109 Piscium

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109 Piscium
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Pisces
Right ascension 01h 44m 55.82s[1]
Declination +20° 04′ 59.3″[1]
Apparent magnitude (V) 6.292
Characteristics
Spectral type G5 IV
U−B color index 0.23
B−V color index 0.720
Variable type none
Astrometry
Proper motion (μ) RA: −44.75 ± 0.61[1] mas/yr
Dec.: −105.35 ± 0.37[1] mas/yr
Parallax (π) 30.70 ± 0.43[1] mas
Distance 106 ± 1 ly
(32.6 ± 0.5 pc)
Absolute magnitude (MV) 3.73[2]
Details
Mass 1.11 ± 0.03[3] M
Radius 1.69 ± 0.06[3] R
Luminosity 2.79[3] L
Temperature 5614 ± 80 K
Metallicity [Fe/H] +0.1 ± 0.06 dex
Rotation 32.6 ± 1.6 days[4]
Rotational velocity (v sin i) 1.3[2] km/s
Age 6.75 ± 0.71[3] Gyr
Other designations
HD 10697, HIP 8159, Gl 72, HR 508, BD+19°282

109 Piscium is a yellow subgiant located about 106 light years away in the constellation Pisces. It has a mass to that of the Sun, and has a higher abundance of iron.

Planetary system[edit]

The star rotates at an inclination of 69+21
−26
degrees relative to Earth.[4]

In 1999 an extrasolar planet was detected around this star.[5] It is probable that this planet shares that inclination.[6][7]

The 109 Piscium planetary system[8]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b >6.38 ± 0.53 MJ 2.16 ± 0.12 1076.4 ± 2.4 0.1023 ± 0.0096

Popular culture[edit]

In the 1983 Star Trek novel The Wounded Sky by Diane Duane, the USS Enterprise intentionally causes 109 Piscium to go supernova by entering warp drive too close to the star, in order to destroy a group of pursuing Klingon vessels. Captain Kirk experiences an uneasy sense that he may "get in trouble with Starfleet" over this arguably rash course of action.

See also[edit]

References[edit]

  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ a b Pizzolato, N.; Maggio, A.; Sciortino, S. (September 2000), "Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases", Astronomy and Astrophysics 361: 614–628, Bibcode:2000A&A...361..614P. 
  3. ^ a b c d Ghezzi, L. et al. (December 2010), "Metallicities of Planet-hosting Stars: A Sample of Giants and Subgiants", The Astrophysical Journal 725 (1): 721–733, arXiv:1008.3539, Bibcode:2010ApJ...725..721G, doi:10.1088/0004-637X/725/1/721. 
  4. ^ a b Simpson, E. K. et al. (November 2010), "Rotation periods of exoplanet host stars", Monthly Notices of the Royal Astronomical Society 408 (3): 1666–1679, arXiv:1006.4121, Bibcode:2010MNRAS.408.1666S, doi:10.1111/j.1365-2966.2010.17230.x.  as "HD 10697"
  5. ^ Vogt et al. (2000). "Six New Planets from the Keck Precision Velocity Survey". The Astrophysical Journal 536 (2): 902–914. arXiv:astro-ph/9911506. Bibcode:2000ApJ...536..902V. doi:10.1086/308981. Archived from the original on 2009-04-29. Retrieved 2009-04-09. 
  6. ^ "hd_10697_b". Extrasolar Planet Encyclopaedia. Retrieved November 12, 2012. 
  7. ^ Roberto Sanchis-Ojeda; Josh N. Winn; Daniel C. Fabrycky (2012). "Starspots and spin-orbit alignment for Kepler cool host stars". arXiv:1211.2002. Bibcode:2013AN....334..180S. doi:10.1002/asna.201211765. 
  8. ^ Butler, R. P. et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701. 

External links[edit]

Coordinates: Sky map 01h 44m 55s, +20° 04′ 59″