Epsilon Crucis

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ε Crucis
Location of ε Crucis (circled)
Observation data
J2000.0
Constellation Crux
Right ascension 12h 21m 21.60936s[1]
Declination −60° 24′ 04.1291″[1]
Apparent magnitude (V) 3.58[2]
Characteristics
Spectral type K3 III[3]
U−B color index +1.63[2]
B−V color index +1.42[2]
Variable type suspected[4]
Distance
230 ± 3 ly
(70.5 ± 0.8 pc)
Absolute magnitude (MV)−0.63±0.09[6]
Details
Gyr
HR 4700, SAO 251862[7]
Database references
SIMBADdata

Epsilon Crucis, ε Crucis (abbreviated Eps Cru, ε Cru), also known as Ginan

apparent visual magnitude of 3.58.[2] It is moving closer to the Sun with a radial velocity of −4.60 km/s.[5]

This is a

Sun's luminosity from its enlarged photosphere at an effective temperature of 4,294 K.[5]

Nomenclature

ε Crucis (Latinised to Epsilon Crucis) is the star's Bayer designation.

The system bore the traditional name Ginan in the culture of the

dilly bag - the "Bag of Songs."[11] In 2016, the IAU organized a Working Group on Star Names (WGSN)[12] to catalog and standardize proper names for stars. The WGSN approved the name Ginan for Epsilon Crucis on 19 November 2017 and it is now so included in the List of IAU-approved Star Names.[8]

It was also sometimes called Intrometida (intrusive) in Portuguese.[13]

In culture

Ginan is represented on the national flags of Australia, Papua New Guinea and Samoa. It is also featured in the flag of Brazil, along with 26 other stars, each of which represents a state. It represents the State of Espírito Santo.[14]

Left: The bright blue star on the right centre of this image is Epsilon Crucis. The colours used in this image represent specific wavelengths of infrared light. Blue represents light emitted at 3.4 and 4.6 micrometres. Right: Crux (Southern Cross) from Hobart, Tasmania.

References

  1. ^
    S2CID 18759600
    .
  2. ^
    Bibcode:1986EgUBV........0M
    .
  3. ^
    doi:10.1086/191373
    .
  4. Bibcode:2009yCat....102025S
    .
  5. ^
    S2CID 53666931
    .
  6. S2CID 9341088
  7. ^ "eps Cru". SIMBAD. Centre de données astronomiques de Strasbourg.
  8. ^ a b "Naming Stars". IAU.org. Retrieved 16 December 2017.
  9. S2CID 14878976
    .
  10. ^ "IAU Approves 86 New Star Names From Around the World" (Press release). IAU.org. 11 December 2017.
  11. ^ "IAU Working Group on Star Names (WGSN)" (Press release). IAU.org.
  12. ^ "IAU Working Group on Star Names (WGSN)". Retrieved 22 May 2016.
  13. ^ da Silva Oliveira, R., "Crux Australis: o Cruzeiro do Sul" Archived 2013-12-06 at the Wayback Machine, Artigos: Planetario Movel Inflavel AsterDomus.
  14. ^ "Astronomy of the Brazilian Flag". FOTW Flags Of The World website.
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