Delta Sagittarii

Delta Sagittarii
	Location of δ Sagittarii (circled)
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Sagittarius
Right ascension	18h 20m 59.64354s
Declination	−29° 49′ 41.1659″
Apparent magnitude (V)	+2.70
Characteristics
Spectral type	K3 III
U−B color index	+1.55
B−V color index	+1.38
Astrometry
Radial velocity (Rv)	–19.9 km/s
Proper motion (μ)	RA: +32.54 mas/yr ; Dec.: −25.57 mas/yr
Parallax (π)	9.38 ± 0.18 mas
Distance	348 ± 7 ly ; (107 ± 2 pc)
Absolute magnitude (MV)	−1.99
Details
δ Sgr A
Mass	3.21 M☉
Radius	76.83 R☉
Luminosity	1,660 L☉
Surface gravity (log g)	0.30 cgs
Temperature	4,203±69 K
Metallicity [Fe/H]	−0.32 dex
Rotational velocity (v sin i)	3.6 km/s
Age	260 Myr
Other designations
	Kaus Media, Kaus Meridionalis, Media, δ Sgr, CPD−30°5513, FK5 687, GC 25024, HD 168454, HIP 89931, HR 6859, SAO 186681, PPM 268275, CCDM J18210-2950A, WDS J18210-2950A
Database references
SIMBAD	Delta Sagittarii

Delta Sagittarii (δ Sagittarii, abbreviated Delta Sgr, δ Sgr), formally named Kaus Media /ˌkɔːs ˈmiːdiə/,^[10]^[11] is a star in the southern zodiac constellation of Sagittarius. The apparent visual magnitude of this star is +2.70,^[2] making it easily visible to the naked eye. Parallax measurements place the distance at roughly 348 light-years (107 parsecs) from the Sun.^[1]

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Observation data Epoch J2000.0 Equinox J2000.0
Location of δ Sagittarii (circled)
Constellation	Sagittarius
Right ascension	18^h 20^m 59.64354^s^[1]
Declination	−29° 49′ 41.1659″^[1]
Apparent magnitude (V)	+2.70^[2]
Characteristics
Spectral type	K3 III^[3]
U−B color index	+1.55^[2]
B−V color index	+1.38^[2]
Astrometry

Radial velocity (R_v)	–19.9^[4] km/s
Proper motion (μ)	RA: +32.54^[1] mas/yr Dec.: −25.57^[1] mas/yr
Parallax (π)	9.38 ± 0.18 mas^[1]
Distance	348 ± 7 ly (107 ± 2 pc)
Absolute magnitude (M_V)	−1.99^[5]

Details
δ Sgr A
Mass	3.21^[6] `M`_☉
Radius	76.83^[6]^[a] `R`_☉
Luminosity	1,660^[6] `L`_☉
Surface gravity (log g)	0.30^[7] cgs
Temperature	4,203±69^[6] K
Metallicity [Fe/H]	−0.32^[7] dex
Rotational velocity (v sin i)	3.6^[8] km/s
Age	260^[6] Myr

Other designations
Kaus Media, Kaus Meridionalis, Media, δ Sgr, CPD−30°5513, FK5 687, GC 25024, HD 168454, HIP 89931, HR 6859, SAO 186681, PPM 268275, CCDM J18210-2950A, WDS J18210-2950A^[9]
Database references
SIMBAD	Delta Sagittarii

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Delta Sagittarii

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