Spiral Galaxy NGC 3184 & Supernova 1999gi

These are two 8 minute exposures with an ST-6 CCD camera thru Kopernik's 20-inch F/8.1 Ritchey Chretien Cassegrain telescope. The field of view is about 5x7 arc minutes.

Supernova 1999gi:

Discovered: December 9th, 1999, by amateur astronomer Reiki Kushida of Japan. This is her 8th supernova discovery.

• Magnitude 14.5 at discovery
• Type II, near max brightness
• Magnitude 14.2 in our image (5:10 UT, April 1st, 2000)

Follow this Link to a NASA Web site on supernovas. It has a very nice animation and a description of what these objects are.

Spiral Galaxy NGC 3184:

Quote from the Deep Sky Field Guide to Uranometria 2000:

Small, very bright nucleus; two main knotty arms.

This grand face-on spiral galaxy is about one degree east of the 3rd magnitude star Mu Ursae Majoris. The bright star embedded in the outer parts is about 11th magnitude. Because of errors in the New General Catalog(NGC), this galaxy is also NGC 3180, and is probably the missing objects NGC 3181 and 3182.

• NGC 3184
• Magnitude: 10.5
• Constellation: Ursa Major
• RA: 10h 18m 17.2s
• Dec: +41d 25' 27" Epoch 2000
• Size (mins): 7.4 x 7.0
• Classification: SAB(rs)cd II-III
                          Mixed Barred - Nonbarred Spiral, mixed S-shaped - Inner Ring, Luminosity class II-III
  
  

Click below to

George Normandin, KAS

May 3rd, 1998,
revised April 4th, 2000