Xi Aquilae

ξ Aquilae / Libertas
Location of ξ Aquilae (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Aquila
Right ascension 19h 54m 14.8815s[1]
Declination +08° 27′ 41.235″[1]
Apparent magnitude (V) 4.722[2]
Characteristics
Spectral type G9.5 IIIb[3]
U−B color index +0.89[4]
B−V color index +1.049[5]
R−I color index 0.57
Astrometry
Radial velocity (Rv)−42.10 ± 0.14[5] km/s
Proper motion (μ) RA: 101.694(107) mas/yr[1]
Dec.: −81.141(77) mas/yr[1]
Parallax (π)17.5183 ± 0.1006 mas[1]
Distance186 ± 1 ly
(57.1 ± 0.3 pc)
Absolute magnitude (MV)+0.96[6]
Details
Mass1.74+0.21
−0.28[7] M☉
Radius10.03±0.22[8]
10.86+0.44
−1.05[7] R☉
Luminosity58.54+6.02
−12.37[7] L☉
Surface gravity (log g)2.61±0.08[7] cgs
Temperature4,841[7] K
Metallicity [Fe/H]−0.11+0.06
−0.1[7] dex
Rotational velocity (v sin i)5.2[5] km/s
Age980±180[8] Myr
Other designations
Libertas, BD+08 4261, 59 Aquilae, HD 188310, HIP 97938, HR 7595, SAO 125210[9]
Database references
SIMBADdata

Xi Aquilae (ξ Aquilae, abbreviated Xi Aql, ξ Aql), officially named Libertas /ˈlɪbərtæs/,[10] is a red-clump giant star located at a distance of 186 light-years (57 parsecs) from the Sun in the equatorial constellation of Aquila. As of 2008, an extrasolar planet (designated Xi Aquilae b, later named Fortitudo) has been confirmed in orbit around the star.[11]

  1. ^ a b c d Cite error: The named reference Gaia DR3 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference aaa515_A11 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference perkins was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference clpl4_99 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference aj135_1_209 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c d e f Cite error: The named reference Teng2023 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference baines2018 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ "IAU Catalog of Star Names". Retrieved 28 July 2016.
  11. ^ Cite error: The named reference paspj60_3_539 was invoked but never defined (see the help page).