Archive for October 2015

NGC 7128 – Open Cluster – Cygnus

October 24, 2015

Pencil sketch using a 10-inch Newtonian reflector @ 190x.  Roger IvesterFullSizeRender

Pencil sketch:  Inverted color 

Rogers NGC-7128a

Observer’s Challenge Link:  OCTOBER 2015 OBSERVERS CHALLENGE – NGC-7128

NGC 7128 – Open Cluster in Cygnus –  
Date: October 2015
Conditions: Very Good
NELM: 5.2
Telescope: 10-Inch Newtonian reflector
Eyepiece: 12 mm + 2x Barlow
Magnification: 190x
FOV: 0.32º – 19 arc minutes

Easy to locate and see at low magnification, appearing as a small concentrated round hazy spot, with several bright stars on the outer edges. When increasing the magnification to 190x about 13 stars could be counted encircling a hazy central region of fainter stars. At the higher magnification the cluster became octagonal in shape. I could count three pair of doubles in the outer ring. The brightest star is magnitude 11 on the SSE tip. The cluster was much smaller than I remembered when I observed it last on 9-27-93, using the same telescope and from the same site.

The late North Carolina amateur, Tom Lorenzin said: “small compressed and memorable! brighter members make a small pentagon.”    Roger Ivester

The following pencil sketch was made by Jaakko Saloranto of Finland, using a 4.5-inch Newtonian reflector @ 261x with a NELM of around 6.0. 

“Small 2.5′ cluster of ~10 stars magnitudes 11-13. Easily visible @ 38x (66′) as a small glow NW of 10th magnitude star. Sky conditions and weather: 20°F, humidity 84%, Aurora Borealis in the northern sky. SQM-L reading 20.05 aimed at the object with naked eye limiting magnitude around 6.0.”  

NGC7128

The following image was made by Dr. James Dire from Hawaii, using a 10-inch F/6 Newtonian Reflector and a SBIC ST-2000XCM CCD Camera.  Exposure 30 minutes… 

NGC7128

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NGC 7000 “The North America Nebula” Cygnus

October 13, 2015

 Las Vegas Astronomical Society Observer’s Challenge link: 

SEPTEMBER 2015 OBSERVERS CHALLENGE – NGC-7000-1

The following pencil sketch was made using a blank 5 x 8 notecard with a 10-inch Newtonian reflector telescope.  The observation, notes and sketch were made from my moderately light polluted backyard, located in the Foothills of North Carolina.    roger ivester

Scanned Image 160930002

 

NGC 7000 “The North America Nebula” Cygnus
Date: September 17, 2015
Conditions: Fair seeing with a NELM of 5.0

Telescope: 10-inch f/4.5 Newtonian Reflector
Sketch: 36x with an O-III Filter
FOV: 1.8º

A dark sky is preferred for this very large emission nebula, however, I’ve observed the North American to a satisfactory level on many occasions from my moderately light polluted backyard using my 10-inch reflector. An O-lll filter is essential when observing this object.

I found it necessary to place a commercial black cloth to shield ambient light from entering my eye, due to several unshielded streetlights in relative close proximity. After covering my head, the difference was amazing, as the outline of the nebula became much sharper and brighter.

The dark region known as “the Gulf of Mexico” is the most noticeable feature. At 36x and with a FOV of 1.8º much of the North American shape is visible. Open star cluster, NGC 6997, a sprinkling of faint stars is located in the “Ohio” region. If using an O-III or UHC filter while observing the North American Nebula, be sure to remove when observing this cluster.

IC 5070, “The Pelican Nebula” lies just to the west of NGC 7000. The Pelican was fairly easy to see, appearing as a large very faint diffuse region without any definite shape.   Roger Ivester

The following wide field image by Dr. James Dire of Hawaii using a Canon 30D camera with a 100 mm f/2 lens.  Exposure 30 minutes piggyback on a telescope.     

Dire image 1

The Cleveland County Astronomical Society Pays Tribute To Longtime Member, Marion “Rusty” McDonald: October 31, 1932 – October 2, 2015

October 5, 2015

Rusty McDonald was born in Shelby, North Carolina.  In 1955, after college, he moved to Los Angeles to work for Garrett AiResearch.  It was there that Rusty found and married the love of his life, Barbara Bergman.  In 1992, Rusty and Barbara moved back to Shelby, and became very active members of the CCAS.  It was with their association with the CCAS that both Debbie and I became very good friends with the McDonald’s, as well as many others of the astronomy club.  We feel it was a true honor and privilege to have known this wonderful couple, and become their friends.  It was in the mid-90’s that the famous telescope builder, John Dobson of the San Francisco Sidewalk Astronomers spent at least a week with the McDonald’s.  The Dobsonian Telescope Mount which is so popular today was named after Dobson.

Barbara passed away in October, 2000.

Rusty…you will certainly be missed by your wonderful family and many many friends!!!

Double click on photo’s to enlarge:

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Rusty was very proud of his Scottish Heritage.  Bagpiper, Mr. Mark Bosemiller was a part of the service today….

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Below: John Dobson giving some astronomy advice in the McDonald’s living room.

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