NGC 1721

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Galaxy
NGC 1721
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Galaxy group in Eridanus (NGC 1721, NGC 1723, NGC 1725, and NGC 1728) .jpg
AladinLite
Constellation Eridanus
Position
equinoxJ2000.0 , epoch : J2000.0
Right ascension 04 h 59 m 17.4 s
declination -11 ° 07 ′ 07 ″
Appearance
Morphological type (R ') SAB (s) 0 ^ 0 ^ / pec  
Brightness  (visual) 12.8 mag
Brightness  (B-band) 13.8 mag
Angular expansion 1.9 ′ × 1 ′
Position angle 132 °
Surface brightness 13.4 mag / arcmin²
Physical data
Affiliation LGG 124  
Redshift 0.015010 ± 0.000030  
Radial velocity (4500 ± 9) km / s  
Stroke distance
v rad  / H 0
(196 ± 14)  ·  10 6  ly
(60.1 ± 4.2)  Mpc 
history
discovery Edward Emerson Barnard
Discovery date November 10, 1885
Catalog names
NGC  1721 • PGC  16484 • MCG  -02-13-027 • IRAS  04569-1111 • 2MASX  J04591738-1107071 • VV  699 NED01 • LDCE 354 NED008

NGC 1721 is a lenticular galaxy of the Hubble type S0 in the constellation Eridanus in the southern sky . It is estimated to be 196 million light-years from the Milky Way and about 110,000 light years in diameter.

In the same area of ​​the sky are u. a. the galaxies NGC 1723 , NGC 1725 , NGC 1728 .

The object was discovered on November 10, 1885 by Edward Emerson Barnard .

NGC 1721 group ( LGG 124 )

Galaxy Alternative name Distance / million ly
PGC 16324 MCG-02-13-021 198
NGC 1728 PGC 16495 163
NGC 1721 PGC 16484 196

Web links

Commons : NGC 1721  - Collection of Images

Individual evidence

  1. a b c d e f NASA / IPAC EXTRAGALACTIC DATABASE
  2. a b c d e SEDS : NGC 1721
  3. ^ VizieR
  4. Seligman