Xi Puppis

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Template:Short description

ξ Puppis
Template:Location mark
Location of ξ Puppis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Puppis
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 3.35[2]
Characteristics
Spectral type G6 Iab-Ib[3]
U−B Template:Engvar +1.18[2]
B−V Template:Engvar +1.25[2]
Astrometry
Radial velocity (Rv)+2.7[4] km/s
Proper motion (μ) RA: −4.81[1] mas/yr
Dec.: −0.89[1] mas/yr
Parallax (π)2.72±0.21 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)–3.89[5]
Details
Mass9.9 ± 1.0[3] Template:Solar mass
Radius124[6] Template:Solar radius
LuminosityTemplate:Val[6] Template:Solar luminosity
Surface gravity (log g)Template:Val[3] cgs
TemperatureTemplate:Val,[6] 4,925[5] K
Metallicity [Fe/H]+0.13[5] dex
Rotational velocity (v sin i)9.2[7] km/s
Age23[3] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Azmidi, Azmidiske, Asmidiske, ξ Puppis, ξ Pup, Xi Pup, 7 Puppis, CCDM J07493-2452A; CPD−24  2939, FK5 1204, GC 10562, HD 63700, HIP 38170, HR 3045, IDS 07451-2437 A, PPM 253258, SAO 174601, WDS J07493-2452A.
Database references
SIMBADdata

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Xi Puppis (ξ Puppis, abbreviated Xi Pup, ξ Pup) is a multiple star system in the southern constellation of Puppis. With an apparent visual magnitude of 3.35,[2] it is one of the brighter members of this constellation. Based on parallax measurements made during the Hipparcos mission, it is located approximately Template:Convert from the Sun, with a 7.5% margin of error.[1]

The system consists of a spectroscopic binary, designated Xi Puppis A,[8] together with a third companion star, Xi Puppis B. A's two components are themselves designated Xi Puppis Aa (formally named Azmidi Template:IPAc-en)[9] and Ab.

Nomenclature

ξ Puppis (Latinised to Xi Puppis) is the system's Bayer designation. The designations of the two constituents as Xi Puppis A and B, and those of A's components - Xi Puppis Aa and Ab - derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).[10]

The system was sometimes known as Asmidiske (Azmidiske), a misspelling and misplacement of Aspidiske (from the Greek for 'little shield), the traditional name of Iota Carinae.[11] In 2016, the IAU organized a Working Group on Star Names (WGSN)[12] to catalog and standardize proper names for stars. The WGSN decided to attribute proper names to individual stars rather than entire multiple systems.[13] It approved the name Azmidi for the component Xi Puppis Aa on 1 June 2018 and it is now so included in the List of IAU-approved Star Names.[9]

Properties

Because of the distance of this system from the Earth, its visual magnitude is reduced by 0.73 as a result of extinction from the intervening gas and dust.[14]

Xi Puppis A presents as a yellow supergiant of spectral class G6 with a luminosity 8,300 times that of the Sun.[11]

The 13th-magnitude companion, Xi Puppis B, is about 5 arcseconds distant and is a Sun-like star that orbits at least 2000 AU away with an orbital period of at least 26,000 years.[11]

References

Template:Reflist

External links

Template:Stars of Puppis

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  3. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named mnras402_2_1369
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  6. ↑ a b c Cite error: Invalid <ref> tag; no text was provided for refs named tycho-gaia
  7. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named vsini
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  13. ↑ Script error: No such module "citation/CS1".
  14. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named apj256_177
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