Astronomy:HD 10800
| Observation data Epoch J2000.0 Equinox (celestial coordinates) | |
|---|---|
| Constellation | Octans |
| Right ascension | 01h 37m 55.5567s[1] |
| Declination | −82° 58′ 29.9867″[1] |
| Apparent magnitude (V) | 5.87[2] |
| Characteristics | |
| Spectral type | G1 V[3] |
| U−B color index | +0.10[2] |
| B−V color index | +0.61[2] |
| Astrometry | |
| Radial velocity (Rv) | −1.1±0.4[4] km/s |
| Proper motion (μ) | RA: +122.526[1] mas/yr Dec.: +120.827[1] mas/yr |
| Parallax (π) | 37.0128 ± 0.229[1] mas |
| Distance | 88.1 ± 0.5 ly (27.0 ± 0.2 pc) |
| Absolute magnitude (MV) | +3.69[5] |
| Orbit[6] | |
| Primary | Aa |
| Companion | Ab |
| Period (P) | 19.371 d |
| Eccentricity (e) | 0.103±0.001 |
| Periastron epoch (T) | 2,456,938.6±0.02 JD |
| Argument of periapsis (ω) (primary) | 243±0.4° |
| Semi-amplitude (K1) (primary) | 36.45±0.04 km/s |
| Semi-amplitude (K2) (secondary) | 43.32±0.05 km/s |
| Orbit[6] | |
| Primary | A |
| Companion | B |
| Period (P) | 1.7486±0.0005 yr |
| Semi-major axis (a) | 7.823±0.047 mas |
| Eccentricity (e) | 0.191±0.002 |
| Inclination (i) | 47.6±0.5° |
| Periastron epoch (T) | 2,456,903.42±0.94 JD |
| Argument of periapsis (ω) (primary) | 151.2±0.3° |
| Semi-amplitude (K1) (primary) | 9.1±0.03 km/s |
| Semi-amplitude (K2) (secondary) | 17.9±0.05 km/s |
| Details | |
| Aa | |
| Mass | 1.09[7] M☉ |
| Radius | 1.1[8] R☉ |
| Luminosity | 1.82±0.04[9] L☉ |
| Surface gravity (log g) | 5[10] cgs |
| Temperature | 5,802[11] K |
| Metallicity [Fe/H] | −0.09±0.11[12] dex |
| Rotational velocity (v sin i) | 7[7] km/s |
| Age | 5.01±4.51[9] Gyr |
| Ab | |
| Mass | 0.64[13] M☉ |
| B | |
| Mass | 1±0.1[9] M☉ |
| Luminosity | 0.98+0.25−0.20[9] L☉ |
| Temperature | 5,741[7] K |
| Age | 4.79+1.24−0.98[9] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 10800, also known as HR 512 or Gliese 67.1, is a triple star located in the southern circumpolar constellation Octans. It has a combined apparent magnitude of 5.87,[2] allowing it to be faintly seen with the naked eye. The system is relatively close at a distance of 88.1 light years[1] but is drifting closer with a heliocentric radial velocity −1.1 km/s.[4]
The system has a blended spectral classification of G1 V,[3] indicating an ordinary G-type main-sequence star. The primary is a spectroscopic binary consisting of a G-type and K-type star circling around each other in 19 days.[6] HD 10800B has a class of G2 V,[9] the same spectral class as our own Sun. The AB pair take 1.7 years to orbit each other.[6]
HD 10800A
The primary (Aa) has 109% the mass of the Sun[7] and a radius 1.1 times that of the Sun.[8] It radiates at 1.82 times the luminosity of the Sun[9] from its photosphere at an effective temperature of 5,802 K,[11] giving a yellow hue. HD 10800A has a metallicity 81% that of the Sun, making it slightly metal deficient.[12] At an age of 5 billion years,[9] it spins with a projected rotational velocity of 7 km/s.[7] The close companion (Ab) has a mass 69% that of the Sun.[13]
HD 10800B
HD 10800B, the slightly distant companion, has the same mass of the Sun but is slightly cooler (37 K difference) and dimmer, with a luminosity 98% that of the Sun.[9] The object is only marginally older than the Sun at an age of 4.8 billion years.[9]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G. Gaia EDR3 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues 2237. Bibcode: 2002yCat.2237....0D.
- ↑ 3.0 3.1 Torres, C. A. O.; Quast, G. R.; da Silva, L.; de la Reza, R.; Melo, C. H. F.; Sterzik, M. (12 September 2006). "Search for associations containing young stars (SACY)". Astronomy & Astrophysics 460 (3): 695–708. doi:10.1051/0004-6361:20065602. ISSN 0004-6361. Bibcode: 2006A&A...460..695T.
- ↑ 4.0 4.1 Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. ISSN 1063-7737. Bibcode: 2006AstL...32..759G.
- ↑ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A.
- ↑ 6.0 6.1 6.2 6.3 Tokovinin, Andrei (20 June 2016). "Orbits of Four Young Triple-lined Multiple Systems". The Astronomical Journal 152 (1): 11. doi:10.3847/0004-6256/152/1/11. Bibcode: 2016AJ....152...11T.
- ↑ 7.0 7.1 7.2 7.3 7.4 Nordström, B.; Mayor, M.; Andersen, J.; Holmberg, J.; Pont, F.; Jørgensen, B. R.; Olsen, E. H.; Udry, S. et al. (May 2004). "The Geneva-Copenhagen survey of the Solar neighbourhood: Ages, metallicities, and kinematic properties of ~14 000 F and G dwarfs". Astronomy & Astrophysics 418 (3): 989–1019. doi:10.1051/0004-6361:20035959. ISSN 0004-6361. Bibcode: 2004A&A...418..989N.
- ↑ 8.0 8.1 Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (February 2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition -Comments and statistics". Astronomy and Astrophysics 367 (2): 521–524. doi:10.1051/0004-6361:20000451. Bibcode: 2001A&A...367..521P.
- ↑ 9.0 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 9.9 Piccotti, Luca; Docobo, José Ángel; Carini, Roberta; Tamazian, Vakhtang S; Brocato, Enzo; Andrade, Manuel; Campo, Pedro P (3 January 2020). "A study of the physical properties of SB2s with both the visual and spectroscopic orbits". Monthly Notices of the Royal Astronomical Society 492 (2): 2709–2721. doi:10.1093/mnras/stz3616. ISSN 0035-8711. Bibcode: 2020MNRAS.492.2709P.
- ↑ Piters, A. J.M.; van Paradijs, J.; Schmitt, J. H.M.M. (February 1998). "X-ray/optical observations of stars with shallow convection zones (A8 - G2 V)". Astronomy and Astrophysics Supplement Series 128 (1): 29–33. doi:10.1051/aas:1998126. ISSN 0365-0138. Bibcode: 1998A&AS..128...29P.
- ↑ 11.0 11.1 Rocha-Pinto, H. J.; Maciel, W. J. (1 August 1998). "Metallicity effects on the chromospheric activity-age relation for late-type dwarfs". Monthly Notices of the Royal Astronomical Society 298 (2): 332–346. doi:10.1046/j.1365-8711.1998.01597.x. ISSN 0035-8711. Bibcode: 1998MNRAS.298..332R.
- ↑ 12.0 12.1 Netopil, Martin (4 May 2017). "Metallicity calibrations for dwarf stars and giants in the Geneva photometric system". Monthly Notices of the Royal Astronomical Society 469 (3): 3042–3055. doi:10.1093/mnras/stx1077. ISSN 0035-8711. Bibcode: 2017MNRAS.469.3042N.
- ↑ 13.0 13.1 Tokovinin, Andrei (14 March 2014). "From Binaries to Multiples. II. Hierarchical Multiplicity of F and G Dwarfs". The Astronomical Journal 147 (4): 87. doi:10.1088/0004-6256/147/4/87. ISSN 0004-6256. Bibcode: 2014AJ....147...87T.
- ↑ "HR 512". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HR+512.
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