| NGC 1806 | |
|---|---|
 NGC 1806 image taken by theHubble Space Telescope | |
| Observation data (J2000epoch) | |
| Class | VI[1] |
| Constellation | Dorado |
| Right ascension | 05h 02m 11.180s[2] |
| Declination | −67° 59′ 05.89″[2] |
| Apparent magnitude (V) | 11.00[3] |
| Physical characteristics | |
| Mass | 7.6×104[3] M☉ |
| Estimated age | 1.60±0.05 Gyr[3] |
| Other designations | NGC 1806, KMHK 462, [SL63] 184 |
| See also:Globular cluster,List of globular clusters | |
NGC 1806 is aglobular cluster located within theLarge Magellanic Cloud within the constellation ofDorado (the dolphin-fish), an area of the sky best seen from the Earth's southern hemisphere. It was discovered in 1836 by the British astronomerJohn Herschel. At an aperture of 50 arcseconds, its apparent V-band magnitude is 11.00, but at this wavelength, it has 0.05 magnitudes ofinterstellar extinction.[3]
NGC 1806 is about 1.6 billion years old. Its estimated mass is7.6×104 M☉, and its total luminosity is1.42×105 L☉, leading to a mass-to-luminosity ratio of 0.54M☉/L☉.[3] All else equal, older star clusters have higher mass-to-luminosity ratios; that is, they have lower luminosities for the same mass.[3]
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