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public LocationGreenwich, UK
TimezoneEurope/London
Sunrise: 5:15 
Transit: 13:06 
Sunset: 20:56
sunny   (Daytime)   What's Visible Now?
All Constellations » Hydra » 

τ1 Hydrae (tau1 Hydrae)

Above the horizon.  Rise: 8:31 | Tran: 14:15 | Set: 19:59
Alt: 17.48°   Az: 118.69°   Direction: East-South-East

τ1 Hydrae is a double main-sequence star of spectral class F6 in the constellation of Hydra.

τ1 Hydrae visual magnitude is 4.6. Because of its moderate brightness, τ1 Hydrae 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 τ1 Hydrae (tau1 Hydrae) star
DSS2 image of τ1 Hydrae. The red arrow shows the motion of τ1 Hydrae during the next 1000 years (2.17 arcmin in Right Ascension and -0.25 arcmin in declination);

Celestial Coordinates

Apparent

09h 30m 23s
-02° 52’ 38”
20h 12m 22s
05h 42m 46s

J2000

09h 29m 08s
-02° 46’ 08”

Galactic Coordinates

236.23°
32.86°

Finder Chart

Finder chart τ1 Hydrae (tau1 Hydrae) star
Simplified finder chart for τ1 Hydrae (tau1 Hydrae).

Magnitude, Color, Spectral Class

4.6
Main-sequence

3.44
F6V
6576K

The red dot in the diagram below shows where τ1 Hydrae is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of τ1 Hydrae. Attribution: Richard Powell / CC BY-SA

Star System Properties

τ1 Hydrae is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the τ1 Hydrae double sysyem:

4.6
7.6
3
65.7 arcsec

Distance, Radial Speed, Proper Motion

τ1 Hydrae is distant 55.75 light years from the Sun and it is moving far from the Sun at the speed of 10 kilometers per second.

17.10
55.75
10 km/s
0.13 arcsec/y
-0.015"/y

Alternative Designations

τ1 Hydrae
(tau1 Hydrae)
SAO136895
SAO136895
Gl 348 A

Visibility from Your Location

Today's τ1 Hydrae (tau1 Hydrae) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 92.9°
Max altitude: 35.6°
Azimuth: 267.1°