NGC 4123

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Galaxy
NGC 4123
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NGC 4123 [1] SDSS image
NGC 4123 SDSS image
AladinLite
Constellation Virgin
Position
equinox :  J2000.0 , epoch : J2000.0
Right ascension 12 h 08 m 11.111 s
declination + 02 ° 52 ′ 41.82 ″
Appearance
Morphological type SB (r) c / Sbrst / HII  
Brightness  (visual) 11.0 mag
Brightness  (B-band) 11.8 mag
Angular expansion 4.3 ′ × 3.2 ′
Position angle 135 °
Surface brightness 13.7 mag / arcmin²
Physical data
Affiliation NGC 4179 group
NGC 4123 group
LGG 275  
Redshift 0.004426 ± 0.000003  
Radial velocity 1327 ± 1 km / s  
Stroke distance
v rad  / H 0 		(55 ± 4)  ·  10 6  ly
(16.9 ± 1.2)  Mpc 
history
discovery William Herschel
Discovery date February 23, 1784
Catalog names
NGC  4123 • UGC  7116 • PGC  38531 • CGCG  041-042 • MCG  + 01-31-023 • IRAS  12056 + 0309 • 2MASX  J12081108 + 0252419 • GC  2733 • H  V 4 • h  1092 • HIPASS J1207 + 02 • KPG 322B • LDCE 870 NED002 • WISEA J120811.11 + 025242.0 • EVCC 107

NGC 4123 is an active bar-spiral galaxy of the Hubble-type SBb with a high rate of star formation in the constellation Virgo on the ecliptic . It is an estimated 55 million light years away from the Milky Way and is about 70,000 light years in diameter. Together with NGC 4116 , it forms the gravitationally bound galaxy pair KPG 322 and is the brightest member of the NGC 4123 group ( LGG 275 ).

The object was discovered on January 24, 1784 by Wilhelm Herschel using an 18.7 inch mirror telescope.

NGC 4123 group ( LGG 275 )

Galaxy Alternative name Distance / million ly
NGC 4116 PGC 38492 54
NGC 4123 PGC 38531 55
NGC 4179 PGC 38950 54
PGC 38117 UGC 7035 50
PGC 38793 UGC 7178 55
PGC 38822 UGC 7185 53
PGC 39474 UGC 7332 38

Web links

Commons : NGC 4123  - collection of images, videos, and audio files

Individual evidence

  1. ^ Aladin Lite
  2. ↑ a b c d e NASA / IPAC EXTRAGALACTIC DATABASE
  3. ↑ a b c d e f SEDS : NGC 4123
  4. ^ VizieR
  5. ↑ Seligman