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HD 208177

Double star system in the constellation Aquarius From Wikipedia, the free encyclopedia

HD 208177 is a binary star system in the equatorial constellation of Aquarius. They are faintly visible to the naked eye with an apparent magnitude of 6.20.[3] The pair have an angular separation of 144″ and the companion is of 15th magnitude.[9]

ConstellationAquarius[1]
Right ascension21h 54m 35.915s[2]
Declination−03° 18′ 04.58″[2]
Apparentmagnitude(V)6.20[3]
Quick facts Constellation, Right ascension ...
HD 208177
Observation data
Epoch J2000      Equinox ICRS
Constellation Aquarius[1]
HD 208177
Right ascension 21h 54m 35.915s[2]
Declination −03° 18′ 04.58″[2]
Apparent magnitude (V) 6.20[3]
companion
Right ascension 21h 54m 45.312s[4]
Declination −03° 18′ 34.35″[4]
Apparent magnitude (V) 15.16[5]
Characteristics
HD 208177
Evolutionary stage main sequence[2]
Spectral type F6/7V[6]
U−B color index 0.07[3]
B−V color index 0.48[3]
companion
Evolutionary stage main sequence[7]
Spectral type M3.5V[7]
Astrometry
HD 208177
Radial velocity (Rv)−20[8] km/s
Proper motion (μ) RA: +26.272[2] mas/yr
Dec.: −33.683[2] mas/yr
Parallax (π)13.7652±0.0717 mas[2]
Distance237 ± 1 ly
(72.6 ± 0.4 pc)
Absolute magnitude (MV)+2.05[1]
companion
Radial velocity (Rv)−14.33±2.85[4] km/s
Proper motion (μ) RA: +27.675[4] mas/yr
Dec.: −33.708[4] mas/yr
Parallax (π)13.7048±0.0269 mas[4]
Distance238.0 ± 0.5 ly
(73.0 ± 0.1 pc)
Details
HD 208177
Mass1.63[9] M☉
Radius2.87[10] R☉
Luminosity14[10] L☉
Surface gravity (log g)3.66[10] cgs
Temperature6,577[10] K
Metallicity [Fe/H]0.30[11] dex
Rotational velocity (v sin i)80[12] km/s
Age1.70[11] Gyr
companion
Mass0.32[9] M☉
Radius0.40[10] R☉
Luminosity0.018[10] L☉
Surface gravity (log g)4.83[10] cgs
Temperature3,341[10] K
Other designations
BD−03°5329, HD 208177, HIP 108144, HR 8363, SAO 145735
companion: Gaia DR3 2670423305295264256
Database references
SIMBADdata
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)
Close

The primary component is a main-sequence star with a stellar classification of F6/7V.[6] It has an estimated 163%[9] of the Sun's mass and is about 1.7 billion years old[11] The companion is only 0.32 M☉.[9]

References

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