2MASS J17210390 + 3344160
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Brown dwarf 2MASS J17210390 + 3344160 |
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| Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Hercules | ||
| Right ascension | 17 h 21 m 3.9 s | ||
| declination | + 33 ° 44 ′ 16 ″ | ||
| Apparent brightness | J-band: approx. 14 mag | ||
| distance | ~ 70 ly (~ 20 pc ) |
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| Proper movement | |||
| Rec. Share: | -1836 mas / a | ||
| Dec. portion: | +561 mas / a | ||
| Typing | |||
| Spectral class | L3 | ||
| Physical Properties | |||
| Other names and catalog entries |
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2MASS J17210390 + 3344160 is an L3 dwarf in the constellation Hercules, about 70 light years away . Its proper movement is 1.95 arcsec / a. It was published in 2003 by Kelle L. Cruz et al. discovered.
Web links
- Entry at DwarfArchives.org (English)
- Cruz, Kelle L .; et al .: Meeting the Cool Neighbors. V. A 2MASS-Selected Sample of Ultracool Dwarfs . In: The Astronomical Journal, 2003, Volume 126, Number 5, pp. 2421-2448. bibcode : 2003AJ .... 126.2421C (English)