Iota Persei

ι Persei


Location of ι Persei (circled)

Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 03h 09m 04.02s[1]
Declination +49° 36′ 47.8″[1]
Apparent magnitude (V) 4.062[2]
Characteristics
Spectral type F9.5 V[3]
U−B color index +0.119[2]
B−V color index +0.595[2]
Astrometry
Radial velocity (Rv)+50.0 km/s
Proper motion (μ) RA: +1262.41[1] mas/yr
Dec.: –91.50[1] mas/yr
Parallax (π)94.87 ± 0.23[1] mas
Distance34.38 ± 0.08 ly
(10.54 ± 0.03 pc)
Absolute magnitude (MV)3.94[4]
Details
Mass1.35±0.08[5] M☉
Radius1.412±0.009[6] R☉
Luminosity2.181±0.032[6] L☉
Surface gravity (log g)4.31[5] cgs
Temperature5,963±5.1[7] K
Metallicity [Fe/H]+0.09[8] dex
Rotational velocity (v sin i)4.1[5] km/s
Age3.2–4.1[5][8] Gyr
Other designations
ι Persei, ι Per, Iota Per, BD+49°857, CCDM J03091+4936A, FK5 112, GC 3740, HD 19373, HIP 14632, HR 937, IDS 03018+4914 A, PPM 45875, SAO 38597, WDS J03091+4937A
Database references
SIMBADdata

Iota Persei (Iota Per, ι Persei, ι Per) is a main sequence dwarf star in the constellation Perseus. It is somewhat larger and greater in mass than the Sun, and is located about 34 light years distant. Iota Persei has a relatively high proper motion across the sky, and moves at a net velocity of 92 km/s, relative to the Sun.

No sub-stellar companions to this star have yet been found. There is a 12th-magnitude line-of-sight companion star that is not believed to be gravitationally associated with Iota Persei.

Naming

In Chinese, 大陵 (Dà Líng), meaning Mausoleum, refers to an asterism consisting of ι Persei, 9 Persei, τ Persei, κ Persei, β Persei, ρ Persei, 16 Persei and 12 Persei. Consequently, ι Persei itself is known as 大陵三 (Dà Líng sān, English: the Third Star of Mausoleum.).[9]

See also

iota Persei in fiction

References

  1. 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. Bibcode:2007A&A...474..653V. arXiv:0708.1752 Freely accessible. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. 1 2 3 Jennens, P. A.; Helfer, H. L. (September 1975), "A new photometric metal abundance and luminosity calibration for field G and K giants", Monthly Notices of the Royal Astronomical Society, 172: 667–679, Bibcode:1975MNRAS.172..667J, doi:10.1093/mnras/172.3.667.
  3. ↑ Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal, 132 (1): 161–170, Bibcode:2006AJ....132..161G, arXiv:astro-ph/0603770 Freely accessible, doi:10.1086/504637.
  4. ↑ Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, Bibcode:2009A&A...501..941H, arXiv:0811.3982 Freely accessible, doi:10.1051/0004-6361/200811191.
  5. 1 2 3 4 Valenti, Jeff A.; Fischer, Debra A. (July 2005). "Spectroscopic Properties of Cool Stars (SPOCS). I. 1040 F, G, and K Dwarfs from Keck, Lick, and AAT Planet Search Programs". The Astrophysical Journal Supplement Series. 159 (1): 141–166. Bibcode:2005ApJS..159..141V. doi:10.1086/430500. Note: see VizieR catalogie J/ApJS/159/141.
  6. 1 2 Boyajian, Tabetha S.; et al. (February 2012), "Stellar Diameters and Temperatures. I. Main-sequence A, F, and G Stars", The Astrophysical Journal, 746 (1): 101, Bibcode:2012ApJ...746..101B, arXiv:1112.3316 Freely accessible, doi:10.1088/0004-637X/746/1/101. See Table 10.
  7. ↑ Kovtyukh, V. V.; et al. (2003). "High precision effective temperatures for 181 F-K dwarfs from line-depth ratios". Astronomy and Astrophysics. 411 (3): 559–564. Bibcode:2003A&A...411..559K. arXiv:astro-ph/0308429 Freely accessible. doi:10.1051/0004-6361:20031378.
  8. 1 2 Mamajek, Eric E.; Hillenbrand, Lynne A. (November 2008). "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics". The Astrophysical Journal. 687 (2): 1264–1293. Bibcode:2008ApJ...687.1264M. arXiv:0807.1686 Freely accessible. doi:10.1086/591785.
  9. ↑ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 11 日
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