astro.wikisort.org - StarKX Andromedae (often abbreviated to KX And) is a spectroscopic binary star in the constellation Andromeda. Its apparent visual magnitude varies between 6.88 and 7.28.[4]
Spectroscopic binary star in the constellation Andromeda
KX Andromedae
|
Observation data Epoch J2000 Equinox J2000 |
Constellation |
Andromeda |
Right ascension |
23h 07m 06.2120s[3] |
Declination |
+50° 11′ 32.4891″[3] |
Apparent magnitude (V) |
6.88 – 7.28 variable[4] |
Characteristics |
Spectral type |
B3pe+K1III[5] |
Apparent magnitude (U) |
6.79[6] |
Apparent magnitude (B) |
7.25[6] |
Apparent magnitude (V) |
6.92[6] |
Apparent magnitude (G) |
6.8227[3] |
Apparent magnitude (J) |
5.845[7] |
Apparent magnitude (H) |
5.33[6] |
Apparent magnitude (K) |
5.19[6] |
Variable type |
Be star |
Astrometry |
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|
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Radial velocity (Rv) | −7.8±0.9[8] km/s |
Proper motion (μ) | RA: 1.697±0.057 [3] mas/yr Dec.: −0.788±0.048[3] mas/yr |
Parallax (π) | 1.2444 ± 0.0328 mas[3] |
Distance | 2,620 ± 70 ly (800 ± 20 pc) |
|
Orbit[9] |
---|
Period (P) | 38.919 days |
Eccentricity (e) | 0±0.03 |
Inclination (i) | 50±5° |
Periastron epoch (T) | HJD 2423220.25±0.09 |
Semi-amplitude (K2) (secondary) | 86.2±0.8 km/s |
Details |
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Primary |
---|
Mass | 9.0±0.1[10] M☉ |
Age | 22.4±3.1[10] Myr |
Secondary |
---|
Radius | 19±4[9] R☉ |
Surface gravity (log g) | 2.0±0.5[9] cgs |
Temperature | 5000±400[9] K |
Rotational velocity (v sin i) | 25±5[9] km/s |
Other designations |
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2MASS J23070621+5011324, AAVSO 2302+49, BD+49 4045, HIP 114154, HD 218393, SAO 52701, TYC 3631-1533-1 |
Database references |
---|
SIMBAD | data |
The primary component of the KX Andromedae system is a Be star with a spectral classification B3pe as in 2017,[4] although on historical record it has varied from B1 to B7.[11]
The secondary star is difficult to detect in the spectrum, but has been given a K1III spectral type. It is likely to be an asymptotic giant branch star that fills its Roche lobe.[9]
The system is only about 25 million years old. The pair complete a circular orbit every 38.919 days at an inclination of 50°.[9]
References
- "/ftp/cats/more/HIP/cdroms/cats". Centre de Données astronomiques de Strasbourg. Strasbourg astronomical Data Center. Retrieved 15 October 2022.
- Koen, Chris; Eyer, Laurent (March 2002). "New periodic variables from the Hipparcos epoch photometry". Monthly Notices of the Royal Astronomical Society. 331 (1): 45–59. Bibcode:2002MNRAS.331...45K. doi:10.1046/j.1365-8711.2002.05150.x.
- 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.
- KX And, database entry, Combined General Catalog of Variable Stars (GCVS5.1, 2017 Ed.), N. N. Samus, O. V. Durlevich, et al., CDS ID II/250 Accessed on line 2018-10-17.
- Shenavrin, V. I.; Taranova, O. G.; Nadzhip, A. E. (2011). "Search for and study of hot circumstellar dust envelopes". Astronomy Reports. 55 (1): 31–81. Bibcode:2011ARep...55...31S. doi:10.1134/S1063772911010070. S2CID 122700080.
- Database entry, Catalogue of Stellar Photometry in Johnson's 11-color system (2002 Ed.), J. R. Ducati, CDS ID II/237 Accessed on line 2018-11-10.
- Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E.; Fowler, John W.; Gizis, John E.; Howard, Elizabeth V.; Huchra, John P.; Jarrett, Thomas H.; Kopan, Eugene L.; Kirkpatrick, J. Davy; Light, Robert M.; Marsh, Kenneth A.; McCallon, Howard L.; Schneider, Stephen E.; Stiening, Rae; Sykes, Matthew J.; Weinberg, Martin D.; Wheaton, William A.; Wheelock, Sherry L.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". CDS/ADC Collection of Electronic Catalogues. 2246: II/246. Bibcode:2003yCat.2246....0C.
- Pourbaix, D.; et al. (September 2004), "SB9: The ninth catalogue of spectroscopic binary orbits", Astronomy and Astrophysics, 424 (2): 727–732, arXiv:astro-ph/0406573, Bibcode:2004A&A...424..727P, doi:10.1051/0004-6361:20041213, S2CID 119387088.
- Tarasov, A. E.; Berdyugina, S. V.; Berdyugin, A. V. (May 1998), "The massive interacting binary KX And: The orbit and physical parameters of the secondary component", Astronomy Letters, 24 (3): 316–320, Bibcode:1998AstL...24..316T
- Tezlaff, N.; Neuhäuser, R.; Hohle, N. N. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv:1007.4883, Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x, S2CID 118629873
- Koubský, P.; Harmanec, P.; Brož, M.; Kotková, L.; Yang, S.; Božić, H.; Sudar, D.; Frémat, Y.; Korčáková, D.; Votruba, V.; Škoda, P.; Šlechta, M.; Ruždjak, D. (2019), "Properties and nature of be stars", Astronomy & Astrophysics, 629: A105, arXiv:1908.02719, doi:10.1051/0004-6361/201834597, S2CID 199472856
Constellation of Andromeda |
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Stars | |
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Nebulae | |
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На других языках
- [en] KX Andromedae
[ru] KX Андромеды
KX Андромеды (лат. KX Andromedae), HD 218393 — двойная звезда[5][6][7][8] в созвездии Андромеды на расстоянии приблизительно 2620 световых лет (около 804 парсеков) от Солнца. Видимая звёздная величина звезды — от +7,28 до +6,88m[9]. Орбитальный период — около 38,919 суток[10]. Возраст звезды оценивается как около 22,4 млн лет[11].
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