38 Aquarii
From Infogalactic: the planetary knowledge core
 Location of 38 Aquarii (circled) |
|
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) |
|
|---|---|
| Constellation | Aquarius |
| Right ascension | 22h 10m 37.48206s[1] |
| Declination | –11° 33′ 53.7754″[1] |
| Apparent magnitude (V) | +5.43[2] |
| Characteristics | |
| Spectral type | B5 III[3] |
| B−V color index | –0.12[4] |
| Astrometry | |
| Radial velocity (Rv) | +1.5[2] km/s |
| Proper motion (μ) | RA: +29.29[1] mas/yr Dec.: +8.76[1] mas/yr |
| Parallax (π) | 7.25 ± 0.33[1] mas |
| Distance | 450 ± 20 ly (138 ± 6 pc) |
| Details | |
| Radius | 5.6[5] R☉ |
| Surface gravity (log g) | 4.00[3] cgs |
| Temperature | 13,860[3] K |
| Metallicity [Fe/H] | –0.26[3] dex |
| Rotational velocity (v sin i) | 20[6] km/s |
| Other designations | |
38 Aquarii (abbreviated 38 Aqr) is a star in the equatorial constellation of Aquarius. 38 Aquarii is its Flamsteed designation though it also bears the Bayer designation of e Aquarii. It is a faint star but visible to the naked eye, with an apparent visual magnitude of +5.43.[2] The distance to this star, based upon parallax measurements, is around 450 light-years (140 parsecs).[1]
The spectrum of 38 Aquarii matches a stellar classification of B5 III.[3] A luminosity class of III indicates that this is an evolved giant star. It has 5.6[5] times the radius of the Sun and is spinning with a projected rotational velocity of 20 km/s.[6] The outer atmosphere of the star has a blue-white glow from an effective temperature of 13,860 K.[3]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 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 3.4 3.5 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 6.0 6.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
