HR 9038

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Template:Short description

HR 9038 AB
Observation data
Epoch J2000      Equinox J2000
Constellation Cepheus
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 6.40[2] (6.93 / 7.33)[3] / 11.4[4]
Characteristics
Spectral type K3 V[5] + K3 V[5] + M2[6]
U−B Template:Engvar 0.70[2]
B−V Template:Engvar 0.98[2]
R−I Template:Engvar 0.5
Astrometry
Radial velocity (Rv)+4.60[7] km/s
Proper motion (μ) RA: 341.01[1] mas/yr
Dec.: 41.50[1] mas/yr
Parallax (π)91.82±0.30 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)6.77 / 7.16 / ?[3]
Absolute bolometric
magnitude (Mbol)		6.34 / 6.62 / ?[3]
Orbit[8]
PrimaryHR 9038 A
CompanionHR 9038 B
Period (P)290.0 yr
Semi-major axis (a)4.14″
Eccentricity (e)0.55
Inclination (i)49.58°
Longitude of the node (Ω)93.91°
Periastron epoch (T)2015.0
Argument of periastron (ω)
(secondary)		134.14°
Orbit[5]
PrimaryHR 9038 Aa
CompanionHR 9038 Ab
Period (P)7.7531 d
Eccentricity (e)0.0
Inclination (i)~60[3]°
Periastron epoch (T)2420001.264
Argument of periastron (ω)
(secondary)		0.0°
Semi-amplitude (K1)
(primary)		39.9 km/s
Semi-amplitude (K2)
(secondary)		49.7 km/s
Details[3]
HR 9038 Aa
Mass0.70 Template:Solar mass
Radius0.69 Template:Solar radius
Surface gravity (log g)4.60 cgs
Temperature4820 K
Metallicity [Fe/H]-0.29 dex
HR 9038 Ab
Mass0.67 Template:Solar mass
Radius0.66 Template:Solar radius
Surface gravity (log g)4.62 cgs
Temperature4620 K
Metallicity [Fe/H]-0.29 dex
Other designations
BD+74° 1047, GJ 909, WDS J23524+7533
HR 9038 A: HD 223778, HIP 117712, HR 9038, SAO 10879
Database references
SIMBADA
B

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HR 9038 is a triple star system located thirty-five light-years away, in the constellation Cepheus. Component A is a spectroscopic binary system with an orbital period of 7.753 days and a combined stellar classification of K3 V.[9] Component B is a red dwarf star that orbits the primary pair every 290 years.[4]

References

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External links

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  • NStars: 2352+7532Script error: No such module "Unsubst".

Template:Stars of Cepheus


Template:Reddwarf-star-stub Template:Asbox Template:Asbox

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