Lambda Chamaeleontis

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Lambda Chamaeleontis
Observation data
J2000
Constellation
Musca
Right ascension 12h 07m 49.87515s[1]
Declination −75° 22′ 01.2583″[1]
Apparent magnitude (V) 5.165[2]
Characteristics
Spectral type K2II/III[3]
U−B color index +1.37[4]
B−V color index +1.30[4]
Distance
472 ± 6 ly
(145 ± 2 pc)
Absolute magnitude (MV)−0.40[6]
Details
Radius30.21+1.30
−4.03[1] R☉
Luminosity286.8+4.7
−13.3[1] L☉
Temperature4322+320
−90[1] K
HR 4617, SAO 256905[7]
Database references
SIMBADdata

Lambda Chamaeleontis,

apparent visual magnitude of 5.165.[2] It is located 472 light-years (145 parsecs) from the Sun, based on its parallax,[1] but is drifting closer with a radial velocity of −45 km/s.[5]

This is an aging

Sun's luminosity from its enlarged photosphere at an effective temperature of 4,322 K.[1]

The star was first designated Lambda Chamaeleontis by French astronomer

Lacaille, in his Coelum Australe Stelliferum. He listed it close to Pi Chamaeleontis in both brightness and location. The IAU redefinition of the constellation borders in 1930, has placed Lambda Chamaeleontis slightly over the border in Musca, rather than Chamaeleon.[8]

References

  1. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  2. ^
    Bibcode:2000A&A...355L..27H
    .
  3. ^
    Bibcode:1975mcts.book.....H
    .
  4. ^
    Bibcode:1966CoLPL...4...99J
    .
  5. ^
    S2CID 119231169
    .
  6. S2CID 119257644
    .
  7. ^ "HD 105340". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-08-27.{{cite web}}: CS1 maint: postscript (link)
  8. ^ "Musca Constellation". Constellation Guide; Constellations: A Guide to the Night Sky. Retrieved 25 January 2018.

Further reading

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