38 Cancri

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Template:Short description

38 Cancri
File:BTCncLightCurve.png
A visual band light curve for BT Cancri, plotted from data published by Gupta (1979)[1]
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cancer
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 6.65[3]
Characteristics
Evolutionary stage subgiant
Spectral type F0 IV[4]
B−V Template:Engvar Script error: No such module "val".[3]
Variable type δ Sct[5]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[6] km/s
Proper motion (μ) RA: −36.879[2] mas/yr
Dec.: −13.103[2] mas/yr
Parallax (π)5.3700±0.0705 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)0.36[3]
Details
Mass1.786[7] Template:Solar mass
Radius1.834[7] Template:Solar radius
Luminosity59.31[3] Template:Solar luminosity
Surface gravity (log g)Script error: No such module "val".[8] cgs
TemperatureScript error: No such module "val".[8] K
Metallicity [Fe/H]Script error: No such module "val".[8] dex
Rotation0.670 d[7]
Rotational velocity (v sin i)138.5[7] km/s
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[9]
Database references
SIMBADdata

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38 Cancri is a variable star in the zodiac constellation Cancer, located around 607 light years from the Sun. This object has the variable star designation BT Cancri; 38 Cancri is the Flamsteed designation. It is a member of the Praesepe cluster[10] but is a challenge to view with the naked eye, having an apparent visual magnitude of 6.65.[3] The star is moving closer to the Earth with a heliocentric radial velocity of +32 km/s.[6]

This is an evolving subgiant star with a stellar classification of F0 IV.[4] It was found to be a pulsating variable by Michel Breger in 1970[11] and is classed as a Delta Scuti variable. The star displays a pattern of variation showing up to 22 different frequencies, with three being dominant.[12] The brightness varies by up to 0.07 in magnitude.[5] The star has a magnetic field with a computed longitudinal field strength of Script error: No such module "val"..[8] It has 1.8[7] times the mass of the Sun and 1.8[7] times the Sun's radius. The star is radiating 59[3] times the Sun's luminosity from its photosphere at an effective temperature of around 7,300 K.[8]

References

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

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Template:Stars of Cancer

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