Astronomy:NGC 361
| NGC 361 | |
|---|---|
 NGC 361 with DECam Credit: Digitized Sky Survey | |
| Observation data (J2000 epoch) | |
| Constellation | Tucana |
| Right ascension | 01h 02m 10.1s[1] |
| Declination | −71° 36′ 17″[1] |
| Distance | 180000[1] |
| Apparent magnitude (V) | 12.24[2] |
| Apparent dimensions (V) | 2.6′ × 2.6′[3] |
| Physical characteristics | |
| Mass | 2.15×105[2] M☉ |
| Estimated age | 8.10±1.20 Gyr[2] |
| Other designations | ESO 051-SC 012.[1] |
NGC 361 is an open cluster in the Small Magellanic Cloud. It is located in the constellation Tucana. It was discovered on September 6, 1826, by James Dunlop. It was described by Dreyer as "very very faint, pretty large, very little extended, very gradually brighter middle."[4] At an aperture of 31.0 arcseconds, its apparent V-band magnitude is 12.24, but at this wavelength, it has 0.40 magnitudes of interstellar extinction.[2]
NGC 361 is about 8.1 billion years old. Its estimated mass is 2.15×105 M☉, and its total luminosity is 1.04×105 L☉, leading to a mass-to-luminosity ratio of 2.07 M☉/L☉.[2] All else equal, older star clusters have higher mass-to-luminosity ratios; that is, they have lower luminosities for the same mass.[2]
See also
References
- ↑ 1.0 1.1 1.2 1.3 "NASA/IPAC Extragalactic Database". Results for NGC 0361. http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+361&extend=no&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Song, Ying-Yi; Mateo, Mario; Bailey, John I.; Walker, Matthew G.; Roederer, Ian U.; Olszewski, Edward W.; Reiter, Megan; Kremin, Anthony (2021). "Dynamical masses and mass-to-light ratios of resolved massive star clusters – II. Results for 26 star clusters in the Magellanic Clouds". Monthly Notices of the Royal Astronomical Society 504 (3): 4160–4191. doi:10.1093/mnras/stab1065.
- ↑ "NGC 361". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+361.
- ↑ "New General Catalog Objects: NGC 350 - 399". Cseligman. http://cseligman.com/text/atlas/ngc3a.htm#361.
External links
- NGC 361 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- SEDS
Coordinates: 
01h 02m 10.1s, -71° 36′ 17″
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