NGC 89 (other designations - ESO 194-11 , SGC 001855-4855.1 , PGC 1374 ) - a dim galaxy of the southern hemisphere of the sky, located in the constellation Phoenix ; Together with NGC 87 , NGC 88 and NGC 92, it is part of the Robert Quartet , a compact group of interacting galaxies.
| NGC 89 | |
|---|---|
| Galaxy | |
 Robert Quartet. NGC 89 below. | |
| Research history | |
| Discoverer | John Herschel |
| opening date | September 30, 1834 |
| Designations | NGC 89 , ESO 194-11 , SGC 001855-4855.1 , PGC 1374 |
| Observational data ( Age J2000.0 ) | |
| Constellation | Phoenix |
| Right ascension | |
| Declination | |
| Visible dimensions | 1.2 ′ × 0.6 ′ |
| Apparent magnitude m V | 13.3 |
| Photographic magnitude m B | 14.2 |
| Specifications | |
| Type of | SB0-a |
| Distance | 160 million St. years old |
| Angular position | 148 ° |
| Surface brightness | 12.8 |
This object is one of those listed in the original edition of the New General Catalog .
NGC 89 is located at a distance of 160 million St. years to and belongs to the class of spiral galaxies . It has a perinuclear ring from which two symmetrical spiral arms emanate. [1] The semi-stellar blue core of the galaxy is a Seyfert second type. From the galaxy, a jet (emission) of ionized hydrogen (HII) emits towards NGC 92 (in the photo at the top left), visible in the H α lines. Characterized by a low HI content relative to other members of the group; the mass of molecular hydrogen (H 2 ) is significant - about 10 8.6 solar masses . [2]
See also
- List of Messier objects
- New shared directory
Links
- Information in English and French from the original “ New General Catalog ”
- Information (Eng.) From the Revised New General Catalog
- SIMBAD
- VizieR (English)
- NASA / IPAC Extragalactic Database
- List of NGC 89 publications
Notes
- ↑ Borchkhadze, TM Sixteen southern interacting galaxy systems with emission lines // Astronomy and Astrophysics Supplement Series. - 1977.- T. 30 . - S. 35-43 .
- ↑ E. Pompei and others. Optical and radio survey of southern compact groups of galaxies. I. Pilot study of six groups // Astronomy and Astrophysics. - 2007.- T. 473 , no. 2 . - S. 399-409 . - DOI : 10.1051 / 0004-6361: 20077140 .