107 Piscium

107 Piscium
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Pisces
Right ascension 01h 42m 29.76349s[1]
Declination +20° 16′ 06.6602″[1]
Apparent magnitude (V) 5.14 to 5.26[2]
Characteristics
Spectral type K1V[3]
U−B color index +0.49[4]
B−V color index +0.84[4]
V−R color index 0.5[5]
R−I color index +0.43[4]
Variable type Constant[6]
Astrometry
Radial velocity (Rv)−33.619±0.0013[7] km/s
Proper motion (μ) RA: −301.592[1] mas/yr
Dec.: −674.505[1] mas/yr
Parallax (π)131.4903 ± 0.1515 mas[1]
Distance24.80 ± 0.03 ly
(7.605 ± 0.009 pc)
Absolute magnitude (MV)5.87[8]
Details[9]
Mass0.86 M☉
Radius0.82±0.03 R☉
Luminosity (bolometric)0.46[8] L☉
Surface gravity (log g)4.57±0.10 cgs
Temperature5,172±80 K
Metallicity [Fe/H]−0.01±0.07 dex
Rotation35.0 days[10]
Rotational velocity (v sin i)2.0±1.0 km/s
Age6.3[11] Gyr
Other designations
107 Psc, BD+19°279, GC 2080, HD 10476, HIP 7981, HR 493, SAO 74883, PPM 91014, CCDM J01425+2016A, WDS 01425+2016A, LFT 153, LHS 1287, LTT 10596, NLTT 5685[5][12]
Database references
SIMBADdata

107 Piscium is a single[13] star in the constellation of Pisces. 107 Piscium is the star's Flamsteed designation. John Flamsteed numbered the stars of Pisces from 1 to 113, publishing his Catalogus Britannicus in 1725. He accidentally numbered 107 Piscium twice, as he also allocated it the designation of 2 Arietis.[14] This star is faintly visible to the naked eye with an apparent visual magnitude that has been measured varying between 5.14 and 5.26.[2] However, that finding of variation was not confirmed by subsequent observations and is most likely spurious data.[6] It is located at a distance of about 24.8 light years away from the Sun.[1] 107 Piscium is drifting closer to the Sun with a radial velocity of −33.6,[7] and is predicted to come as close as 15.4 light-years in around 135,800 years.[15]

This object is a K-type main-sequence star with a stellar classification of K1V,[3] indicating it is generating energy from core hydrogen fusion. It is somewhat older than the Sun—approximately 6 billion years old.[11] The star has 86% of the mass and 82% of the radius of the Sun,[9] but shines with only 46% of the Sun's luminosity.[8] The effective temperature of the star is 5,172 K.[9] It is rotating slowly with a period of 35.0 d.[10] The abundance of elements other than hydrogen and helium—the star's metallicity—is slightly lower than that of the Sun.[16] The level of chromospheric activity is similar to the Sun, and it shows a simple cycle of variation.[17][18]

107 Piscium has been examined for the presence of an infrared excess caused by exozodiacal dust, but none was detected.[19] The habitable zone for this star, defined as the locations where liquid water could be present on an Earth-like planet, is at a radius of 0.52–1.10 Astronomical Units (AU), where 1 AU is the average distance from the Earth to the Sun.[19]

In 1997, based on data collected during the Hipparcos mission, the star was categorized as an astrometric binary with a period of 0.576 years. However, this result has not been not confirmed.[20]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference nsv1 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Keenan1989 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference bsc2 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference sb0 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Lockwood1997 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Soubiran2018 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference takeda was invoked but never defined (see the help page).
  9. ^ a b c Cite error: The named reference Fuhrmann2011 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference aaa521_A12 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference MH08 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference wds was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Halbwachs2018 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference jha18_3_209 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Bailer2018 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference geneva3 was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference Radick2018 was invoked but never defined (see the help page).
  18. ^ Cite error: The named reference Wright2008 was invoked but never defined (see the help page).
  19. ^ a b Cite error: The named reference aaa555_A104 was invoked but never defined (see the help page).
  20. ^ Cite error: The named reference aaa574_A6 was invoked but never defined (see the help page).