Zeta Cassiopeiae

ζ Cassiopeiae

ζ Cassiopeiae is found just south of the W asterism
Observation data
Epoch J2000      Equinox J2000
Constellation Cassiopeia
Right ascension 00h 36m 58.28419s[1]
Declination +53° 53′ 48.8673″[1]
Apparent magnitude (V) 3.66[2] (3.59 - 3.68[3])
Characteristics
Spectral type B2IV[4]
U−B color index –0.89[5]
B−V color index –0.19[5]
Variable type SPB[3]
Astrometry
Radial velocity (Rv)2.0[3] km/s
Proper motion (μ) RA: 17.38[1] mas/yr
Dec.: –9.86[1] mas/yr
Parallax (π)5.50 ± 0.16 mas[1]
Distance590 ± 20 ly
(182 ± 5 pc)
Absolute magnitude (MV)–2.8[6]
Details[3]
Mass8.3 M☉
Radius5.9 R☉
Luminosity5,500 L☉
Surface gravity (log g)3.81 cgs
Temperature20,426 K
Metallicity [Fe/H]–0.23[7] dex
Rotation5.37045
Rotational velocity (v sin i)17 ± 3 km/s
Other designations
Fulu, Zet Cas, ζ Cas, 17 Cassiopeiae, BD+53°105, FK5 17, GC 727, HD 3360, HIP 2920, HR 153, SAO 21566[8]
Database references
SIMBADdata

Zeta Cassiopeiae, Latinized from ζ Cassiopeiae, and officially named Fulu /ˈfuːluː/,[9] is a variable star[8] in the constellation of Cassiopeia. It has a blue-white hue and is classified as a B-type subgiant with an apparent magnitude of +3.66. Based upon parallax measurements, it is approximately 590 light-years from the Sun.

  1. ^ a b c d e Cite error: The named reference aaa474_2_653 was invoked but never defined (see the help page).
  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: 0. Bibcode:2002yCat.2237....0D.
  3. ^ a b c d Neiner, C.; Geers, V. C.; Henrichs, H. F.; Floquet, M.; Frémat, Y.; Hubert, A.-M.; Preuss, O.; Wiersema, K. (2003). "Discovery of a magnetic field in the Slowly Pulsating B star zeta Cassiopeiae" (PDF). Astronomy and Astrophysics. 406 (3): 1019. Bibcode:2003A&A...406.1019N. doi:10.1051/0004-6361:20030742.
  4. ^ Cite error: The named reference araa11_29 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference clpl4 was invoked but never defined (see the help page).
  6. ^ Jaschek, C.; Gomez, A. E. (1998). "The absolute magnitude of the early type MK standards from HIPPARCOS parallaxes". Astronomy and Astrophysics. 330: 619. Bibcode:1998A&A...330..619J.
  7. ^ Cite error: The named reference spj1_387_673 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ "Naming Stars". IAU.org. Retrieved 16 December 2017.