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Arp Peculiar Object Number 42 - Spiral Galaxy with Low Surface Brightness Companion
NGC 5829 (PGC 53709 = HCG 73A, and with IC 4526 = Arp 42)
Discovered (May 11, 1882) by Édouard Stephan (12b-68)
A 13th-magnitude spiral galaxy (type SA(s)c) in Boötes (RA 15 02 42.0, Dec +23 20 00)
Historical Identification:
Physical Information: Based on a recessional velocity of 5635 km/sec, NGC 5829 is about 260 million light years away, in unusually poor agreement with redshift-independent distance estimates of 145 to 175 million light years. Using an intermediate distance of 200 million light years, the galaxy's apparent size of 1.45 by 1.0 arcmin would correspond to 110 thousand light years. NGC 5829 and IC 4526 make up Arp 42, an example of a spiral galaxy with a faint companion; but the two are not physical companions, as IC 4526 is over 300 million light years further away. The galaxy is also listed as a member of Hickson Compact Group 73, but is not actually a physical member of the group, being much closer than all the other members.
"Excerpt courtesy of Courtney Seligman"
cseligman.com/text/atlas/ngc58.htm#5829
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 three images of 120 seconds each unfiltered and unbinned. CCD operating temperature: -35 degrees. Image acquisition and processing: CCD Soft v5, TheSky6 Professional and Mira Pro v7. 18th February 2016
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_arp42.jpeg
Arp Peculiar Object Number 42 - Spiral Galaxy with Low Surface Brightness Companion
NGC 5829 (PGC 53709 = HCG 73A, and with IC 4526 = Arp 42)
Discovered (May 11, 1882) by Édouard Stephan (12b-68)
A 13th-magnitude spiral galaxy (type SA(s)c) in Boötes (RA 15 02 42.0, Dec +23 20 00)
Historical Identification:
Physical Information: Based on a recessional velocity of 5635 km/sec, NGC 5829 is about 260 million light years away, in unusually poor agreement with redshift-independent distance estimates of 145 to 175 million light years. Using an intermediate distance of 200 million light years, the galaxy's apparent size of 1.45 by 1.0 arcmin would correspond to 110 thousand light years. NGC 5829 and IC 4526 make up Arp 42, an example of a spiral galaxy with a faint companion; but the two are not physical companions, as IC 4526 is over 300 million light years further away. The galaxy is also listed as a member of Hickson Compact Group 73, but is not actually a physical member of the group, being much closer than all the other members.
"Excerpt courtesy of Courtney Seligman"
cseligman.com/text/atlas/ngc58.htm#5829
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 three images of 120 seconds each unfiltered and unbinned. CCD operating temperature: -35 degrees. Image acquisition and processing: CCD Soft v5, TheSky6 Professional and Mira Pro v7. 18th February 2016
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_arp42.jpeg