30 Arietis
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Aries |
| 30 Arietis A | |
| Right ascension | 02h 37m 00.52s[1] |
| Declination | +24° 38′ 50.0″[1] |
| Apparent magnitude (V) | 6.48 |
| 30 Arietis B | |
| Right ascension | 02h 36m 57.74s[1] |
| Declination | +24° 38′ 53.0″[1] |
| Apparent magnitude (V) | 7.09 |
| Astrometry | |
| 30 Arietis A | |
| Radial velocity (Rv) | 14.9 km/s |
| Proper motion (μ) | RA: 136.96 ± 0.60[1] mas/yr Dec.: –14.69 ± 0.43[1] mas/yr |
| Parallax (π) | 23.95 ± 0.59[1] mas |
| Distance | 136 ± 3 ly (42 ± 1 pc) |
| Absolute magnitude (MV) | 3.46 |
| 30 Arietis B | |
| Radial velocity (Rv) | 17.2 km/s |
| Proper motion (μ) | RA: 150.75 ± 0.75[1] mas/yr Dec.: –12.79 ± 0.54[1] mas/yr |
| Parallax (π) | 24.52 ± 0.68[1] mas |
| Distance | 133 ± 4 ly (41 ± 1 pc) |
| Absolute magnitude (MV) | 4.11 |
| Characteristics | |
| Spectral type | F5 V / F6 V[2] |
| U−B color index | 0.02 |
| B−V color index | 0.410 / 0.510[2] |
| Details | |
| 30 Arietis A | |
| Mass | 1.31 ± 0.04[2] M☉ |
| Radius | 1.37 ± 0.03[2] R☉ |
| Luminosity | 3.6 L☉ |
| Temperature | 6300 ± 100 K |
| Age | (0.91 ± 0.03) × 109 years |
| 30 Arietis B | |
| Mass | 1.16 ± 0.04[2] M☉ |
| Radius | 1.13 ± 0.03[2] R☉ |
| Luminosity | 1.964 L☉ |
| Temperature | 6424 ± 180 K |
| Metallicity | 0.07 ± 0.2 |
| Age | (0.91 ± 0.03) × 109 years |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia |
data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
|
30 Arietis (abbreviated 30 Ari) is a 6th-apparent-magnitude quadruple star[3] in the constellation of Aries. 30 Arietis is the Flamsteed designation. 30 Arietis A and B are separated by 38.1" or about 1500 AU at a distance of 130 light years away. The main components of both systems are F-type main-sequence stars, meaning they are fusing hydrogen in their cores.[2] 30 Arietis A is itself a spectroscopic binary with an orbital period of 1.1 days.[4] The 30 Arietis system is 910 million years old, one fifth the age of the Sun.
Planetary system
On November 27, 2009, the discovery of a very massive planet was announced to be orbiting 30 Arietis B at a distance of about 1 AU.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥9.88 ± 0.94 MJ | 0.995 ± 0.012 | 335.1 ± 2.5 | 0.289 ± 0.092 | — | — |
See also
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 Lua error in package.lua at line 80: module 'strict' not found. Vizier catalog entry for A Vizier catalog entry for B
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 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.
External links
Coordinates: 
02h 36m 00.5237s, +24° 38′ 50.000″
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