UScoCTIO 108
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Composite-color IZK image of UScoCTIO 108A and B (I=blue, Z=green, K'=red). IZ images are from the AUX camera on the William Herschel Telescope, and the image is from NICS on the Telescopio Nazionale Galileo | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Scorpius |
| Right ascension | 16h 05m 53.94s[1] |
| Declination | −18° 18′ 42.7″[1] |
| Characteristics | |
| Spectral type | M7[2] |
| Astrometry | |
| Distance | 473 ± 6 ly (145 ± 2[2] pc) |
| Details | |
| Mass | 0.06 ± 0.02 [2] M☉ |
| Luminosity | 0.01 [2] L☉ |
| Temperature | 2700 ± 100 [2] K |
| Database references | |
| SIMBAD | data |
| Position (relative to A) | |
|---|---|
| Epoch of observation | J2007.5 |
| Angular distance | 4.6 ± 0.1″ [2] |
| Position angle | 177 ± 1° [2] |
| Observed separation (projected) | ~670 AU [2] |
| Characteristics | |
| Spectral type | M9.5–L3[2] |
| Details | |
| Mass | 0.013+0.002−0.008 [2] M☉ |
| Luminosity | 0.0007 [2] L☉ |
| Temperature | 2350+100−400 [2] K |
| Other designations | |
UscoCTIO 108b[3] | |
| Database references | |
| SIMBAD | data |
UScoCTIO 108 is a binary system, approximately 470 light-years away in the Upper Scorpius (USco) OB association. The primary, UScoCTIO 108A, with mass around 0.06 solar masses, is a brown dwarf or low-mass red dwarf. The secondary, UScoCTIO 108B, with a mass around the deuterium burning limit of 13 Jupiter masses, would be classified as either a brown dwarf or an extrasolar planet.[2]
References
- ↑ 1.0 1.1 UScoCTIO 108, entry, SIMBAD. Accessed on line June 17, 2008.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 Discovery of a Wide Companion near the Deuterium-burning Mass Limit in the Upper Scorpius Association, V. J. S. Bejar, M. R. Zapatero Osorio, A. Perez-Garrido, C. Álvarez, E. L. Martin, R. Rebolo, I. Villó-Pérez, and A. Díaz-Sánchez, Astrophysical Journal 673, #2 (February 2008), pp. L185–L189. Bibcode: 2008ApJ...673L.185B doi:10.1086/527557.
- ↑ NAME UScoCTIO 108b, entry, SIMBAD. Accessed on line June 17, 2008.
External links
- Star: UScoCTIO 108, Extrasolar Planets Encyclopaedia. Accessed on line June 17, 2008.
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