101 Piscium

101 Piscium
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Pisces
Right ascension 01h 35m 46.44226s[1]
Declination +14° 39′ 41.1144″[1]
Apparent magnitude (V) 6.23[2]
Characteristics
Spectral type B9.5 III[3]
U−B color index −0.151[4]
B−V color index −0.036±0.005[2]
Astrometry
Radial velocity (Rv)−10.10[5] km/s
Proper motion (μ) RA: +3.287[1] mas/yr
Dec.: −8.052[1] mas/yr
Parallax (π)2.3343 ± 0.0663 mas[1]
Distance1,400 ± 40 ly
(430 ± 10 pc)
Absolute magnitude (MV)−2.07[2]
Details
Mass4.53±0.51[6] M☉
Radius3.6[7] R☉
Luminosity1,037+523
−347[6] L☉
Surface gravity (log g)2.907±0.028[8] cgs
Temperature10,471+49
−48[6] K
Rotational velocity (v sin i)246[6] km/s
Other designations
101 Psc, NSV 559, BD+13° 240, GC 1929, HD 9766, HIP 7436, HR 455, SAO 92530[9]
Database references
SIMBADdata

101 Piscium is a star in the zodiac constellation of Pisces,[9] located around 1,400 light years away from the Sun. This appears as a dim, blue-white hued star near the lower limit of visibility to the naked eye at an apparent visual magnitude of 6.23.[2] It is a suspected variable star with the designation NSV 559;[10] 101 Piscium is the Flamsteed designation. The star is moving closer to the Earth with a heliocentric radial velocity of −10 km/s.[5]

This object has a stellar classification of B9.5 III,[3] matching a giant star that has consumed the hydrogen at its core and is evolving away from the main sequence.[6] It is spinning rapidly with a projected rotational velocity of 246[6] km/s, compared to a critical velocity of 270 km/s.[8] The star has 4.5[6] times the mass of the Sun and about 3.6[7] times the Sun's radius. It is radiating around 1,000[6] times the luminosity of the Sun from its photosphere at an effective temperature of 10,471 K.[6]

  1. ^ a b c d e Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Cowley1969 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference UBV was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference RV was invoked but never defined (see the help page).
  6. ^ a b c d e f g h i Cite error: The named reference zorec2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference PasinettiFracassini2001 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Huang2010 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Simbad was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Samus2017 was invoked but never defined (see the help page).