Epsilon Sagittae (HIP 96516)

Epsilon Sagittae is a yellow giant star in the constellation Sagitta. At 478 light years away, it shines at an apparent visual magnitude of 5.67. Epsilon Sagittae is the primary component of a multiple-star system. The iron abundance of Epsilon Sagittae is +0.01 (102.3% of the Sun). It is moving through the Galaxy at a speed of 36.2 km/s relative to the Sun. Its projected Galactic orbit carries it between 20,400 and 25,300 light years from the center of the Galaxy. It will come closest to the Sun 3.6 million years from now when it will brighten to magnitude 3.70 from a distance of 193 light years.

Sky position: RA 19h 37.3m, Dec +16 27.6'

Common designations: Epsilon Sagittae, 4 Sagittae, HIP 96516, HD 185194, HR 7463

Vistas of Many Worlds

An engaging romp through the Galaxy!



Galactic Orbit of Epsilon Sagittae

(compared to the Sun)

Eccentricity: 10.7% vs. 16.0%

Angle φ : -118.5 vs. 26.0

Semi-major axis : 7,021 pc vs. 8,686 pc

Semi-minor axis: 6,981 pc vs. 8,574 pc

Focus-to-center: 748 pc vs. 1,388 pc

Semilatus rectum : 6,941 pc vs. 8,464 pc

Perigalacticon: 6,273 pc vs. 7,297 pc

Apogalacticon: 7,768 pc vs. 10,074 pc
 


Some Tabulated XHIP Data for Epsilon Sagittae
(see also: SIMBAD)

Astrometry
2007A&A...474..653V
  Position Proper Motion
Right Ascension: 294.32243022 0.23 mas 16.70 0.70 mas/yr.
Declination: 16.46276929 0.21 mas 12.80 0.70 mas/yr.
     
Galactic Longitude: 52.77208070 19.32 mas/yr.
Galactic Latitude: -2.31525587 -8.33 mas/yr.

Parallax: 6.79 0.37 mas


Spectrography

Spectral Type: G9III Ba0.5 1985ApJS...59...95A.

Radial Velocity: -33.10 0.30 km/s [A rating] 2006AstL...32..759G.

Iron Abundance [Fe/H]: 0.01 dex  2007A&A...475.1003H.
 



Photometry
 
band magnitude Abs. Mag.
U
B 6.68 0.84
V 5.67 -0.16
R
I 4.79 -1.04
J 4.24 -1.59
H 3.76 -2.07
K 3.70 -2.13

  B-V: +1.01       V-I: +0.88


Derivations

Heliocentric distance: 146.75 pc (5.4% margin of error)

Galactocentric distance: 7,312 pc

Transverse velocity: 14.6 km/s

3D heliocentric position and motion:

toward:   

Galactic center Galactic rotation North Galactic Pole
Position ( X, Y, Z) 88.7 pc 116.8 pc -5.9 pc
Velocity (U, V, W) -30.9 km/s -18.4 km/s -4.5 km/s

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