13 Sagittae

Above the horizon. Rise: 13:48 | Tran: 21:20 | Set: 4:55

Alt: 39.97° Az: 245.16° Direction: West-South-West

13 Sagittae is a variable and double giant star of spectral class M4 in the constellation of Sagitta.

13 Sagittae visual magnitude is 5.37. Because of its faintness, 13 Sagittae is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

DSS2 image of 13 Sagittae. The red arrow shows the motion of 13 Sagittae during the next 10000 years (0.67 arcmin in Right Ascension and -1.83 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 20h 01m 10s

Declination +17° 35’ 08”

Hour Angle 03h 07m 24s

Sideral Time 23h 08m 34s

J2000

Right Ascension 20h 00m 03s

Declination +17° 31’ 00”

Galactic Coordinates

Galactic Longitude 56.43°

Galactic Latitude -6.49°

Finder Chart

Simplified finder chart for 13 Sagittae.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.37

Class Giant

Absolute magnitude -1.43

Spectral Type M4III

Color Index (B-V) 1.67

Temperature 3555K

The red dot in the diagram below shows where 13 Sagittae is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 13 Sagittae. Attribution: Richard Powell / CC BY-SA

Star System Properties

13 Sagittae is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the 13 Sagittae double sysyem:

Main star magnitude 5.37

Secondary star magnitude 12.87

Magnitude difference 7.5

Separation 28.5 arcsec

Distance, Radial Speed, Proper Motion

13 Sagittae is distant 746.00 light years from the Sun and it is moving towards the Sun at the speed of 17 kilometers per second.

Distance (parsec) 228.83

Distance (light year) 746.00

Radial Speed -17 km/s

Proper Motion RA 0.004 arcsec/y

Proper Motion Dec -0.011"/y

Alternative Designations

Flamsteed designation 13 Sagittae

Henry Draper Catalogue HD189577

SAO Catalogue SAO105522

Hipparcos Catalogue HIP98438

Durchmusterung Catalogue BD+17 4183

General Catalogue of Variable Stars VZ Sge

Aitken Double Star Catalogue ADS13230

Visibility from Your Location

Today's 13 Sagittae rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 72.4° RISE 13:48

Max altitude: 56.1° TRANSIT 21:20

Azimuth: 287.6° SET 4:55

Name:	Greenwich, UK
Latitude:	51° 28' 48.0" N
Longitude:	0° 0' 0.0" E
Timezone:	Europe/London

Location

Other stars in Sagitta