HD 11007

HD 11007
Location of HD 11007 on the map (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Triangulum
Right ascension 01h 48m 41.56269s[1]
Declination +32° 41′ 24.7521″[1]
Apparent magnitude (V) 5.81[2]
Characteristics
Spectral type F8 V[3]
U−B color index −0.03[2]
B−V color index +0.54[2]
Astrometry
Radial velocity (Rv)−24.4±0.3[4] km/s
Proper motion (μ) RA: −167.798 mas/yr[1]
Dec.: +296.869 mas/yr[1]
Parallax (π)36.0886 ± 0.0529 mas[1]
Distance90.4 ± 0.1 ly
(27.71 ± 0.04 pc)
Absolute magnitude (MV)+3.56[5]
Details
Mass1.11[6] M☉
Radius1.67±0.04[7] R☉
Luminosity3.228+0.011
−0.010[1] L☉
Surface gravity (log g)4.03±0.03[8] cgs
Temperature6,060±64[7] K
Metallicity [Fe/H]−0.20[9] dex
Rotational velocity (v sin i)5±3[10] km/s
Age6.6±0.5[11] Gyr
Other designations
AG+32°162, BD+31°316, FK5 2120, GC 2195, HD 11007, HIP 8433, HR 523, SAO 54994, LTT 10624, TIC 20931913[12]
Database references
SIMBADdata

HD 11007 (LTT 10624; HR 523) is a probable astrometric binary[13] located in the northern constellation Triangulum. The primary is faintly visible to the naked eye as a whitish-yellow-hued star with an apparent magnitude of 5.81.[2] The system is located relatively close at a distance of 90.4 light-years based on Gaia DR3 parallax measurements[1] and it is drifting closer with a heliocentric radial velocity of −24.4 km/s.[4] At its current distance, HD 11007's brightness is diminished by an interstellar extinction of 0.09 magnitudes[14] and it has an absolute magnitude of +3.56.[5] It is moving relatively fast across the celestial sphere,[15] having a high proper motion of 341 mas/yr.[1]

The primary has a stellar classification of F8 V,[3] indicating that it is an ordinary F-type main-sequence star that is generating energy via hydrogen fusion at its core. However, it is slightly evolved, being 1.62 magnitudes above the zero age main sequence.[16] It has 111% the mass of the Sun[6] and a slightly enlarged radius 1.67 times that of the Sun.[7] It is slightly over luminous for its class, radiating 3.23 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 6,060 K.[7] HD 11007 A is metal deficient with an iron abundance that is 63.1% solar[9] and it spins modestly with a somewhat constrained projected rotational velocity of approximately 5 km/s.[10] The system is estimated to be 6.6 billion years old; it was suspected to be part of the thick disk population[11] but is now considered to be one of the older members of the thin disk population.[17]

  1. ^ a b c d e f g h Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Imagawa1967 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Harlan1974 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Lambert2004 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference Masana2006 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Aguilera-Gómez2018 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Mishenia2019 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Balachandran1990 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Liu2000 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Ivanov2002 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Nordstrom2004 was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference Mishenia2004 was invoked but never defined (see the help page).