HD 9986
| Opazovalni podatki Epoha J2000 Enakonočje J2000 | |
|---|---|
| Ozvezdje | Ribi |
| Rektascenzija | 01h 37m 40,87927s[1] |
| Deklinacija | +12° 04′ 42,1714″[1] |
| Navidezni sij (V) | 6,77[2] |
| Značilnosti | |
| Spektralni razred | G5 V[3] |
| B−V Barvni indeks | 0648±0008[2] |
| Astrometrija | |
| Radialna hitrost (Rv) | −21024±00006[1] km/s |
| Lastno gibanje (μ) | RA: +120,150[1] mas/l Dec.: +6,057[1] mas/l |
| Paralaksa (π) | 39,2718 ± 0,0405[1] mas |
| Oddaljenost | 83.05 ± 0.09 sv. l. (25.46 ± 0.03 pc) |
| Absolutni izsev (MV) | 4,73[2] |
| Podrobnosti[4] | |
| Masa | 1,02[3] M☉ |
| Polmer | 104+002 −001[1] R☉ |
| Izsev | 1103±0002[1] L☉ |
| Površinska težnost (log g) | 443±001 cgs |
| Temperatura | 5,831±5 K |
| Kovinskost [Fe/H] | +0095±0005 dex |
| Vrtenje | 23[5] days |
| Tirna hitrost(v sin i) | 190±015 km/s |
| Starost | 329±051 Ga |
| Druge oznake | |
| Sklici na podatkovne baze | |
| SIMBAD | podatki |
HD 9986 je Soncu podobna zvezda, ki leži v ekvatorialnem ozvezdju Rib. Z navidezno magnitudo 6,77[7] leži pod normalno vidljivostjo s prostim očesom. Zvezda je od nas oddaljena 83 svetlobnih let na podlagi paralakse, a se nam bliža z radialno hitrostjo -21 km/s.[8]
To telo je zvezda glavne veje tipa G z zvezdnim razredom G5 V.[9] Je sončev dvojček s fizikalnimi značilnostmi, ki so podobne sončevim. Stara je 3,3 milijarde let[10] in se vrti počasi z rotacijsko periodo 23 dni. V posebni raziskavi zvezdnih škratov tipa G, ki jo je leta 2002 napisal Elliott P. Horch, je bilo ugotovljeno, da HD 9986 morda ni ena sama zvezda.[11]
Viri
- ↑ 1,0 1,1 1,2 1,3 1,4 1,5 1,6 1,7 Brown, A. G. A.; in sod. (Gaia collaboration) (Avgust 2018). »Gaia Data Release 2: Summary of the contents and survey properties«. Astronomy & Astrophysics. Zv. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Zapis Gaia DR2 za ta vir na VizieR.
- ↑ 2,0 2,1 2,2 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.
- ↑ 3,0 3,1 Vidotto, A. A.; in sod. (Julij 2014). »Stellar magnetism: empirical trends with age and rotation« (PDF). Monthly Notices of the Royal Astronomical Society. Cornell University - Astronomy & Astrophysics manuscript. 441 (3): 2361–2374. arXiv:1404.2733. Bibcode:2014MNRAS.441.2361V. doi:10.1093/mnras/stu728. Arhivirano iz prvotnega spletišča (PDF) dne 17. oktobra 2021. Pridobljeno 13. julija 2016.
- ↑ dos Santos, Leonardo A.; in sod. (Avgust 2016). »The Solar Twin Planet Search. IV. The Sun as a typical rotator and evidence for a new rotational braking law for Sun-like stars«. Astronomy & Astrophysics. 592: 8. arXiv:1606.06214. Bibcode:2016A&A...592A.156D. doi:10.1051/0004-6361/201628558. A156.
- ↑ See, V.; Jardine, M.; Vidotto, A. A.; Donati, J. -F.; Boro Saikia, S.; Fares, R.; Folsom, C. P.; Jeffers, S. V.; Marsden, S. C.; Morin, J.; Petit, P.; BCool Collaboration (Februar 2018). »The open flux evolution of a solar-mass star on the main sequence«. Monthly Notices of the Royal Astronomical Society. 474 (1): 536–546. arXiv:1711.03904. Bibcode:2018MNRAS.474..536S. doi:10.1093/mnras/stx2599.
- ↑ »HD 9986«. SIMBAD. Centre de données astronomiques de Strasbourg. Pridobljeno 13. julija 2016.
- ↑ 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.
- ↑ 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.
- ↑ Vidotto, A. A.; et al. (July 2014). "Stellar magnetism: empirical trends with age and rotation" Arhivirano 2021-10-17 na Wayback Machine. (PDF). Monthly Notices of the Royal Astronomical Society. Cornell University - Astronomy & Astrophysics manuscript. 441 (3): 2361–2374. arXiv:1404.2733. Bibcode:2014MNRAS.441.2361V. doi:10.1093/mnras/stu728. Retrieved July 13, 2016.
- ↑ Vidotto, A. A.; et al. (July 2014). "Stellar magnetism: empirical trends with age and rotation" Arhivirano 2021-10-17 na Wayback Machine. (PDF). Monthly Notices of the Royal Astronomical Society. Cornell University - Astronomy & Astrophysics manuscript. 441 (3): 2361–2374. arXiv:1404.2733. Bibcode:2014MNRAS.441.2361V. doi:10.1093/mnras/stu728. Retrieved July 13, 2016.
- ↑ Gray, R. O.; in sod. (Oktober 2003). »Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I«. The Astronomical Journal. 126 (4): 2048–2059. arXiv:astro-ph/0308182. Bibcode:2003AJ....126.2048G. doi:10.1086/378365.
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