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HD 125040

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HD 125040

Observation data
Epoch J2000 Equinox J2000

Constellation

Boötes

Right ascension

14^h16^m 32.84326^s^[1]

Declination

+20° 07′ 18.6591″^[1]

Apparent magnitude (V)

6.25^[2]

Characteristics

Spectral type

F8V^[3]

B−V color index

+0.488^[2]

Astrometry

Radial velocity (R_v)

−7.20±0.55^[4] km/s

Proper motion (μ)

RA: −135.85±0.57^[1] mas/yr
Dec.: −93.28±0.46^[1] mas/yr

Parallax (π)

30.65 ± 0.64 mas^[1]

Distance

106 ± 2 ly
(32.6 ± 0.7 pc)

Absolute magnitude (M_V)

3.69±0.05^[5]

Orbit^[6]

Period (P)

956.6±299.4 yr

Semi-major axis (a)

3.75±0.75"
(122.3±24.4 AU)

Eccentricity (e)

0.53±0.08

Inclination (i)

134.3±6.9°

Longitude of the node (Ω)

14.1±10.4°

Periastron epoch (T)

1683.9±14.2

Argument of periastron (ω)
(secondary)

72.2±18.5°

Details

Mass

1.23^[7] M_☉

Luminosity

2.57^[7] L_☉

Surface gravity (log g)

4.28^[7] cgs

Temperature

6,223^[5] K

Metallicity [Fe/H]

0.05^[5] dex

Rotational velocity (v sin i)

38.0^[7] km/s

Age

2.5+0.6
−0.7^[5] Gyr

Other designations

BD+20° 2954, HD 125040, HIP 69751, HR 5346, SAO 83259, WDS J14165+2007AB^[8]

Database references

SIMBAD

data

HD 125040 is a visual binary star system in the northern constellationofBoötes. It appears as a dim point of light near the lower limit of perception with the naked eye, having a combined apparent visual magnitude of 6.25.^[2] The system is located at a distance of approximately 106 light years from the Sun based on parallax measurements,^[1] but is drifting closer with a radial velocity of −7 km/s.^[4] It has a high proper motion, traversing the celestial sphere at an angular rateof0.164 arcseconds yr⁻¹.^[9]

This was first reported to be a double by J. F. W. Herschel in 1830. The stars orbit each other with a semi-major axisof122 AU, a period of roughly 956.6 years, and an eccentricity of 0.53. They have a combined mass about double that of the Sun.^[6] The primary component is an F-type main-sequence star with a stellar classification of F8V.^[3] The system is a source for X-ray emission.^[10]

References[edit]

^ ^a ^b ^c ^d ^e ^f 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, S2CID 18759600. Vizier catalog entry

^ ^a ^b ^c Häggkvist, L.; Oja, T. (1969), "Photoelectric BV photometry of 368 northern stars", Arkiv för Astronomi, 5: 125–135, Bibcode:1969ArA.....5..125H.

^ ^a ^b Harlan, E. A.; Taylor, D. C. (March 1970), "MK classification for F- and G-type stars. II", Astronomical Journal, 75 (2): 165–166, Bibcode:1970AJ.....75..165H, doi:10.1086/110956.

^ ^a ^b 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.

^ ^a ^b ^c ^d 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, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191, S2CID 118577511.

^ ^a ^b Kiyaeva, O. V.; et al. (May 2017), "New orbits of wide visual double stars", Astronomy Letters, 43 (5): 316–331, Bibcode:2017AstL...43..316K, doi:10.1134/S1063773717040041, S2CID 255196353.

^ ^a ^b ^c ^d Luck, R. Earle (January 2017), "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants", The Astronomical Journal, 153 (1): 19, arXiv:1611.02897, Bibcode:2017AJ....153...21L, doi:10.3847/1538-3881/153/1/21, S2CID 119511744, 21.

^ "HD 125040". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2014-10-02.

^ Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)", The Astronomical Journal, 129 (3): 1483–1522, arXiv:astro-ph/0412070, Bibcode:2005AJ....129.1483L, doi:10.1086/427854, S2CID 2603568.

^ Schwope, A.; et al. (2000), "The ROSAT Bright Survey: II. Catalogue of all high-galactic latitude RASS sources with PSPC countrate CR > 0.2 s⁻¹", Astronomische Nachrichten, 321 (1): 1–52, arXiv:astro-ph/0003039, Bibcode:2000AN....321....1S, doi:10.1002/(SICI)1521-3994(200003)321:1<1::AID-ASNA1>3.0.CO;2-C.