HD 87822

Last updated
HD 87822
Observation data
Epoch J2000       Equinox J2000
Constellation Leo Minor
AB
Right ascension 10h 08m 15.88717s [1]
Declination +31° 36 14.5875 [1]
Apparent magnitude  (V)6.240 [2] (6.90 + 7.20) [3]
C
Right ascension 10h 08m 16.16565s [4]
Declination +31° 35 47.1421 [4]
Apparent magnitude  (V)13.8 [5]
Characteristics
AB
Spectral type F4V [6]
U−B color index +0.01 [7]
B−V color index +0.445 [7]
C
Spectral type dMs1.5 [8]
Astrometry
AB
Radial velocity (Rv)−8.0 [2]  km/s
Proper motion (μ)RA: −80.47 [1]   mas/yr
Dec.: −92.07 [1]   mas/yr
Parallax (π)16.33 ± 0.42  mas [1]
Distance 200 ± 5  ly
(61 ± 2  pc)
Absolute magnitude  (MV)2.23 [2]
C
Radial velocity (Rv)−5.77 [4]  km/s
Proper motion (μ)RA: −80.484 [4]   mas/yr
Dec.: −87.851 [4]   mas/yr
Parallax (π)16.0212 ± 0.0186  mas [4]
Distance 203.6 ± 0.2  ly
(62.42 ± 0.07  pc)
Orbit [9]
PrimaryA
CompanionB
Period (P)17.765±0.036 yr
Semi-major axis (a)0.1560±0.0005
Eccentricity (e)0.3960±0.0038
Inclination (i)84.59±0.20°
Longitude of the node (Ω)349.57±0.15°
Periastron epoch (T)B 1989.133±0.042
Argument of periastron (ω)
(secondary)
7.73±0.95°
Details
A
Mass 1.45 [10]   M
Surface gravity (log g)4.18 [6]   cgs
Temperature 6,533 [6]   K
Metallicity [Fe/H]0.10 [6]   dex
Rotational velocity (v sin i)8 [11]  km/s
Age 1.6 [2]   Gyr
B
Mass 1.38 [10]   M
C
Mass 0.53 [10]   M
Radius 0.53 [5]   R
Luminosity 0.04 [5]   L
Surface gravity (log g)4.71 [5]   cgs
Temperature 3,610 [5]   K
Metallicity [Fe/H]−0.31 [12]   dex
Other designations
BD+32°1982, HD 87822, HIP 49658, HR 3979, SAO 61882.
Database references
SIMBAD data

HD 87822 is a triple star in the northern constellation of Leo Minor. [10] The inner pair orbit each other with a period of about 18 years. [3]

Related Research Articles

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<span class="mw-page-title-main">UX Arietis</span> Trinary star system in the constellation Aries

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References

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