To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

How to transfigure the Wikipedia

Would you like Wikipedia to always look as professional and up-to-date? We have created a browser extension. It will enhance any encyclopedic page you visit with the magic of the WIKI 2 technology.

Try it — you can delete it anytime.

Install in 5 seconds
4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
Great Wikipedia has got greater.
.
Leo
Newton
Brights
Milds

Theta Persei

From Wikipedia, the free encyclopedia

θ Persei
Location of θ Persei (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 02h 44m 11.98704s[1]
Declination +49° 13′ 42.4111″[1]
Apparent magnitude (V) 4.11[2] / 9.987[3]
Characteristics
θ Per A
Evolutionary stage Main sequence
Spectral type F8 V[4]
U−B color index +0.00[5]
B−V color index +0.49[5]
θ Per B
Spectral type M1.5 V[6]
B−V color index +1.48[7]
Astrometry
Radial velocity (Rv)+24.32[8] km/s
Proper motion (μ) RA: +334.66[1] mas/yr
Dec.: -89.99[1] mas/yr
Parallax (π)89.87 ± 0.22 mas[1]
Distance36.29 ± 0.09 ly
(11.13 ± 0.03 pc)
Absolute magnitude (MV)3.88[9]
Orbit[10]
Period (P)2,720 yr
Semi-major axis (a)22.289″
Eccentricity (e)0.13
Inclination (i)75.44°
Longitude of the node (Ω)128°
Periastron epoch (T)B 1613
Argument of periastron (ω)
(secondary)		100.64°
Details
θ Per A
Mass1.138±0.010[11] M☉
Radius1.319±0.011[11] R☉
Luminosity2.235±0.040[11] L☉
Surface gravity (log g)4.43±0.17[12] cgs
Temperature6,328±86[12] K
Metallicity [Fe/H]−0.03±0.09[12] dex
Age4.0±0.4[11] Gyr
θ Per B
Mass0.521±0.052[3] M☉
Radius0.498±0.017[3] R☉
Temperature3,685±60[3] K
Metallicity [Fe/H]−0.03±0.09[12] dex
Age2.4[3] Gyr
Other designations
θ Per, BD+48°746, GJ 107, CCDM J02441+4913, IDS 02374+4848, WDS J02442+4914
θ Per A: 13 Persei, HR 799, HD 16895, HIP 12777, FK5 93, GC 3277, PPM 45428, SAO 38288
θ Per B: 2MASS J02441025+4913540
Database references
SIMBADθ Per
θ Per A
θ Per B

Theta Persei (Theta Per, θ Persei, θ Per) is a star system 37 light years away from Earth, in the constellation Perseus. It is one of the closest naked-eye stars.

The primary star is a yellowish dwarf (main sequence) star of spectral type F8V, which is somewhat larger and brighter than the Sun, but still within the range considered to have the potential for Earth-like planets. There is also a red dwarf companion of spectral type M1.V, orbiting about 250 AU from the primary. It has a Gaia Data Release 2 parallax of 89.2871±0.1534 mas, corresponding to a distance of 11.2 pc.[13]

An 11th-magnitude star is listed in double-star catalogues as component C of the multiple system. It was 95″ away from component A in 2002,[14] although the separation is rapidly increasing as it is a distant background object with a very different proper motion to the other two stars.[15] An unconfirmed companion, possibly a brown dwarf, was reported 6.2″ from θ Persei B in 2010.[16]

YouTube Encyclopedic

  • 1/1
    Views:
    10 024
  • Skarby jesiennego nieba. Gwiazdozbiór Perseusza - AstroLife

Transcription

References

  1. ^ a b c d e van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
  2. ^ Van Belle, Gerard T.; von Braun, Kaspar (2009). "Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars". The Astrophysical Journal. 694 (2): 1085–1098. arXiv:0901.1206. Bibcode:2009ApJ...694.1085V. doi:10.1088/0004-637X/694/2/1085.
  3. ^ a b c d e Mann, Andrew W.; Feiden, Gregory A.; Gaidos, Eric; Boyajian, Tabetha; von Braun, Kaspar (2015). "How to Constrain Your M Dwarf: Measuring Effective Temperature, Bolometric Luminosity, Mass, and Radius". The Astrophysical Journal. 804 (1): 38. arXiv:1501.01635. Bibcode:2015ApJ...804...64M. doi:10.1088/0004-637X/804/1/64. S2CID 19269312.
  4. ^ Abt, H. A. (1981). "Visual multiples. VII. MK classifications". The Astrophysical Journal Supplement Series. 45: 437. Bibcode:1981ApJS...45..437A. doi:10.1086/190719.
  5. ^ a b Hoffleit, D.; Jaschek, C. (1991). The Bright Star Catalogue. New Haven: Yale University Observatory. Bibcode:1991bsc..book.....H.
  6. ^ Alonso-Floriano, F. J.; Morales, J. C.; Caballero, J. A.; Montes, D.; Klutsch, A.; Mundt, R.; Cortés-Contreras, M.; Ribas, I.; Reiners, Ansgar; Amado, P. J.; Quirrenbach, A.; Jeffers, S. V. (2015). "CARMENES input catalogue of M dwarfs" (PDF). Astronomy & Astrophysics. 577: A128. arXiv:1502.07580. Bibcode:2015A&A...577A.128A. doi:10.1051/0004-6361/201525803. S2CID 53135130.[permanent dead link]
  7. ^ Weis, Edward W. (1999). "Photometry of Late Dwarf Stars". The Astronomical Journal. 117 (6): 3021–3024. Bibcode:1999AJ....117.3021W. doi:10.1086/300900.
  8. ^ Nidever, David L.; et al. (August 2002), "Radial Velocities for 889 Late-Type Stars", The Astrophysical Journal Supplement Series, 141 (2): 503–522, arXiv:astro-ph/0112477, Bibcode:2002ApJS..141..503N, doi:10.1086/340570, S2CID 51814894.
  9. ^ Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191, S2CID 118577511.
  10. ^ Boulé, Cory; Andrews, Kaitlyn; Penfield, Andrew; Puckette, Ian; Goodale, Keith A.; Harfenist, Steven A. (2017). "Determining Binary Star Orbits Using Kepler's Equation" (PDF). Journal of Double Star Observations. 13 (2): 189. Bibcode:2017JDSO...13..189B.
  11. ^ a b c d Boyajian, Tabetha S.; et al. (February 2012), "Stellar Diameters and Temperatures. I. Main-sequence A, F, and G Stars", The Astrophysical Journal, 746 (1): 101, arXiv:1112.3316, Bibcode:2012ApJ...746..101B, doi:10.1088/0004-637X/746/1/101, S2CID 18993744. See Table 10, 12.
  12. ^ a b c d Bonfils, Xavier; Delfosse, Xavier; Udry, Stéphane; Santos, Nuno C.; Forveille, Thierry; Ségransan, Damien (2005). "Metallicity of M dwarfs. I. A photometric calibration and the impact on the mass-luminosity relation at the bottom of the main sequence". Astronomy and Astrophysics. 442 (2): 635–642. arXiv:astro-ph/0503260. Bibcode:2005A&A...442..635B. doi:10.1051/0004-6361:20053046. S2CID 13900901.
  13. ^ 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.
  14. ^ Mason, Brian D.; et al. (December 2001), "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog", The Astronomical Journal, 122 (6): 3466–3471, Bibcode:2001AJ....122.3466M, doi:10.1086/323920
  15. ^ 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.
  16. ^ Tanner, Angelle M.; Gelino, Christopher R.; Law, Nicholas M. (2010). "A High-Contrast Imaging Survey ofSIM Lite Planet Search Targets". Publications of the Astronomical Society of the Pacific. 122 (896): 1195–1206. arXiv:1007.4315. Bibcode:2010PASP..122.1195T. doi:10.1086/656481. S2CID 118459054.

External links

This page was last edited on 24 September 2023, at 22:17
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.
Contact WIKI 2
Introduction
Terms of Service
Privacy Policy