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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 7:08 
Transit: 12:13 
Sunset: 17:20
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All Constellations » Sagittarius » 

τ Sagittarii (tau Sagittarii)

Below the horizon.  Rise: 5:59 | Tran: 9:14 | Set: 12:28
Alt: -59.67°   Az: 47.72°   Direction: North-East

τ Sagittarii is a giant star of spectral class K1 in the constellation of Sagittarius.

τ Sagittarii visual magnitude is 3.32. Because of its moderate brightness, τ Sagittarii is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

Image of τ Sagittarii (tau Sagittarii) star
DSS2 image of τ Sagittarii. The red arrow shows the motion of τ Sagittarii during the next 1000 years (-0.88 arcmin in Right Ascension and -4.18 arcmin in declination);

Celestial Coordinates

Apparent

19h 08m 30s
-27° 37’ 47”
13h 39m 45s
08h 48m 15s

J2000

19h 06m 56s
-27° 40’ 14”

Galactic Coordinates

9.34°
-15.37°

Finder Chart

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Finder chart for τ Sagittarii (tau Sagittarii).

Magnitude, Color, Spectral Class

3.32
Giant

0.48
K1III
4328K

The red dot in the diagram below shows where τ Sagittarii is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of τ Sagittarii. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

τ Sagittarii is distant 120.34 light years from the Sun and it is moving far from the Sun at the speed of 45 kilometers per second.

36.91
120.34
45 km/s
-0.053 arcsec/y
-0.251"/y

Alternative Designations

τ Sagittarii
(tau Sagittarii)
40 Sagittarii
SAO187683
SAO187683

Visibility from Your Location

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

Azimuth: 117.6°
Max altitude: 10.9°
Azimuth: 242.4°