Upsilon Serpentis

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Template:Short description

Upsilon Serpentis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Serpens[1]
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) +5.70[3]
Characteristics
Spectral type A3 V[4]
U−B Template:Engvar +0.09[3]
B−V Template:Engvar +0.10[3]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[5] km/s
Proper motion (μ) RA: −55.49[2] mas/yr
Dec.: +32.42[2] mas/yr
Parallax (π)13.04±0.84 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)+1.30[1]
Details
MassScript error: No such module "val".[6] Template:Solar mass
Radius2.2[7] Template:Solar radius
Luminosity23[8] Template:Solar luminosity
Surface gravity (log g)Script error: No such module "val".[6] cgs
TemperatureScript error: No such module "val".[6] K
Rotational velocity (v sin i)133[9] km/s
AgeScript error: No such module "val".[6] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[10]
Database references
SIMBADdata

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Upsilon Serpentis, Latinized from υ Serpentis, is a star in the Serpens Caput section of the constellation Serpens. Based upon an annual parallax shift of 13.04 mas as seen from Earth, it is located around 250 light years from the Sun. The star is bright enough to be faintly visible to the naked eye, having an apparent visual magnitude of +5.70.[3] It is a member of the Hyades group, a stream of stars that share a similar trajectory to the Hyades cluster.[11]

This is an A-type main sequence star with a stellar classification of A3 V.[4] It has an estimated 2.9 times the mass of the Sun[6] and around 2.2 times the Sun's radius.[7] With an age of 403 million years,[6] it has a high rate of spin with a projected rotational velocity of 133 km/s.[9] It is radiating 23 times the solar luminosity[8] from its photosphere at an effective temperature of 8,917 K.[6]

Upsilon Serpentis is a suspected astrometric binary,[12] which means an undetected companion is perturbing the motion of the visible star. An X-ray emission has been detected from this system with a luminosity of Script error: No such module "val".. This may be coming from the companion, since A-type stars are not expected to emit X-rays.[13]

References

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

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Template:Stars of Serpens

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