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Arp Peculiar Object Number 80 - Spiral Galaxy With Large High Surface Brightness Companion
NGC 2633 ( PGC 24723 = Arp 80)
Discovered (Aug 11, 1882) by Wilhelm Tempel (VI-4, IX-6)
A 12th-magnitude spiral galaxy (type SB(s)b pec?) in Camelopardalis (RA 08 48 04.6, Dec +74 05 57)
Based on a recessional velocity of 2160 km/sec, NGC 2633 is about 100 million light years away, in good agreement with redshift-independent distance measurements of 90 to 110 million light years. Given that and its apparent size of 2.3 by 1.5 arcmin, it is about 65 thousand light years across. As in the case of Arp 79, NGC 2633's listing as Arp 80 is supposed to mean it is a spiral galaxy with a large high surface brightness companion, but there is no sign of such a companion on the corresponding Arp Atlas plate, and the assignment was presumably made merely on the basis of the increased brightness in the star-forming regions on the southern side of the galaxy.
"Excerpt courtesy of Courtney Seligman"
cseligman.com/text/atlas/ngc26.htm#2633
Image... Cherryvalley Observatory (I83). Telescope: 0.2-m SCT & SBIG STL-1301E CCD Camera @f7.6. Image Scale 2.17 arcsec/pixel, Field of View 46 x 37 arcmins. Combined Stack of four images of 212 seconds each unfiltered and unbinned. CCD operating temperature: -37 degrees. Image acquisition and processing: CCD Soft v5, TheSky6 Professional and Mira Pro v7. November 23rd 2014.
Dr. Halton Arp originally compiled the Atlas of peculiar galaxies with photographs he made mainly using the Palomar 200-inch telescope and the 48-inch Schmidt telescope between the years 1961 to 1966. Original image can be found here: ned.ipac.caltech.edu/level5/Arp/Figures/big_arp80.jpeg
Arp Peculiar Object Number 80 - Spiral Galaxy With Large High Surface Brightness Companion
NGC 2633 ( PGC 24723 = Arp 80)
Discovered (Aug 11, 1882) by Wilhelm Tempel (VI-4, IX-6)
A 12th-magnitude spiral galaxy (type SB(s)b pec?) in Camelopardalis (RA 08 48 04.6, Dec +74 05 57)
Based on a recessional velocity of 2160 km/sec, NGC 2633 is about 100 million light years away, in good agreement with redshift-independent distance measurements of 90 to 110 million light years. Given that and its apparent size of 2.3 by 1.5 arcmin, it is about 65 thousand light years across. As in the case of Arp 79, NGC 2633's listing as Arp 80 is supposed to mean it is a spiral galaxy with a large high surface brightness companion, but there is no sign of such a companion on the corresponding Arp Atlas plate, and the assignment was presumably made merely on the basis of the increased brightness in the star-forming regions on the southern side of the galaxy.
"Excerpt courtesy of Courtney Seligman"
cseligman.com/text/atlas/ngc26.htm#2633
Image... Cherryvalley Observatory (I83). Telescope: 0.2-m SCT & SBIG STL-1301E CCD Camera @f7.6. Image Scale 2.17 arcsec/pixel, Field of View 46 x 37 arcmins. Combined Stack of four images of 212 seconds each unfiltered and unbinned. CCD operating temperature: -37 degrees. Image acquisition and processing: CCD Soft v5, TheSky6 Professional and Mira Pro v7. November 23rd 2014.
Dr. Halton Arp originally compiled the Atlas of peculiar galaxies with photographs he made mainly using the Palomar 200-inch telescope and the 48-inch Schmidt telescope between the years 1961 to 1966. Original image can be found here: ned.ipac.caltech.edu/level5/Arp/Figures/big_arp80.jpeg