Phi Velorum

"Tseen Ke" redirects here. The term may also refer to Lambda Velorum.

Phi Velorum (φ Vel, φ Velorum) is a star in the constellation Vela. It is a blue-white B-type supergiant with an apparent magnitude of +3.53. It is approximately 1,590 light years from Earth.

φ Velorum

Location of φ Velorum (circled)
Observation data Epoch J2000      Equinox J2000
Constellation	Vela
Right ascension	09h 56m 51.742s[1]
Declination	−54° 34′ 04.04″[1]
Apparent magnitude (V)	3.53[2]
Characteristics
Spectral type	B5 Ib[3]
U−B color index	−0.62[2]
B−V color index	−0.08[2]
Astrometry
Radial velocity (Rv)	13.9[4] km/s
Proper motion (μ)	RA: −13.08 ± 0.10[1] mas/yr Dec.: 3.55 ± 0.10[1] mas/yr
Parallax (π)	2.05 ± 0.11 mas[1]
Distance	1,590 ± 90 ly (490 ± 30 pc)
Absolute magnitude (MV)	−5.4[5]
Details
Mass	10.1[6] M☉
Radius	31[5] R☉
Luminosity	28,200[5] L☉
Surface gravity (log g)	2.55[7] cgs
Temperature	14,600[7] K
Rotational velocity (v sin i)	17[7] km/s
Age	22.6[6] Myr
Other designations
Tseen Ke,[8] HR 3940, HD 86440, SAO 237522, CD−53°3251, FK5 375, GC 13711, HIP 48774, 2MASS J09565173-5434041, IRAS 09550-5419, WDS J09569-5434, CCDM 09569-5434
Database references
SIMBAD	data

Nomenclature

φ Velorum (Latinised to Phi Velorum, abbreviated to φ Vel) is the Bayer designation for this star. It is also listed as HR 3940 in the Bright Star Catalogue and HD 86440 in the Henry Draper Catalogue. It has the traditional name Tseen Ke, from Chinese 天紀 (Mandarin tiānjì) "star chart". (lit. "Record of Heaven").

Properties

φ Velorum has a temperature of 14,600 K. Combined with a radius of 31 R_☉, it has a luminosity of 28,200 L_☉. It has exhausted its core hydrogen and left the main sequence to become a supergiant. It has a current mass of about 10 M_☉.

Companion

φ Velorum has an optical companion 39" away. It is a 12th magnitude K0 giant star.^[9][10]

References

1. 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. Vizier catalog entry
2. Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
3. Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90° to -53.0°. Bibcode:1975mcts.book.....H.
4. Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
5. Lefever, K.; Puls, J.; Aerts, C. (2007). "Statistical properties of a sample of periodically variable B-type supergiants. Evidence for opacity-driven gravity-mode oscillations". Astronomy and Astrophysics. 463 (3): 1093. arXiv:astro-ph/0611484. Bibcode:2007A&A...463.1093L. doi:10.1051/0004-6361:20066038. S2CID 8783008.
6. Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (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.
7. Fraser, M.; Dufton, P. L.; Hunter, I.; Ryans, R. S. I. (2010). "Atmospheric parameters and rotational velocities for a sample of Galactic B-type supergiants". Monthly Notices of the Royal Astronomical Society. 404 (3): 1306. arXiv:1001.3337. Bibcode:2010MNRAS.404.1306F. doi:10.1111/j.1365-2966.2010.16392.x. S2CID 118674151.
8. Allen, Richard Hinck (1899). Star Names & Their Meanings. Kessinger Publishing. p. 74. ISBN 978-0-7661-4028-8.^{[permanent dead link‍]}
9. Lindroos, K. P. (1985). "A study of visual double stars with early type primaries. IV Astrophysical data". Astronomy and Astrophysics Supplement Series. 60: 183. Bibcode:1985A&AS...60..183L.
10. Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920.