Pi Arae

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Pi Arae
Location of π Arae (dot within red circle)
Observation data
ICRS
)
Constellation Ara
Right ascension 17h 38m 05.51512s[1]
Declination –54° 30′ 01.5643″[1]
Apparent magnitude (V) +5.25[2]
Characteristics
Spectral type A5 IV-V[3]
B−V color index +0.20[2]
Distance
70.4 ± 0.3 ly
(21.60 ± 0.09 pc)
Absolute magnitude (MV)+2.01[5]
Details
Myr
HR 6549, SAO 244896[9]
Database references
SIMBADdata

Pi Arae,

light years from the Sun. It is most likely moving closer to the Sun with a radial velocity of −3 km/s.[4]

The

Sun's luminosity from its photosphere at an effective temperature of about 8,215 K.[6]

Pi Arae displays an

AU from the host star. The outer disk is 77 K and orbits at a distance of about 117.3 AU. The small size of some of the dust grains indicate the inner disk may have formed relatively recently from collisions between orbiting planetesimals.[11]

Located 55 

arc minutes to the north of Pi Arae is the globular cluster NGC 6397.[12]

References

  1. ^
    S2CID 18759600
    .
  2. ^
    Bibcode:1966CoLPL...4...99J
    .
  3. ^
    Bibcode:1975mcts.book.....H
    .
  4. ^
    S2CID 119231169
    .
  5. ^
    S2CID 119257644
    .
  6. ^
    S2CID 33401607
    .
  7. ^
    S2CID 119219094
    , 10.
  8. ^
    S2CID 119286673
    .
  9. ^ "pi. Ara", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2017-09-26.
  10. S2CID 2360696
    .
  11. doi:10.1088/0004-637X/776/2/111
    , 111.
  12. ISBN 978-1139851541
    .

External links
Retrieved from "https://en.wikipedia.org/w/index.php?title=Pi_Arae&oldid=1141169461"