Astronomy:NGC 2090

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NGC 2090
A spiral galaxy with a wide, oval-shaped disc. It has a shining spot at thecentre which is surrounded by a whirl of dark threads and patches of dust, all atop a luminous disc. Some brighter lanes curving through the disc indicate the galaxy’s spiral arms. The glow of the disc fades smoothly into a dark background where faint, extended patches of stars can be seen, as well as some foreground stars.
NGC 2090 imaged by the Hubble Space Telescope in 2024
Observation data (J2000 epoch)
ConstellationColumba
Right ascension 05h 47m 01.8982s[1]
Declination−34° 15′ 00.806″[2]
Redshift0.003075[2]
Helio radial velocity922 ± 1 km/s[2]
Distance40.1 ± 2.9 Mly (12.3 ± 0.9 Mpc)[1]
Apparent magnitude (V)11.20[3]
Apparent magnitude (B)11.99[3]
Characteristics
TypeSA:(rs)c[3]
Size~111,200 ly (34.08 kpc) (estimated)[2]
Apparent size (V)4.9′ × 2.4′[3]
Other designations
ESO 363- G 023, IRAS 05452-3416, MCG-06-13-009, PGC 17819[4]

NGC 2090 is a spiral galaxy located in the constellation Columba. Its velocity with respect to the cosmic microwave background is 994 ± 5 km/s, which corresponds to a Hubble distance of 47.8 ± 3.4 Mly (14.65 ± 1.03 Mpc).[2] However, 51 non-redshift measurements give a distance of 42.46 ± 0.64 Mly (13.018 ± 0.197 Mpc).[5] It was discovered on 29 October 1826 by Scottish astronomer James Dunlop.[6] NGC 2090 was studied to refine the Hubble constant to an accuracy within ±10%.[1]

See also

References

  1. ↑ 1.0 1.1 1.2 Phelps, Randy L.; Sakai, Shoko; Freedman, Wendy L.; Madore, Barry F.; Saha, Abhijit; Stetson, Peter B.; Kennicutt, Robert C.; Mould, Jeremy R. et al. (1998). "The Hubble Space Telescope Extragalactic Distance Scale Key Project. IX. The Discovery of Cepheids in NGC 2090". The Astrophysical Journal 500 (2): 763–788. doi:10.1086/305766. Bibcode: 1998ApJ...500..763P. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 "Results for object NGC 2090". NASA and Caltech. http://ned.ipac.caltech.edu/byname?objname=NGC+2090. 
  3. ↑ 3.0 3.1 3.2 3.3 Gil de Paz, Armando et al. (December 2007). "The GALEX Ultraviolet Atlas of Nearby Galaxies". The Astrophysical Journal Supplement Series 173 (2): 185–255. doi:10.1086/516636. Bibcode: 2007ApJS..173..185G. 
  4. ↑ "NGC 2090". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+2090. 
  5. ↑ "Distance Results for NGC 2090". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+2090. 
  6. ↑ "New General Catalog Objects: NGC 2050 - 2099" (in en-US). http://cseligman.com/text/atlas/ngc20a.htm#2090. 

Coordinates: Sky map 05h 47m 01.8982s, −34° 15′ 00.806″



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