Xi2 Sagittarii

Xi2 Sagittarii
Location of ξ2 Sagittarii (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Sagittarius
Right ascension 18h 57m 43.79908s
Declination −21° 06′ 23.9613″
Apparent magnitude (V) +3.51
Characteristics
Spectral type G8/K0 II/III
U−B color index +1.13
B−V color index +1.18
Astrometry
Radial velocity (Rv)−20.10 km/s
Proper motion (μ) RA: +31.72 mas/yr
Dec.: −13.33 mas/yr
Parallax (π)8.93 ± 0.53 mas
Distance370 ± 20 ly
(112 ± 7 pc)
Absolute magnitude (MV)−1.72
Details
Mass3.36 M
Radius14 R
Luminosity676 L
Surface gravity (log g)2.23 cgs
Temperature4,541±64 K
Metallicity [Fe/H]−0.19 dex
Age380 Myr
Other designations
ξ2 Sgr, 37 Sgr, BD−21° 5201, FK5 710, HD 175775, HIP 93085, HR 7150, SAO 187504
Database references
SIMBADdata

Xi2 Sagittarii, Latinized from ξ2 Sagittarii, is a star in the zodiac constellation of Sagittarius. Data collected during the Hipparcos mission suggests it is an astrometric binary, although nothing is known about the companion. It is visible to the naked eye with a combined apparent visual magnitude of +3.51. Based upon an annual parallax shift of 8.93 mas as seen from Earth, this system is located around 370 light years from the Sun.

The spectrum of Xi2 Sagittarii yields a mixed stellar classification of G8/K0 II/III, showing traits of a G- or K-type giant or bright giant star. It has an estimated 3.36 times the mass of the Sun and about 14 times the Sun's radius. At an age of around 380 million years, it is radiating 676 times the Sun's luminosity from its photosphere at an effective temperature of 4,541 K.


This page was last updated at 2024-03-07 11:36 UTC. Update now. View original page.

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