HD 10307

HD 10307 A/B
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Andromeda
Right ascension 01h 41m 47.143s[1]
Declination +42° 36′ 48.12″[1]
Apparent magnitude (V) +4.95/+12.5
Characteristics
Spectral type G1.5 V + M V
U−B color index 0.11
B−V color index 0.62
Variable type None
Astrometry
Radial velocity (Rv)+3.1 km/s
Proper motion (μ) RA: 791.47 ± 0.48[1] mas/yr
Dec.: -180.80 ± 0.36[1] mas/yr
Parallax (π)78.50 ± 0.54[1] mas
Distance41.5 ± 0.3 ly
(12.74 ± 0.09 pc)
Absolute magnitude (MV)4.30/11.9
Details
HD 10307 A
Mass0.97[2] M☉
Radius1.20 R☉
Luminosity1.44 L☉
Surface gravity (log g)4.35 cgs
Temperature5,881 ± 4.0[3] K
Metallicity96% Sun
Age7.0 × 109[4] years
HD 10307 B
Mass0.29 M☉
Luminosity0.0013 L☉
Orbit
CompanionHR 483 B
Period (P)19.5 yr
Semi-major axis (a)0.58"
Eccentricity (e)0.43
Inclination (i)103°
Other designations
BD+41 328, GJ 67, HD 10307, HIP 7918, HR 483, LHS 1284, NStars 0141+4236, SAO 37434, YPC 350
Database references
SIMBADdata
ARICNSdata

HD 10307 (HR 483 A) is a star similar to the Sun in mass, temperature and metal content, situated about 41 light-years from Earth in the constellation Andromeda. Its companion, HR 483 B, is a little-studied red dwarf.

HD 10307 was identified in September 2003 by astrobiologist Margaret Turnbull from the University of Arizona in Tucson as one of the most promising nearby candidates for hosting life based on her analysis of the HabCat list of stars.

System

HR 483 is a binary located 41.2 ly away, in Andromeda. The two stars orbit one another elliptically (e=0.43), approaching as close as 4.2 AU and receding to 10.5 AU, with a period of just under twenty years. Due to the high margins of error on the mass estimates for the two stars, these orbital parameters are approximate.

HD 10307, the larger component, is a main sequence, yellow, sun-like star, only slightly brighter, hotter, larger, and older than the Sun - though with a slightly smaller mass. It has a low level of activity and is a candidate Maunder minimum analog.[2] HR 483 B, the smaller component, appears to be a red dwarf, with as little as thirty percent the mass of the sun.

Possibility of planets and life

The presence of a moderately close companion could disrupt the orbit of a hypothetical planet in HD 10307's habitable zone. However, the uncertainty of the orbital parameters makes it equally uncertain exactly where stable orbits would be in this system.

METI message to HD 10307

There was a METI message sent to HD 10307. It was transmitted from Eurasia's largest radar, 70-meter Eupatoria Planetary Radar. The message was named Cosmic Call 2, it was sent on July 6, 2003, and it will arrive at HD 10307 in September 2044.[5]

References

  1. 1 2 3 4 5 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. 1 2 Lubin, Dan; Tytler, David; Kirkman, David (March 2012), "Frequency of Maunder Minimum Events in Solar-type Stars Inferred from Activity and Metallicity Observations", The Astrophysical Journal Letters 747 (2): L32, Bibcode:2012ApJ...747L..32L, doi:10.1088/2041-8205/747/2/L32.
  3. ↑ Kovtyukh; et al. (2003). "High precision effective temperatures for 181 F-K dwarfs from line-depth ratios". Astronomy and Astrophysics 411 (3): 559–564. arXiv:astro-ph/0308429. Bibcode:2003A&A...411..559K. doi:10.1051/0004-6361:20031378.
  4. ↑ 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. arXiv:0807.1686. Bibcode:2008ApJ...687.1264M. doi:10.1086/591785.
  5. ↑ (Russian) http://www.cplire.ru/rus/ra&sr/VAK-2004.html

External links

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