Delta Sagittae (HIP 97365)

Delta Sagittae is a red bright giant star in the constellation Sagitta. At 582 light years away, it is the 351st brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 3.68. Delta Sagittae is a multiple-star system. It is moving through the Galaxy at a speed of 9.8 km/s relative to the Sun. Its projected Galactic orbit carries it between 23,800 and 35,300 light years from the center of the Galaxy.

Sky position: RA 19h 47.4m, Dec +18 31.8'

Common designations: Delta Sagittae, 7 Sagittae, HIP 97365, HD 187076, HR 7536

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2014 Moon Calendar
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Brightest stars in Sagitta:
(list all)

1

|    3.51

)   Gamma Sagittae

2

|    3.68

)   Delta Sagittae

3

|    4.39

)   Sham

4

|    4.39

)   Beta Sagittae

5

|    5.01

)   Zeta Sagittae

6

|    5.09

)   Eta Sagittae

7

|    5.33

)   13 Sagittae

8

|    5.54

)   11 Sagittae

9

|    5.65

)   1 Sagittae

10

|    5.67

)   Epsilon Sagittae

11

|    5.71

)   10 Sagittae

12

|    5.80

)   15 Sagittae

13

|    5.82

)   HR 7780

14

|    5.99

)   HR 7662

15

|    6.03

)   HR 7299

16

|    6.08

)   Gliese 746

17

|    6.11

)   HR 7216

Location of Delta Sagittae circled
Map detail from Stars of the Northern Hemisphere
Hover over other bright stars to identify or click to jump.


Galactic Orbit of Delta Sagittae

(compared to the Sun)

Eccentricity: 19.4% vs. 16.0%

Angle φ : 2.5 vs. 26.0

Semi-major axis : 9,062 pc vs. 8,686 pc

Semi-minor axis: 8,889 pc vs. 8,574 pc

Focus-to-center: 1,761 pc vs. 1,388 pc

Semilatus rectum : 8,719 pc vs. 8,464 pc

Perigalacticon: 7,300 pc vs. 7,297 pc

Apogalacticon: 10,823 pc vs. 10,074 pc
 


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

Astrometry
2007A&A...474..653V
  Position Proper Motion
Right Ascension: 296.84693825 0.45 mas 5.70 0.50 mas/yr.
Declination: 18.53425889 0.41 mas 10.00 0.50 mas/yr.
     
Galactic Longitude: 55.76685048 11.51 mas/yr.
Galactic Latitude: -3.38338383 0.08 mas/yr.

Parallax: 5.49 0.72 mas


Spectrography

Spectral Type: M2II + B0V 2000ApJ...541..298W.

Radial Velocity: 1.10 7.40 km/s [D rating] 2007AN....328..889K.
This star is a spectroscopic binary with an unsolved orbit.

Iron Abundance [Fe/H]: n/a
 



Photometry
 
band magnitude Abs. Mag.
U
B 4.99 -1.26
V 3.68 -2.58
R
I 2.71 -3.55
J
H
K

  B-V: +1.31       V-I: +0.97


Derivations

Heliocentric distance: 178.47 pc (13.1% margin of error)

Galactocentric distance: 7,301 pc

Transverse velocity: 9.7 km/s

3D heliocentric position and motion:

toward:   

Galactic center Galactic rotation North Galactic Pole
Position ( X, Y, Z) 100.2 pc 147.3 pc -10.5 pc
Velocity (U, V, W) -7.4 km/s 6.4 km/s 0.0 km/s

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