106 Aquarii

This article is about i1 Aquarii. For other star systems with this Bayer designation, see i Aquarii.
106 Aquarii
Location of 106 Aquarii (circled)[1]
Observation data
Epoch J2000.0 (ICRS)      Equinox J2000.0 (ICRS)
Constellation Aquarius
Right ascension 23h 44m 12.07852s[2]
Declination –18° 16′ 36.9999″[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[6] mas/yr
Dec.: –2.94[6] mas/yr
Parallax (π)8.7588 ± 0.2859 mas[2]
Distance370 ± 10 ly
(114 ± 4 pc)
Absolute magnitude (MV)−0.07[7]
Details
Mass3.0[8] M☉
Radius2.7–3.2[9] R☉
Luminosity151.88[7] L☉
Surface gravity (log g)3.791±0.011[8] cgs
Temperature11,555±50[8] K
Rotational velocity (v sin i)328±48[8] km/s
Other designations
i1 Aqr, BD−19°6500, FK5 1621, HD 222847, HIP 117089, HR 8998, SAO 165854[10]
Database references
SIMBADdata

106 Aquarii, abbreviated 106 Aqr, is a single[11] star in the equatorial constellation of Aquarius. 106 Aquarii is the Flamsteed designation, and 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[6] 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 328 km/s.[8] The star has 3[8] times the mass of the Sun and is radiating 152[7] times the Sun's luminosity from its photosphere at an effective temperature of 11,555 K.[8] 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.[12]

  1. ^ Cite error: The named reference sinnott_perryman1997 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference sps1966 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference houk1978 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference scfs was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference aaa474_2_653 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  8. ^ a b c d e f g Cite error: The named reference huang2010 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference aaa367_521 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference chini2012 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference aaa372_152 was invoked but never defined (see the help page).