41 G. Arae
Observation data Epoch J2000 Equinox J2000 | ||
---|---|---|
Constellation | Ara | |
Right ascension | 17h 19m 03.83755s[1] | |
Declination | −46° 38′ 10.4404″[1] | |
Apparent magnitude (V) | 5.48[2] (5.61 / 8.88)[3] | |
Characteristics | ||
Spectral type | G8V + M0V[4] | |
U−B color index | +0.38[5] | |
B−V color index | +0.80[6] | |
R−I color index | +0.41[6] | |
Absolute magnitude (MV) | 5.74[7] | |
Argument of periastron (ω)(secondary) | 329.7° | |
Details | ||
41 G. Ara A | ||
Gyr | ||
41 G. Ara B | ||
Mass | 0.52[4] M☉ | |
Radius | 0.650[4] R☉ | |
LTT 6886, SAO 227816, LPM 636, LFT 1334. | ||
Database references | ||
SIMBAD | 41 G. Ara | |
41 G. Ara A | ||
41 G. Ara B | ||
ARICNS | 41 G. Ara A | |
41 G. Ara B |
41 G. Arae (abbreviated to 41 G. Ara), also known as GJ 666, is a trinary star system in the constellation Ara 28.7 light-years (8.8 parsecs) from the Sun. Although often called just 41 Arae, it is more accurate to call it 41 G. Arae, as the number 41 is the Gould designation (Flamsteed only covered the northern hemisphere).
The primary star in this system is a
The two stars share a highly elliptical orbit that takes several centuries to complete. The estimates of the period range from 693 to 2,200 years,[12] and the average separation of the two stars is about 210 AU (or 210 times the average distance between the Earth and the Sun).
41 G. Arae is most likely a triple, comprising the following components: Gliese 666A supposed as a spectroscopic binary, and Gliese 666B as its companion. Two other visual companions were proposed, but neither share the system's motion.[13] Observations from Gaia have shown that it is in fact component B which is binary, with an orbital period of 88 days.[14]
This system has a relatively high proper motion, moving over a second of arc across the sky each year. The
See also
References
- ^ S2CID 244398875. Gaia DR3 record for this source at VizieR.
- Bibcode:2002yCat.2237....0D.
- ^ a b "Entry 171903.85-463810.1", Sixth Catalog of Orbits of Visual Binary Stars, United States Naval Observatory, archived from the original on 2017-08-01, retrieved 2016-06-07.
- ^ Bibcode:1979VKha..190...52Z.
- Bibcode:1966CoLPL...4...99J.
- ^ Bibcode:1988A&A...191..237P
- S2CID 118577511.
- ^ S2CID 18775378
- ]
- S2CID 27151456
- S2CID 16256304
- S2CID 119459291
- .
- .
External links
- 41 G. Arae 2 SolStation entry.
- HR 6416
- Image 41 G Arae
- HIC 84720
- CCDM 17191-4638