astro.wikisort.org - StarKIC 1145123 (sometimes mistakenly called Kepler 1145123), is a white hued star located in the northern constellation Cygnus, the swan. It has an apparent magnitude of 13.12,[2] making it readily visible in large telescopes, but not to the naked eye. The object is located relatively far at a distance of approximately 3,910 light years,[1] but is rapidly approaching the Solar System with a radial velocity of −136 km/s.[5]
Slow rotating Blue Straggler
KIC 11145123
Observation data
Epoch J2000.0 Equinox J2000.0 (ICRS) |
| Constellation |
Cygnus |
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| Right ascension |
19h 41m 25.34114s[1] |
| Declination |
+48° 45′ 14.9900″[1] |
| Apparent magnitude (V) |
13.12[2] |
| Characteristics |
| Evolutionary stage |
main sequence[1] |
| Spectral type |
A[3] |
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| B−V color index |
+0.33[2] |
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| Variable type |
δ Scuti[4] |
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| Astrometry |
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| Radial velocity (Rv) | −136±4[5] km/s |
| Proper motion (μ) | RA: −20.900 mas/yr[1]
Dec.: −3.693 mas/yr[1] |
| Parallax (π) | 0.8344 ± 0.01 mas[1] |
| Distance | 3,910 ± 50 ly
(1,200 ± 10 pc) |
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| Details |
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| Mass | 1.71±0.28[6] M☉ |
| Radius | 1.57±0.07[6] R☉ |
| Luminosity | 7.7[1] L☉ |
| Surface gravity (log g) | 4.15[1] cgs |
| Temperature | 7,654[1] K |
| Metallicity [Fe/H] | −0.61±0.15[7] dex |
| Rotation | ≈100 days[8] |
| Rotational velocity (v sin i) | 1[8] km/s |
| Age | 756[1] Myr |
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| Other designations |
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| Database references |
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| SIMBAD | data |
Characteristics
KIC 11145123 has a simple spectral classification of A, indicating that it is an A-type star. It has 1.71 times the mass of the Sun and 1.57 times its radius.[6] It radiates 7.7 times the luminosity of the Sun from its photosphere at an effective temperature of 7,654 K.[1] Unlike most hot stars, KIC 11145123 spins very slowly with a projected rotational velocity of 1 km/s.[8] This corresponds to a period of roughly 100 days.[8] Despite appearing as a main sequence star (Gaia DR3 models it as such),[1] it is most likely a blue straggler.[3][9]
Roundest natural object
KIC 11145123 is believed to currently be the roundest natural object, with the difference between equatorial and polar radii equaling a mere three kilometers.[10]
References
- Vallenari, A.; et al. (Gaia Collaboration) (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. arXiv:2208.00211. doi:10.1051/0004-6361/202243940. Gaia DR3 record for this source at VizieR.
- Zacharias, N.; Finch, C. T.; Girard, T. M.; Henden, A.; Bartlett, J. L.; Monet, D. G.; Zacharias, M. I. (2012). "VizieR Online Data Catalog: UCAC4 Catalogue (Zacharias+, 2012)". VizieR On-line Data Catalog: I/322A. Originally Published in: 2012yCat.1322....0Z; 2013AJ....145...44Z. 1322. Bibcode:2012yCat.1322....0Z.
- Hatta, Yoshiki; Sekii, Takashi; Takata, Masao; Kurtz, Donald W. (2019). "The Two-dimensional Internal Rotation of KIC 11145123". The Astrophysical Journal. 871 (2): 135. Bibcode:2019ApJ...871..135H. doi:10.3847/1538-4357/aaf881.
- Kurtz, Donald W.; Saio, Hideyuki; Takata, Masao; Shibahashi, Hiromoto; Murphy, Simon J.; Sekii, Takashi (13 August 2014). "Asteroseismic measurement of surface-to-core rotation in a main-sequence A star, KIC 11145123". Monthly Notices of the Royal Astronomical Society. 444 (1): 102–116. arXiv:1405.0155. Bibcode:2014MNRAS.444..102K. doi:10.1093/mnras/stu1329. eISSN 1365-2966. ISSN 0035-8711.
- Tsantaki, M.; Pancino, E.; Marrese, P.; Marinoni, S.; Rainer, M.; Sanna, N.; Turchi, A.; Randich, S.; Gallart, C.; Battaglia, G.; Masseron, T. (March 2022). "Survey of Surveys". Astronomy & Astrophysics. 659: A95. arXiv:2110.09316. Bibcode:2022A&A...659A..95T. doi:10.1051/0004-6361/202141702. eISSN 1432-0746. ISSN 0004-6361.
- Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. eISSN 1538-3881.
- Berger, Travis A.; Huber, Daniel; van Saders, Jennifer L.; Gaidos, Eric; Tayar, Jamie; Kraus, Adam L. (27 May 2020). "The Gaia–Kepler Stellar Properties Catalog. I. Homogeneous Fundamental Properties for 186,301 Kepler Stars". The Astronomical Journal. 159 (6): 280. arXiv:2001.07737. Bibcode:2020AJ....159..280B. doi:10.3847/1538-3881/159/6/280. eISSN 1538-3881.
- Takada-Hidai, Masahide; Kurtz, Donald W.; Shibahashi, Hiromoto; Murphy, Simon J.; Takata, Masao; Saio, Hideyuki; Sekii, Takashi (2017). "Spectroscopic and asteroseismic analysis of the remarkable main-sequence a star KIC 11145123". Monthly Notices of the Royal Astronomical Society. 470 (4): 4908. arXiv:1706.04314. Bibcode:2017MNRAS.470.4908T. doi:10.1093/mnras/stx1506.
- Hatta, Yoshiki; Sekii, Takashi; Takata, Masao; Benomar, Othman (2021). "Nonstandard Modeling of a Possible Blue Straggler Star, KIC 11145123". The Astrophysical Journal. 923 (2): 244. arXiv:2110.06926. Bibcode:2021ApJ...923..244H. doi:10.3847/1538-4357/ac23c9. S2CID 238856685.
- "Kepler 11145123 is Most Spherical Natural Object Ever Seen, Astronomers Say | Astronomy | Sci-News.com". Breaking Science News | Sci-News.com. Retrieved 2021-04-26.
На других языках
[de] KIC 11145123
KIC 11145123 (auch Kepler 11145123) ist ein 4.000 Lichtjahre entfernter Blauer Riese mit einem Durchmesser 1,5 Millionen Kilometern. Er gehört zu den Veränderlichen Sternen.
- [en] KIC 11145123
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