6 Sagittarii

6 Sagittarii
Observation data
Epoch J2000      Equinox J2000
Constellation Sagittarius
Right ascension 18h 01m 23.12190s[1]
Declination −17° 09′ 24.7302″[1]
Apparent magnitude (V) 6.27[2]
Characteristics
Spectral type K2 III[3]
B−V color index 1.763±0.010[4]
Astrometry
Radial velocity (Rv)−22.0±4.3[2] km/s
Proper motion (μ) RA: −0.86[1] mas/yr
Dec.: −7.15[1] mas/yr
Parallax (π)1.24 ± 0.44 mas[1]
Distanceapprox. 2,600 ly
(approx. 800 pc)
Details
Mass10.6±1.9[5] M☉
Luminosity6,816.79[6] L☉
Temperature3,778[6] K
Age25.1±3.8[5] Myr
Other designations
6 Sgr, BD−17° 4987, FK5 1470, HD 164358, HIP 88258, HR 6715, SAO 160998[7]
Database references
SIMBADdata

6 Sagittarii is a massive, orange-hued star in the southern zodiac constellation of Sagittarius. With an apparent visual magnitude of 6.27,[2] it is just below the nominal brightness limit for visibility with the typical naked eye under ideal viewing conditions. The distance can be estimated from the annual parallax shift of 1.24±0.44 mas[1] as roughly 2,600 light years away. It is moving closer to the Sun with a heliocentric radial velocity of −22 km/s.[2] 6 Sagittarii has a peculiar velocity of 31.8+9.9
−14.1 km/s, which may indicate it is a runaway star.[5]

This is an evolved giant star with a stellar classification of K2 III.[3] It is only 25[5] million years old and has around ten times the mass of the Sun.[5] The star is radiating about 6,817 times the Sun's luminosity from its photosphere at an effective temperature of 3,778 K.[6] It appears to be a source of extended infrared excess, but this emission may be due to intervening cirrus.[8]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1978 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ a b c d e Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference McDonald2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Plets1997 was invoked but never defined (see the help page).