Elektra (star)
Star Elektra (17 Tauri) |
|||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pleiades: Elektra on the right | |||||||||||||||||||
AladinLite | |||||||||||||||||||
Observation dates equinox : J2000.0 , epoch : J2000.0 |
|||||||||||||||||||
Constellation | bull | ||||||||||||||||||
Right ascension | 03 h 44 m 52.54 s | ||||||||||||||||||
declination | + 24 ° 06 ′ 48.1 ″ | ||||||||||||||||||
Apparent brightness | 3.70 mag | ||||||||||||||||||
Typing | |||||||||||||||||||
B − V color index | (–0.11) | ||||||||||||||||||
U − B color index | (−0.40) | ||||||||||||||||||
R − I index | (−0.09) | ||||||||||||||||||
Spectral class | B6 IIIe | ||||||||||||||||||
Variable star type | SPB | ||||||||||||||||||
Astrometry | |||||||||||||||||||
Radial velocity | (6.7 ± 1.4) km / s | ||||||||||||||||||
parallax | (8.06 ± 0.25) mas | ||||||||||||||||||
distance | (405 ± 15) ly (125) pc |
||||||||||||||||||
Proper movement | |||||||||||||||||||
Rec. Share: | (20.8 ± 0.3) mas / a | ||||||||||||||||||
Dec. portion: | (-46.1 ± 0.2) mas / a | ||||||||||||||||||
Physical Properties | |||||||||||||||||||
Dimensions | (4.65 ± 0.05) M ☉ | ||||||||||||||||||
radius | (6.3 ± 0.7) R ☉ | ||||||||||||||||||
Effective temperature | (12750 ± 500) K. | ||||||||||||||||||
Other names and catalog entries |
|||||||||||||||||||
|
Elektra is the proper name of the star 17 Tauri in the Pleiades .
Like all stars of the Pleiades, Elektra can occasionally be covered by the moon and (very rarely!) Also by planets . The last occultation of Electra by a planet was on May 9, 1841 by Venus .
Elektra has an apparent magnitude of +3.70 mag and belongs to the spectral class B6 IIIe. The star is a roughly 400 light-years from the sun distant Be star and also one of the slowly pulsating B stars .
Web links
Commons : Elektra - collection of images, videos and audio files
Individual evidence
- ↑ a b c d e f g h i 17 Tau. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed January 27, 2019 .
- ↑ a b NSV 15755. In: VSX. AAVSO, accessed July 21, 2018 .
- ↑ J. Zorec, Y. Fremat, L. Cidale: On the evolutionary status of Be stars. I. Field Be stars near the Sun . In: Astronomy and Astrophysics . 441, 2005, p. 235. arxiv : astro-ph / 0509119 . bibcode : 2005A & A ... 441..235Z . doi : 10.1051 / 0004-6361: 20053051 .
- ↑ a b TR White, BJS Pope, V. Antoci, PI Pápics, C. Aerts, DR Gies, K. Gordon, D. Huber, GH Schaefer, S. Aigrain, S. Albrecht, T. Barclay, G. Barentsen, PG Beck, TR Bedding, M. Fredslund Andersen, F. Grundahl, SB Howell, MJ Ireland, SJ Murphy, MB Nielsen, V. Silva Aguirre, PG Tuthill: Beyond the Kepler / K2 bright limit: Variability in the seven brightest members of the Pleiades . In: Monthly Notices of the Royal Astronomical Society . 471, No. 3, 2017, pp. 2882–2901. arxiv : 1708.07462 . bibcode : 2017MNRAS.471.2882W . doi : 10.1093 / mnras / stx1050 .