HD 125040
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes[1] |
| A | |
| Right ascension | 14h 16m 32.84325s[2] |
| Declination | +20° 07′ 18.6542″[2] |
| Apparent magnitude (V) | 6.41[3] |
| B | |
| Right ascension | 14h 16m 32.97162s[4] |
| Declination | +20° 07′ 14.6100″[4] |
| Apparent magnitude (V) | 8.33[5] |
| Characteristics | |
| Spectral type | F8V[6] |
| B−V color index | +0.488[7] |
| Astrometry | |
| Absolute magnitude (MV) | 3.68[1] |
| A | |
| Radial velocity (Rv) | −6.90±0.47[8] km/s |
| Proper motion (μ) | RA: −135.348[2] mas/yr Dec.: −95.322[2] mas/yr |
| Parallax (π) | 30.2106±0.0226 mas[2] |
| Distance | 107.96 ± 0.08 ly (33.10 ± 0.02 pc) |
| B | |
| Proper motion (μ) | RA: −125.557[4] mas/yr Dec.: −87.056[4] mas/yr |
| Parallax (π) | 30.2246 ± 0.0243 mas[4] |
| Distance | 107.91 ± 0.09 ly (33.09 ± 0.03 pc) |
| Orbit[9] | |
| 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 | |
| A | |
| Mass | 1.2[2] M☉ |
| Radius | 1.3[2] R☉ |
| Luminosity | 2.4[2] L☉ |
| Surface gravity (log g) | 4.22[2] cgs |
| Temperature | 6,326[2] K |
| Metallicity [Fe/H] | −0.31[2] dex |
| Rotational velocity (v sin i) | 35.9[10] km/s |
| Age | 2.5[2] Gyr |
| B | |
| Mass | 0.86[4] M☉ |
| Radius | 0.81[4] R☉ |
| Luminosity | 0.42[4] L☉ |
| Surface gravity (log g) | 4.53[4] cgs |
| Temperature | 5,260[4] K |
| Metallicity [Fe/H] | −0.17[4] dex |
| Age | 5.2[4] Gyr |
| Other designations | |
| BD+20°2954, HD 125040, HIP 69751, HR 5346, SAO 83259, WDS J14165+2007AB[11] | |
| Database references | |
| SIMBAD | data |
| A | |
| B | |
HD 125040 is a visual binary star system in the northern constellation of Boötes. 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.[7] The system is located at a distance of approximately 106 light years from the Sun based on parallax measurements,[12] but is drifting closer with a radial velocity of −7 km/s.[13] It has a high proper motion, traversing the celestial sphere at an angular rate of 0.164 arcseconds yr−1.[14]
This was first reported to be a double by J. F. W. Herschel in 1830. The stars orbit each other with a semi-major axis of 122 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.[9] The combined spectral type is of an F-type main-sequence star with a stellar classification of F8V;[6] the brighter primary star has a spectral class of F6V.[15] The system is a source for X-ray emission.[16]
References
[edit]- ^ a b Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
- ^ a b c d e f g h i j k l Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000), "The Tycho-2 catalogue of the 2.5 million brightest stars", Astronomy and Astrophysics, 355, Bibcode:2000A&A...355L..27H.
- ^ a b c d e f g h i j k l Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ Fabricius, C.; Høg, E.; Makarov, V. V.; Mason, B. D.; Wycoff, G. L.; Urban, S. E. (2002), "The Tycho double star catalogue", Astronomy and Astrophysics, 384: 180, Bibcode:2002A&A...384..180F, doi:10.1051/0004-6361:20011822.
- ^ 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 Häggkvist, L.; Oja, T. (1969), "Photoelectric BV photometry of 368 northern stars", Arkiv för Astronomi, 5: 125–135, Bibcode:1969ArA.....5..125H.
- ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ 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.
- ^ Valenti, Jeff A.; Fischer, Debra A. (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, Bibcode:2005ApJS..159..141V, doi:10.1086/430500.
- ^ "HD 125040". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2014-10-02.
- ^ 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
- ^ 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.
- ^ 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.
- ^ Abt, H. A. (1981), "Visual multiples. VII. MK classifications", The Astrophysical Journal Supplement Series, 45: 437, Bibcode:1981ApJS...45..437A, doi:10.1086/190719.
- ^ 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.
External links
[edit]- HR 5346, Bright Star Catalog entry at VizieR
- CCDM J14165+2007, Catalog of Components of Double and Multiple Stars entry at VizieR
- HD 125040 Aladin image
