Nu Capricorni

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Template:Short description

Nu Capricorni
Template:Location mark
Location of ν Capricorni (circled), to the ESE of the naked eye double, α Capricorni
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Capricornus
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) +4.76[2]
Characteristics
Spectral type B9 IV[3] or B9.5 V[4]
U−B Template:Engvar −0.11[2]
B−V Template:Engvar −0.04[2]
Astrometry
Radial velocity (Rv)−1.00[5] km/s
Proper motion (μ) RA: +14.74[1] mas/yr
Dec.: −14.32[1] mas/yr
Parallax (π)12.88±0.27 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)+0.32[6]
Details
Mass2.37[7] Template:Solar mass
RadiusScript error: No such module "val".[8] Template:Solar radius
LuminosityScript error: No such module "val".[8] 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".[6] dex
Rotational velocity (v sin i)24[9] km/s
Age115[7] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[10]
Database references
SIMBADdata

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Nu Capricorni or ν Capricorni, formally named Alshat Template:IPAc-en,[11] is a star in the southern constellation of Capricornus. It is visible to the naked eye with an apparent visual magnitude of +4.76.[2]

Characteristics

Nu Capricorni is 6.6 degrees north of the ecliptic and so is within the margin of occultations of few if any planets but is well within that of the Moon.[12] The celestial latitude of either of the Alpha Capricorni main stars is about 6.93 degrees by comparison.[13]

The star is a blue-white hued B-type main-sequence or subgiant star with an apparent magnitude of +4.77. It is calculated to be a distance of 253 light-years from the Sun based on parallax.

It has an optical companion, named Nu Capricorni B, a magnitude 11.8 star at an angular separation of 54.1 arcseconds from the primary.[4] Gaia Data Release 2 shows the companion to be much further away from Earth, forming a binary system only in the line-of-sight.[14]

Nomenclature

ν Capricorni, Latinised to Nu Capricorni, is the system's Bayer designation.

The star bore the traditional name Alshat, from the Arabic الشاة aš-šā[t], meaning 'the sheep' that was to be slaughtered by the adjacent Beta¹ Capricorni (Dabih).[15] In 2016, the IAU organized a Working Group on Star Names (WGSN)[16] to catalog and standardize proper names for stars. It approved the name Alshat on 30 June 2017 and it is now so included in the List of IAU-approved Star Names.[11]

References

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  1. ↑ a b c d e Script error: No such module "citation/CS1".
  2. ↑ a b c d Script error: No such module "citation/CS1".
  3. ↑ 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 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. ↑ Template:Cite simbad
  11. ↑ a b Script error: No such module "citation/CS1".
  12. ↑ Script error: No such module "citation/CS1".
  13. ↑ Script error: No such module "citation/CS1".
  14. ↑ Template:Cite DR2
  15. ↑ Script error: No such module "citation/CS1".
  16. ↑ Script error: No such module "citation/CS1".

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Template:Stars of Capricornus

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