Back V509 Cassiopeiae AST V509 Cassiopeiae BS V509 Cassiopeiae Catalan V509 Cassiopeiae German V509 Cassiopeiae Spanish وی۵۰۹ ذات‌الکرسی Persian V509 Cassiopeiae Finnish V509 Cassiopeiae French V509 Cassiopeiae Hungarian V509 Cassiopeiae Italian

V509 Cassiopeiae

V509 Cassiopeiae

The visual band light curve for V509 Cassiopeiae, adapted from Percy and Zsoldos (1992)[1]
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cassiopeia[2]
Right ascension 23h 00m 05.101221s[3]
Declination +56° 56′ 43.3509″[3]
Apparent magnitude (V) +4.6 - +6.1[4]
Characteristics
Spectral type G0Ia0 (K5Ia0 - A6Ia+[5])[6]
U−B color index +1.33[7]
B−V color index +1.0 - +1.7[6]
Variable type SRd[4]
Astrometry
Radial velocity (Rv)−50.20[8] km/s
Proper motion (μ) RA: −3.013 mas/yr[3]
Dec.: −2.213 mas/yr[3]
Parallax (π)0.2507±0.0633 mas[3]
Distance12,400+2,100
−2,600 ly
(3,800+640
−800 pc)[9]
Absolute magnitude (MV)−8.6 (variable)[6]
Details
Mass10.6 or 19.6[6] M☉
Radius511±112[10] R☉
Luminosity269,000[11]
178,000 – 240,000[12]
400,000[6] L☉
Temperature5,000–5,300[12] K
Metallicity [Fe/H]0.0[13] dex
Other designations
HR 8752, HD 217476, FK5 3839, HIP 113561, SAO 35039, AAVSO 2255+56
Database references
SIMBADdata

V509 Cassiopeiae (V509 Cas or HR 8752) is one of two yellow hypergiant stars found in the constellation Cassiopeia, which also contains Rho Cassiopeiae.

HR 8752 is around 12,400 light-years from Earth. It has an apparent magnitude that has varied from below +6 in historical times to a peak of +4.6 and now around +5.3 and is classified as a semiregular variable star of type SRd. It is undergoing strong mass loss as part of its rapid evolution and has recently passed partway through the yellow evolutionary void by ejecting around a solar mass of material in 20 years.[6]

A hot main sequence companion (B1V) was described in 1978 on the basis of a colour excess in the ultraviolet.

  1. ^ Cite error: The named reference Percy was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference xhip was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference DR3 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference zsoldos was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference lobel was invoked but never defined (see the help page).
  6. ^ a b c d e f Cite error: The named reference hr8752 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference ducati was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference yStai was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference b-j was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference anugu was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference klochkova2019 was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference van was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference fry was invoked but never defined (see the help page).

Rich TVX News Network Site

Rich TVX News Network Info

© MMXXIII Rich X Search. We shall prevail. All rights reserved. Rich X Search