Archive for November 23, 2021

NGC 16; Galaxy in Pegasus: December 2021 Observer’s Challenge Report #155

November 23, 2021

Work-File: Used only for organization and editing. When all entries are received, a .pdf report will be issued by the 10th of January. And the link will be posted on this page.

James Dire: Observer from Illinois

Supporting notes and information to follow later…

Pencil sketch by Roger Ivester: 10-inch reflector @114x

Supporting notes and information to follow later…

Mario Motta: Observer from Massachusetts

See attached images for December observer’s challenge object. Small NGC 16 galaxy is centered, but I wanted to get the general field which was too large for my 32-inch reflector field-of-view, so I combined two sets of images into a mosaic, and labeled them.

To the right (west) is NGC 1 and NGC 2, then moving east is NGC 16 (the December object) and finally toward the left (East) and on the the extreme edge is NGC 22.  Taken with my 32- inch telescope in two sets, then combined. It was not the best night, but being November 3, and having had to be away the past few weeks, I thought it best to use and send in.

Uwe Glahn: Observer from Germany

NGC 1 and NGC 2: 27-inch reflector @ 293x

Glenn Chaple: Observer from Massachusetts

NGC 16 – Lenticular Galaxy in Pegasus  (Magnitude 12.0, Size 1.8’ by 1.0’)

Our December Observer’s Challenge takes us to the northeast corner of Pegasus and a lenticular galaxy some 123 million light years away (SIMBAD data). Discovered by William Herschel on September 8, 1784. its appearance (“A faint star with small chevelure [hazy luminescence] and 2 burs”) led Sir William to enter it into his Catalogue of Nebulae and Clusters of Stars as a Class IV (Planetary Nebulae) object.

With a visual magnitude of 12.0, NGC 16 will challenge medium aperture scopes, especially if observed from an area beset by slight to moderate light pollution. I looked for it with a 10-inch f/5 reflecting telescope on an evening when the magnitude limit was around 5. At 140X, I was able to make out little more than a faint star (the galaxy’s nucleus). Visual observers in dark-sky locations or working with larger instruments may be able to make out a surrounding oval haze.

The 2000.0 celestial coordinates for NGC 16 are: RA 00h 09m 04.3s, DEC +27° 43’ 45”, a little over a degree south of the 2nd magnitude star Alpheratx (alpha [α] Andromedae). The accompanying finder chart should enable star-hoppers to find their way from Alpheratz to NGC 16.

Larry McHenry: Observer from Pittsburgh, PA.

December:  NGC 16 – Galaxy – Pegasus; Mag. V = 12.0;  sfc. br. 12.5;  Size 1.8′ x 1.0′

RA:  00h  09m   Dec.  +27º  44′  

NGC 16 (galaxy): Located in the fall constellation of Pegasus, ‘The Winged Horse’, is the small oval-shaped +12th mag lenticular (S0) galaxy NGC 16. The little galaxy displays a bright, bar-shaped central core embedded in the center of an inclined oval, which itself is surrounded by a light haze of unresolved starlight. Using the camera’s maximum FOV, I could also pull in the nearby faint spirals NGC 1 and 2, along with PGC619. NGC 16 was first observed on September 8th 1784 by William Herschel and is about 146 Mly distant and around 81,00 Ly in diameter.


11/05/2021: from Calhoun Cty Park, WV. Using an 8-inch SCT optical tube @ f6.3 on a GEM mount with a CMOS color camera and broadband filter @ 60-second guided exposure, livestacked for 15 minutes.