucleus to nucleus. Their nucleii were softly stellar in appearance. M105 appeared basically circular and the brighter of the two, while NGC 3384 was elongated north-northeast to south-southwest. M96 was about 50′ to the south. It was the largest and brightest of the three galaxies, elongated northwest to southeast. It didn’t have the same stellar nucleus as the other two, it was a bright nucleus, but not as concentrated. Observing all three galaxies at 120X didn’t expose more detail, mostly just verified what I had already seen at 37X.

Factoids:
M96 is a type Sa spiral galaxy that is the brightest of the Leo 1 group of galaxies, which includes M95 and M105 as well as other fainter galaxies. It lies about 38 million light years away and it’s bright inner portion extends about 66,000 light years in diameter. It has a fainter outer ring which extend that diameter to about 100,000 light years. The inner disk is composed of an old population of yellow stars. The galaxy contains a significant amount of dust and blue knots of star forming regions. It was discovered by Pierre Mechain in 1781 and thus cataloged by Charles Messier a few days later.

M105 is an E1 elliptical galaxy that is a member of this same galaxy group and so is also about 38 million light years distant. It is often studied as a standard representative of elliptical galaxies. A Hubble Space Telescope survey of the galaxy has shown it to contain a massive central object weighing in at 50 million solar masses. M105 is moving away from us at 752 km/sec. It was discovered by Pierre Mechain a few days after M96, but for some reason wasn’t included in Charles Messier’s catalog. It was added as M105 in 1947 by Helen Sawyer Hogg along with M106 and M107.

NGC 3384 is an E7 elliptical galaxy that contains what appears to be a central bar. It also appears to be a member of the Leo 1 galaxy group.

Subject M96 (NGC 3368), M105 (NGC ), NGC 3384
Classification Spiral and Eliptical Galaxies
Position* Leo:
M96: [RA: 10:46.8 / Dec: +11:49]
M105: [RA: 10:47.8 / Dec: +12:35]
NGC 3384: [RA: 10:48.3 / Dec: +12:38]
Size* M96: 7.1′ x 5.1′ / M105: 4.5′ x 4.0′ / NGC 3384: 5.9′ x 2.6′
Brightness* M96: 9.2 / M105: 9.3 / NGC 3384: 10.0
Date/Time February 4, 2005 – 1:45 AM
(February 4, 2005 – 08:45 UT)
Observing Loc. Flagstaff, AZ – Home
Instrument Orion SVP 6LT Reflector (150 mm dia./1200 mm F/L)
Eyepieces/Mag. 32 mm (37X), 10 mm (120X)
Conditions Clear, 25?F
Seeing 3/10
Transparency Mag 5.2
Sources SEDS 
*Based on published data.

Milky Way in Cassiopeia

Milky Way in Cassiopeia

The Milky Way in Cassiopeia
By Rony De Laet

 This is a lawn chair observation of the Milky Way passing through Cassiopeia. The view was so beautiful that I wanted to capture it in a sketch. I studied the region for about 20 minutes before sketching. North is right in the sketch. The two patches on top of the view are the double cluster in Perseus. I tried to simulate the glow of the Milky Way as it crossed this mighty constellation.

Location : Bischofshofen, Austria
Date:  Dec. 25, 2006 , 21.00UT
Seeing:  4 on a scale of 5, Transparency : 4, Nelm : 5.1
Scope : naked eye

No Averted Imagination Required

NGC 2903

Galaxy NGC 2903
By Wade V. Corbei 

Finally after what seemed like forever and a day, I started to digitize some sketches from earlier this month.

NGC 2903 is a nice looking Spiral Galaxy found in the constellation Leo…a constellation that holds many great galaxies; and NGC 2903 is no exception. This is a fairly large, bright galaxy that shows some structure of the arms and a bright core.

Unlike many fainter galaxies, NGC 2903 is easily spotted and observed without averted vision…but averted vision will allow for some finer details to emerge. Surrounded by a fairly rich starfield, NGC 2903 is a must-see for those looking for galaxies that present themselves as more than a faint fuzzy in the EP.

Hats off for this Sombrero

M104

The Sombrero Galaxy
By Michael Vlasov

Messier 104, The Sombrero Galaxy

The Sombrero Galaxy is 50,000 light years across and 28 million light years away is about 50,000 Light years in diameter. A large and dusty spiral, it lies on the southern boundries of the Virgo Cluster of Galaxies. Deep imaging of M104 shows it to be surrounded by a halo of dust and gas extending up to 7-10 galactic diameters from the galaxy’s center.

Surreal Juxtaposition

IC 1633 

IC 1633

Elliptical Galaxy (cD) in Phoenix

Parks Astrolight EQ6 • 6″ f/6 Newtonian Reflector
7.5mm Parks Gold Series Plössl • 120x, 26′ Field of View
11 October 2007 • 06:30-07:15 UT

IC 1633 is the antithesis of NGC 55. It is located 1° northeast of 3rd-magnitude Beta (β) Phoenicis, half the distance between that star and 5th-magnitude Nu (ν) Phe. Small, and faint, its feeble glow is best detected with averted vision. In the eyepiece it is completely featureless. In reality, IC 1633 is a gargantuan elliptical galaxy lurking in the heart of galaxy cluster Abell 2877  (of which it is by far the most prominent member). Its distance from Earth is estimated at 325 million light-years! That fact alone, made this observation worthwhile.

As I observed this pale mist of ancient photons (and futilely scanned the field for other cluster members – or even a few more field stars), IC 1633 became entangled in the fire-blackened boughs of an oak tree victimized by the 2003 Cedar Fire. On a whim (and growing a little bored with my fruitless search for anything else to add to my sketch) I hastily added the twisted limbs to the drawing, providing a surreal juxtaposition of objects near and far.

James Dunlop apparently discovered IC 1633 during the 1820’s from the Brisbane Observatory at Paramatta, New South Wales, Australia. As this object failed to appear in the NGC, we may presume it was one of the (many) objects discovered by Dunlop that could not be recovered by John Herschel. In the Second Index Catalogue, DeLisle Stewart and Lewis Swift share credit for the discovery (or “re-discovery”) of IC 1633.

A Trio of Leo’s Finest

Leo Triplet

The Leo Triplet – M65, M66 and NGC 3628
By Michael Vlasov

This striking deep sky trio lies some 35 million light years away and consists of three spiral galaxies. Their varied appearance is due to the different angles they present to our point of view.

NGC 3628, at the top of Michael’s sketch, is seen edge-on and displays a bisecting dust lane. Deep astrophotography shows that the outer edges of this dust lane are strongly distorted by gravitational interactions with its other two neighbors.

M65 (lower right) is a normal Sa type spiral galaxy with tightly wound arms, a prominent central lens, and dust lane. There are some knots visible near the dust lane which may be areas of star formation. Although it appears to be gravitationally bound to it’s neighbors in the Leo Triplet (M66 and NGC 3628), it does not appear to have been structurally disturbed by any interactions.

M66 (lower left) is a spiral galaxy whose shape has been distorted by interactions with its Leo Triplet companions, giving the appearance that the arms are raising above the plane of the galaxy. There are many emission and reflective nebulae evident, showing active star forming regions. The dust in the core of M66 is thought to be heated by older stars, as opposed to younger stars as is usually the case.

Sources: SEDS – NGC 3628, M65, M66.

On a personal note: my sincere appreciation and thanks go to Jeremy Perez for his wonderful job of maintaining ASOD in my absence, as well as those contributors who have submitted their sketches and reports to this website while I was away.  You folks are great. 

Rich Handy- ASOD Webmaster

  

Grucian Propeller

NGC 7496

NGC 7496
By Eiji Kato

NGC 7496 is an 11th magnitude Seyfert Galaxy in Grus that displays a barred spiral structure. It is a member of the IC 1459 Grus Group and weighs in at about 80 Billion Solar Masses. This galaxy was discovered by Sir John Herschel in 1834 at the Cape of Good Hope with an 18-inch f/13 speculum telescope.

Sources:
The Deepsky Observer’s Companion Website
Gas dynamics in barred spiral galaxies. II – NGC 7496 and 289
NGCIC.org

Sculptor’s Reticulated Showpiece

NGC 55

NGC 55
Edge-on Barred Magellanic Galaxy in Sculptor
By Eric Graff

Parks Astrolight EQ6 • 6″ f/6 Newtonian Reflector
15mm Parks Gold Series Plössl • 60x, 52′ Field of View
11 October 2007 • 05:30-06:30 UT

The late Walter Scott Houston wrote, “Some deep-sky objects offer beautiful, breathtaking visual experiences. NGC 55 is one such object.” Christian Luginbuhl and Brian Skiff call this galaxy “one of the most interesting and detailed in the sky.” Stephen James O’Meara named it “one of the night sky’s finest wonders.” Clearly, this galaxy has something of a reputation. As I slewed my scope toward 2nd-magnitude Alpha (α) Phoenicis (my guide star for this particular object), I wondered if the view would live up to the high praise these respected observers offered up to this edge-on Magellanic-type galaxy on the southern border of Sculptor.

Centering the golden giant Alpha Phe in my 30mm eyepiece, I quickly located NGC 55 by offsetting my scope 2° west of Alpha and sweeping a little over 3° north. Star-hoppers may wish to follow a ragged line of 6th-7th magnitude stars northward from Alpha Phe and then west toward the galaxy.

Despite its southerly declination (culminating only 18° above my southern horizon), NGC 55 is indeed a stunning sight in the eyepiece. This large, bright galaxy displays a fascinating degree of detail including its three “nuclei”, extensive mottling (particularly in the bright, central region), and a reticulated network of dark lanes.

James Dunlop discovered NGC 55 on August 4, 1826. Distance estimates range from 4.2 million light-years upward toward 7 million light-years (with the smaller distance estimates being more current). Most astronomers place NGC 55 in the Sculptor Group of galaxies, but some have suggested that NGC 55 (together with NGC 300) are foreground objects and members of our own Local Group of galaxies.

Information provided by Eric Graff