40 Arietis
From Infogalactic: the planetary knowledge core
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Aries |
| Right ascension | 02h 48m 32.08886s[1] |
| Declination | +18° 17′ 01.6489″[1] |
| Apparent magnitude (V) | 5.82[2] |
| Characteristics | |
| Spectral type | K1 III[3] |
| U−B color index | 1.13 |
| B−V color index | +1.20[2] |
| R−I color index | 0.44 |
| Astrometry | |
| Radial velocity (Rv) | +47.1[4] km/s |
| Proper motion (μ) | RA: +42.00[1] mas/yr Dec.: -32.35[1] mas/yr |
| Parallax (π) | 7.06 ± 0.47[1] mas |
| Distance | 460 ± 30 ly (142 ± 9 pc) |
| Other designations | |
40 Arietis (abbreviated 40 Ari) is a binary star[3] system in the northern constellation of Aries. 40 Arietis is the Flamsteed designation. Their combined apparent magnitude is 5.82,[2] putting the system near the limit of naked eye visibility. Based upon an annual parallax shift of just 7.06 mas,[1] it is 460 light-years (140 parsecs) away from the Sun, give or take a 30 light-year margin of error. At that distance, its brightness is diminished by 0.21 in magnitude from extinction caused by interstellar gas and dust.[6]
This is a spectroscopic binary with an angular separation of 0.2 arcseconds between the two components.[3] Their merged spectrum matches that of an evolved giant star with a stellar classification of K1 III.[3]
References
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- ↑ 2.0 2.1 2.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 3.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
