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] |
Distance | 90.4 ± 0.1 ly (27.71 ± 0.04 pc) |
Absolute magnitude (MV) | +3.56[5] |
Details | |
Mass | 1.11[6] M☉ |
Radius | 1.67±0.04[7] R☉ |
Luminosity | 3.228+0.011 −0.010[1] L☉ |
Surface gravity (log g) | 4.03±0.03[8] cgs |
Temperature | 6,060±64[7] K |
Metallicity [Fe/H] | −0.20[9] dex |
Rotational velocity (v sin i) | 5±3[10] km/s |
Age | 6.6±0.5[11] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
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]