HD 49976

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Template:Short description

HD 49976
File:V592MonLightCurve.png
A light curve for V592 Monocerotis, plotted from TESS data[1]
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Monoceros
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 6.16 to 6.32[3]
Characteristics
Spectral type A2p Sr Cr Eu[4] or B9V[5]
U−B Template:Engvar +0.02[6]
B−V Template:Engvar +0.00[6]
Variable type α2 CVn[3]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[7] km/s
Proper motion (μ) RA: −9.794[2] mas/yr
Dec.: +2.720[2] mas/yr
Parallax (π)9.6666±0.0529 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)+1.13[8]
Details[8]
MassScript error: No such module "val". Template:Solar mass
RadiusScript error: No such module "val". Template:Solar radius
Luminosity32 Template:Solar luminosity
Surface gravity (log g)Script error: No such module "val". cgs
Temperature9,016 K
Rotation2.976 days
Rotational velocity (v sin i)31[9] km/s
Age209[10] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[11]
Database references
SIMBADdata

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HD 49976 is a variable star in the constellation of Monoceros (the Unicorn). It has the variable star designation V592 Monocerotis, while HD 49976 is the identifier from the Henry Draper Catalogue.[11] It has a white hue and is near the lower limit of visibility to the naked eye, having an apparent visual magnitude that fluctuates from 6.16 down to 6.32 with a 2.976 day period.[3] Based upon parallax measurements, it is located at a distance of approximately 337 light years from the Sun.[2] The star is drifting further away with a radial velocity of +19 km/s.[7]

This is a magnetic chemically peculiar star with a stellar classification of A2p Sr Cr Eu,[4] showing excesses in strontium and the rare earth elements in the photosphere, among others. Houk and Swift (1999) assigned it a class of B9V, matching a B-type main sequence star.[5] It is an Alpha2 Canum Venaticorum variable;[3] the magnetic field is complex; not corresponding to a simple dipole.[12]

HD 49976 is an estimated 209[10] million years old and is spinning with a period of 2.976 days.[8] The star has 2.2 times the mass of the Sun and 2.3 times the Sun's radius. It is radiating 32 times the luminosity of the Sun from its photosphere at an effective temperature of 9,016 K.[8]

References

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

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Template:Stars of Monoceros

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