Gamma Hydrae

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γ Hydrae
Location of γ Hydrae (circled)
Observation data
J2000.0
Constellation Hydra
Right ascension 13h 18m 55.29719s[1]
Declination –23° 10′ 17.4514″[1]
Apparent magnitude (V) +2.993[2]
Characteristics
Spectral type G8 III[3]
U−B color index +0.645[2]
B−V color index +0.920[2]
Distance
133.8 ± 0.8 ly
(41.0 ± 0.3 pc)
Absolute magnitude (MV)–0.15[3]
Details
Myr
HR 5020, NSV 6180, SAO 181543.[8]
Database references
SIMBADdata

Gamma Hydrae (γ Hya, γ Hydrae) is a

apparent visual magnitude of 3.0,[2] placing it second in brightness among the members of this generally faint constellation. Based upon parallax measurements made during the Hipparcos mission, this star is at a distance of around 133.8 light-years (41.0 parsecs) from Earth.[1]

The

K-type star.[9] Despite having reached an advanced stage in its evolution, it is considerably younger than the Sun with an age of around 372 million years. This is because higher mass stars consume their nuclear fuel at a more rapid rate.[3]

In culture

γ Hya appears on the flag of Brazil, symbolising the state of Acre.[10]

References

  1. ^
    S2CID 18759600
  2. ^
    Bibcode:1966PDAUC...1....1G
  3. ^
    doi:10.1093/pasj/60.4.781
  4. Bibcode:1999VeARI..35....1W
  5. ^
    S2CID 16778588
    , A88.
  6. ^
    S2CID 119428437
  7. Bibcode:1970CoAsi.239....1B
  8. ^ "gam Hya". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-02-23.
  9. Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original
    on 2012-03-18, retrieved 2012-01-16
  10. ^ Astronomy of the Brazilian Flag, FOTW Flags Of The World website
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