HD 37017

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Template:Short description

HD 37017
File:V1046OriLightCurve.png
A light curve for V1046 Orionis, plotted from TESS data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Orion
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 6.553[3]
Characteristics
Evolutionary stage B2/3V[4] (B1.5 Vp He strong[5])
U−B Template:Engvar −0.79[6]
B−V Template:Engvar −0.14[6]
Variable type SX Ari[7]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[8] km/s
Proper motion (μ) RA: Script error: No such module "val".[9] mas/yr
Dec.: Script error: No such module "val".[9] mas/yr
Parallax (π)2.643±0.075 mas[9]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Orbit[10]
Period (P)Script error: No such module "val".
Semi-major axis (a)Script error: No such module "val".
Eccentricity (e)Script error: No such module "val".
Periastron epoch (T)Script error: No such module "val".
Argument of periastron (ω)
(secondary)		Script error: No such module "val".°
Semi-amplitude (K1)
(primary)		Script error: No such module "val". km/s
Details
A
MassScript error: No such module "val".[3] Template:Solar mass
Luminosity3,754[3] Template:Solar luminosity
Temperature23,700[3] K
Rotation0.901 d[11]
Rotational velocity (v sin i)165[5] km/s
B
Mass4.5[10] Template:Solar mass
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[12]
Database references
SIMBADdata

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HD 37017 is a binary star system in the equatorial constellation of Orion. It has the variable star designation V1046 Orionis; HD 37017 is the identifier from the Henry Draper Catalogue. The system is a challenge to view with the naked eye, being close to the lower limit of visibility with a combined apparent visual magnitude of 6.55.[3] It is located at a distance of approximately 1,230 light years based on parallax,[9] and is drifting further away with a radial velocity of +32 km/s.[8] The system is part of star cluster NGC 1981.[13]

The binary nature of this system was suggested by A. Blaauw and T. S. van Albada in 1963.[10] It is a double-lined[11] spectroscopic binary with an orbital period of 18.6556 days and an eccentricity of 0.31.[14] The eccentricity is considered unusually large for such a close system.[11] It forms a suspected eclipsing binary that ranges in brightness from 6.54 down to 6.58.[7]

The primary is a helium-strong, magnetic chemically peculiar star[15] with a stellar classification of B1.5 Vp.[5] It has a magnetic field strength of Script error: No such module "val".,[16] and the helium concentrations are located at the magnetic poles.[17] V1046 Orionis was found to be a variable star by L. A. Balona in 1997,[11] and is now classified as an SX Arietis variable.[7] The star undergoes periodic changes in visual brightness, magnetic field strength, and spectral characteristics with a cycle time of 0.901175 days – the star's presumed rotation period.[11] Radio emission has been detected that varies with the rotation period.[17]

The secondary component has an estimated 4.5 times the mass of the Sun. The class has been estimated as type B6III-IV.[11]

References

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  1. ↑ Script error: No such module "citation/CS1".
  2. ↑ a b Template:Cite Gaia DR2
  3. ↑ a b c d e Script error: No such module "citation/CS1".
  4. ↑ Script error: No such module "Citation/CS1".
  5. ↑ a b c Script error: No such module "citation/CS1".
  6. ↑ a b Script error: No such module "citation/CS1".
  7. ↑ a b c Script error: No such module "citation/CS1".
  8. ↑ a b Script error: No such module "citation/CS1".
  9. ↑ a b c d Script error: No such module "citation/CS1".
  10. ↑ a b c Script error: No such module "citation/CS1".
  11. ↑ a b c d e f Script error: No such module "citation/CS1".
  12. ↑ Template:Cite simbad
  13. ↑ Script error: No such module "citation/CS1".
  14. ↑ Script error: No such module "citation/CS1".
  15. ↑ Script error: No such module "citation/CS1".
  16. ↑ Script error: No such module "citation/CS1".
  17. ↑ a b Script error: No such module "citation/CS1".

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External links

Template:Stars of Orion

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