Hubbry Logo
search button
Sign in
Theta2 Crucis
Theta2 Crucis
Comunity Hub
MainMain
arrow-down
History
arrow-down
starMore
arrow-down
Sign in
Sign in
bob

Bob

Have a question related to this hub?

bob

Alice

Got something to say related to this hub?
Share it here.

#general is a chat channel to discuss anything related to the hub.
Hubbry Logo
search button
Sign in
Theta2 Crucis
Theta2 Crucis
Community hub for the Wikipedia article
logoWikipedian hub
Theta2 Crucis
Theta2 Crucis
Main
Welcome to the community hub built on top of the Theta2 Crucis Wikipedia article. Here, you can discuss, collect, and organize anything related to Theta2 Crucis. The purpose of the hub is to connect peopl...
Add your contribution
Media Collections
1
Timelines
0
Articles
0
Notes collections
0
Days in Chronicle
0
Theta2 Crucis
θ2 Crucis

A light curve for Theta2 Crucis, plotted from TESS data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Crux
Right ascension 12h 04m 19.22008s[2]
Declination −63° 09′ 56.5167″[2]
Apparent magnitude (V) 4.70 - 4.74[3]
Characteristics
Spectral type B3 V[4]
U−B color index −0.61[5]
B−V color index −0.08[5]
Variable type β Cep[3]
Astrometry
Radial velocity (Rv)+16.3[6] km/s
Proper motion (μ) RA: −18.467[2] mas/yr
Dec.: +0.467[2] mas/yr
Parallax (π)4.7314±0.1276 mas[2]
Distance690 ± 20 ly
(211 ± 6 pc)
Absolute magnitude (MV)−2.35[7]
Orbit[8]
Period (P)3.428 d
Eccentricity (e)0.00
Periastron epoch (T)2419604.367 JD
Semi-amplitude (K1)
(primary)		51.3 km/s
Details
Mass5.9[2] M☉
Radius6.9[2] R☉
Luminosity1,935[2] L☉
Surface gravity (log g)3.55[2] cgs
Temperature15,361[2] K
Metallicity [Fe/H]+0.20[2] dex
Rotational velocity (v sin i)23[9] km/s
Age18.5[10] Myr
Other designations
θ2 Cru, CD−62°610, HD 104841, HIP 58867, HR 4603, SAO 251717[11]
Database references
SIMBADdata

Theta2 Crucis, Latinized from θ2 Crucis, is a spectroscopic binary star in the constellation Crux. This pair of stars complete an orbit every 3.4280 days and they have a low orbital eccentricity that is close to 0.0.[12] Theta2 Crucis is located at about 690 light-years from the Sun.

Since a member of the system is a β Cephei-type variable star, the magnitude is not fixed but varies slightly between +4.70 and +4.74. The period of this variability is 0.0889 days.[3] The system is categorized as is a blue-white B-type main sequence star with a stellar classification of B3 V,[4] although it has also been classified as a subgiant.[13] Evolutionary models show it at a late stage of its main sequence life.[2]

References

[edit]
  1. ^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 6 December 2022.
  2. ^ a b c d e f g h i j k l Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  3. ^ a b c Samus, N. N.; Durlevich, O. V.; et al. (January 2009). "General Catalogue of Variable Stars". VizieR. Retrieved 2010-05-19. Note: query for GCVS "tet 2 Cru".
  4. ^ a b Houk, N.; Cowley, A. P. (1975), University of Michigan Catalogue of two-dimensional spectral types for the HD stars, vol. 1, Bibcode:1975mcts.book.....H.
  5. ^ a b Johnson, H. L.; Iriarte, B.; Mitchell, R. I.; Wisniewskj, W. Z. (1966). "UBVRIJKL photometry of the bright stars". Communications of the Lunar and Planetary Laboratory. 4 (99): 99. Bibcode:1966CoLPL...4...99J.
  6. ^ Wilson, Ralph Elmer (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication. Washington: Carnegie Institution of Washington. Bibcode:1953GCRV..C......0W.
  7. ^ 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, S2CID 119257644.
  8. ^ Pourbaix, D.; Tokovinin, A. A.; Batten, A. H.; Fekel, F. C.; Hartkopf, W. I.; et al. (2004), "SB9: The ninth catalogue of spectroscopic binary orbits", Astronomy & Astrophysics, 424 (2): 727–732, arXiv:astro-ph/0406573, Bibcode:2004A&A...424..727P, doi:10.1051/0004-6361:20041213, S2CID 119387088.
  9. ^ Bernacca, P. L.; Perinotto, M. (1970). "A catalogue of stellar rotational velocities". Contributi Osservatorio Astronomico di Padova in Asiago. 239 (1): 1. Bibcode:1970CoAsi.239....1B.
  10. ^ Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (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
  11. ^ "V* tet02 Cru". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2010-05-19.
  12. ^ Batten, A. H. (1967). "Sixth catalogue of the orbital elements of spectroscopic binary systems". Publications of the Dominion Astrophysical Observatory, Victoria. 13: 154–155. Bibcode:1967PDAO...13..119B.
  13. ^ Skiff, B. A. (2014). "VizieR Online Data Catalog: Catalogue of Stellar Spectral Classifications (Skiff, 2009-2016)". VizieR On-line Data Catalog: B/Mk. Originally Published in: Lowell Observatory (October 2014). 1. Bibcode:2014yCat....1.2023S.
Hub tags