GJ 1061
Red dwarf star in the constellation Horologium / From Wikipedia, the free encyclopedia
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GJ 1061 is a red dwarf star located 12 light-years (3.7 parsecs) from Earth in the southern constellation of Horologium. Even though it is a relatively nearby star, it has an apparent visual magnitude of about 13,[2] so it can only be seen with at least a moderately-sized telescope.
Location of GJ 1061 in the constellation Horologium | |
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Horologium |
Right ascension | 03h 35m 59.69916s[1] |
Declination | −44° 30′ 45.7308″[1] |
Apparent magnitude (V) | 13.03[2] |
Characteristics | |
Spectral type | M5.5 V[2] |
Apparent magnitude (J) | 7.52 ± 0.02[3] |
U−B color index | 1.52[3] |
B−V color index | 1.90[3] |
Astrometry | |
Radial velocity (Rv) | 1.49±0.23[1] km/s |
Proper motion (μ) | RA: 745.654 mas/yr[1] Dec.: −373.323 mas/yr[1] |
Parallax (π) | 272.1615 ± 0.0316 mas[1] |
Distance | 11.984 ± 0.001 ly (3.6743 ± 0.0004 pc) |
Absolute magnitude (MV) | 15.26[4] |
Details | |
Mass | 0.125±0.003[5] M☉ |
Radius | 0.152±0.007[5] R☉ |
Luminosity (bolometric) | 0.001641±0.000037[5] L☉ |
Luminosity (visual, LV) | 0.00007[nb 1] L☉ |
Temperature | 2,977+72 −69[5] K |
Metallicity [Fe/H] | −0.03±0.09[5] dex |
Rotational velocity (v sin i) | ≤ 5[6] km/s |
Age | >7.0±0.5[7] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
The proper motion of GJ 1061 has been known since 1974, but it was estimated to be further away: approximately 25 light-years (7.7 parsecs) distant based upon an estimated parallax of 0.130″. The RECONS accurately determined its distance in 1997. At that time, it was the 20th-nearest star system to the Sun. The discovery team noted that many more stars like this are likely to be discovered nearby.[2]
This star is a tiny, dim, red dwarf, close to the lower mass limit. It has an estimated mass of about 12.5% that of the Sun and is only about 0.2% as luminous.[5] The star displays no significant infrared excess due to circumstellar dust.[8]