NGC 1846 - Misplaced Pages

Globular cluster in the constellation Dorado

NGC 1846
Picture from the Hubble Space Telescope
Observation data (J2000 epoch)
Constellation	Dorado
Right ascension	05 07 34.900
Declination	−67° 27′ 32.45″
Distance	160,000 ly (50000 pc)
Apparent magnitude (V)	10.68
Apparent dimensions (V)	3.8′
Physical characteristics
Mass	5.7×10 `M`_☉
Estimated age	1.70±0.05 Gyr
See also: Globular cluster, List of globular clusters

NGC 1846 is a globular cluster containing hundreds of thousands of stars in the outer halo of the Large Magellanic Cloud. It was discovered on November 6, 1826, by James Dunlop and is included in the New General Catalogue. At an aperture of 50 arcseconds, its apparent V-band magnitude is 10.68, but at this wavelength, it has 0.07 magnitudes of interstellar extinction.

NGC 1846 is about 1.7 billion years old. Its estimated mass is 5.7×10 M_☉, and its total luminosity is 1.68×10 L_☉, leading to a mass-to-luminosity ratio of 0.34 M_☉/L_☉. All else equal, older star clusters have higher mass-to-luminosity ratios; that is, they have lower luminosities for the same mass.

In an image taken by the Hubble Space Telescope in 2006 (see picture), astronomers spotted a green planetary nebula towards the bottom of the image. It is uncertain whether NGC 1846 contains this planetary nebula or if it just happened to be on the same line of sight; however, measurements of the motion of the cluster's stars along with the nebula's central star lead to the conclusion that it is a member of the cluster.

References

^ "NGC 1846". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-12.
^ 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. arXiv:2104.06882. doi:10.1093/mnras/stab1065.
^ "NASA - NASA's Hubble Finds Stellar Life and Death in a Globular Cluster". www.nasa.gov. Retrieved 2017-01-26.

External links

Media related to NGC 1846 at Wikimedia Commons

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Astronomical catalog List of NGC objects 1001–2000

New General Catalogue 1500 to 1999

Constellation of Dorado

Stars

Bayer	α β γ δ ε ζ η η θ κ λ ν π π G
Variable	R (P) S WZ AB BB
HR	1859 2102
HD	27274 28254 30177 33579 37836 37974 38282 269810 271182
Other	B90 BAT99-7 BAT99-66 BAT99-68 BAT99-98 BAT99-104 BAT99-123 BI 253 Gliese 163 HE 0437-5439 HV 888 IRAS 05280–6910 LHA 120-S 79 LH 41-1042 LH 54-425 LMC195-1 MACHO 80.7443.1718 Melnick 34 Melnick 42 PSR J0523−7125 PSR J0537−6910 PSR J0540−6919 R85 R99 R136 a a1 a2 a3 b c R139 R145 SGR 0525−66 TOI-700 TOI-813 VFTS 102 VFTS 243 VFTS 352 VFTS 682 WASP-62 (Naledi) WOH G64

Exoplanets	Gliese 163 c HD 28254 b HD 30177 b TOI-700 d e TOI-813 b TOI-4127 b

Star
clusters

NGC	1712 1712 1755 1761 1763 1783 1806 1818 1820 1846 1847 1850 1852 1854/1855 1856 1858 1859 1860 1866 1868 1869 1871 1872 1873 1898 1901 1903 1910 1929 1935 1955 1969 1971 1974 1978 1983 1984 1994 1997 2001 2002 2003 2004 2027 2040 2070 2074 2100 2108 2164 2197 2241 2257
Other	Hodge 301 LH 95

Nebulae

NGC	1934 1936 2014 2020 2029 2032 2060 2078 2080
Other	Henize 70 Honeycomb Nebula N119 N11 N41 N44 N49 N55 SNR 0509-67.5 Tarantula Nebula (30)

Galaxies

NGC	1533 1549 1553 1566 1672 1892 1947 2082
Other	Large Magellanic Cloud (partly in Mensa and Hydrus) LEDA 89996

Galaxy clusters	Dorado Group NGC 1566 Group

Astronomical events	GRB 790305b SN 1987A