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HD 200964 information


HD 200964
Observation data
Epoch J2000      Equinox J2000
Constellation Equuleus[1]
Right ascension 21h 06m 39.842s[2]
Declination +03° 48′ 11.23″[2]
Apparent magnitude (V) +6.48[1]
Characteristics
Spectral type G8 IV[3]
B−V color index 0.880±0.009[1]
Astrometry
Radial velocity (Rv)−72.63±0.03[4] km/s
Proper motion (μ) RA: 94.748 mas/yr[2]
Dec.: 50.418 mas/yr[2]
Parallax (π)13.7656 ± 0.0275 mas[2]
Distance236.9 ± 0.5 ly
(72.6 ± 0.1 pc)
Absolute magnitude (MV)2.19[1]
Details
Mass1.44±0.09[5] M
Radius4.30±0.09[5] R
Luminosity13.758±0.064[6] L
Surface gravity (log g)3.6±0.1[5] cgs
Temperature5,164±44[5] K
Metallicity [Fe/H]−0.15±0.04[5] dex
Rotational velocity (v sin i)2.28±0.5[5] km/s
Age3.0±0.6[5] Gyr
Other designations
10 G. Equ, BD+03°4501, HD 200964, HIP 104202, SAO 126546[7]
Database references
SIMBADdata

HD 200964 is a star with a pair of orbiting exoplanets[5] located in the northern constellation of Equuleus.[1] It has an apparent visual magnitude of +6.48,[1] which puts it at the lower limit of visibility to the naked eye, but binoculars would make it easy to see. Based on parallax measurements, the distance to this system is 238 light years, but it is drifting closer with a heliocentric radial velocity of −72.6 km/s.[4]

This is a G-type subgiant star[5] with a stellar classification of G8 IV.[3] It is a 3.3 billion year old star that has exhausted the supply of hydrogen at its core and has begun to evolve away from the main sequence, where it was an A-type star.[5] The star has 44% more mass than the Sun and is spinning with a projected rotational velocity of 2.3 km/s. The abundance of iron, an indicator of the star's metallicity, is lower than in the Sun. The star has swelled to 4.3 times the radius of the Sun and it is radiating nearly 14 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,164 K.[5]

  1. ^ a b c d e f Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk_Swift_1999 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Soubiran_et_al_2018 was invoked but never defined (see the help page).
  5. ^ a b c d e f g h i j k Cite error: The named reference Johnson2011 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Johns_et_al_2018 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Simbad was invoked but never defined (see the help page).

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HD 200964

Last Update:

HD 200964 is a star with a pair of orbiting exoplanets located in the northern constellation of Equuleus. It has an apparent visual magnitude of +6.48...

Word Count : 794

List of exoplanets discovered in 2010

Last Update:

4961 HD 181342 b 2.54 564.1 1.592 radial vel. 394.04 1.69 4945 Proper name Dopere HD 200964 b 1.599 606.3 1.565 radial vel. 237.25 1.39 4982 HD 200964 c...

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List of stars in Equuleus

Last Update:

Hipparcos and Tycho Catalogues". Retrieved 2006-12-26. Kostjuk, N. D. (2002). "HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index". Retrieved 2006-12-26. Roman, N...

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List of exoplanets detected by radial velocity

Last Update:

most massive exoplanet candidate is HD 217786 b, which masses 12.98 MJ; the least massive confirmed planet is HD 10180 b, which masses 0.004 MJ or 3.1...

Word Count : 286

Beta Equulei

Last Update:

α (Kitalpha) β γ δ ε ζ λ Flamsteed 4 6 9 Variable R U SY HR 8038 8067 8090 8095 8149 8191 HD 200779 200964 201585 202908 203473 Other HAT-P-65 WASP-90...

Word Count : 550

2 Equulei

Last Update:

α (Kitalpha) β γ δ ε ζ λ Flamsteed 4 6 9 Variable R U SY HR 8038 8067 8090 8095 8149 8191 HD 200779 200964 201585 202908 203473 Other HAT-P-65 WASP-90...

Word Count : 550

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