106 Aquarii
| Observation data Epoch J2000.0 (ICRS) Equinox J2000.0 (ICRS) |
|
|---|---|
| Constellation | Aquarius |
| Right ascension | 23h 44m 12.07893s[2] |
| Declination | –18° 16′ 36.9688″[2] |
| Apparent magnitude (V) | +5.244[3] |
| Characteristics | |
| Spectral type | B9 V[4] |
| U−B color index | –0.239[3] |
| B−V color index | –0.086[3] |
| Astrometry | |
| Radial velocity (Rv) | +14.0[5] km/s |
| Proper motion (μ) | RA: +27.23[2] mas/yr Dec.: –2.94[2] mas/yr |
| Parallax (π) | 8.61 ± 0.54[2] mas |
| Distance | 380 ± 20 ly (116 ± 7 pc) |
| Details | |
| Radius | 2.7–3.2[6] R☉ |
| Rotational velocity (v sin i) | 370[7] km/s |
| Other designations | |
106 Aquarii (abbreviated 106 Aqr) is a star in the equatorial constellation of Aquarius. 106 Aquarii is the Flamsteed designation although it also bears the Bayer designation i1 Aquarii. It has an apparent visual magnitude of +5.2,[3] making it bright enough to be viewed from the suburbs according to the Bortle Dark-Sky Scale. An annual parallax shift of 8.61[2] milliarcseconds yields an estimated distance of around 380 light-years (120 parsecs) from Earth.
The spectrum of this star fits a stellar classification of B9 V,[4] indicating this is a B-type main sequence star. It is spinning rapidly with a projected rotational velocity of 370 km/s.[7] X-ray emission with a luminosity of 6.0 × 1029 erg s−1 has been detected from this star. This is unusual since a B-type star normally does not have any significant X-ray emission. Instead, it may have an undetected lower mass companion.[9]
References
- ↑ Of the grouping of four stars within the circle, 106 Aquarii is the second from the left per:
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