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public LocationGreenwich, UK
Sunrise: 5:01 
Transit: 13:04 
Sunset: 21:06
sunny   (Daytime)   What's Visible Now?
All Constellations » Taurus » 

Secunda Hyadum - δ1 Tauri (delta1 Tauri)

Above the horizon.  Rise: 2:14 | Tran: 9:45 | Set: 17:17
Alt: 52.54°   Az: 147.31°   Direction: South-South-East

Secunda Hyadum, also designated as δ1 Tauri (delta1 Tauri), is a variable and multiple hypergiant star of spectral class K0 in the constellation of Taurus.

Secunda Hyadum visual magnitude is 3.76. Because of its moderate brightness, Secunda Hyadum 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.

Secunda Hyadum is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year.

Image of Secunda Hyadum - δ1 Tauri (delta1 Tauri) star
DSS2 image of Secunda Hyadum. The red arrow shows the motion of Secunda Hyadum during the next 1000 years (1.78 arcmin in Right Ascension and -0.50 arcmin in declination);

Celestial Coordinates


04h 24m 21s
+17° 35’ 53”
22h 39m 21s
03h 03m 43s


04h 22m 56s
+17° 32’ 33”

Galactic Coordinates


Finder Chart

Finder chart Secunda Hyadum - δ1 Tauri (delta1 Tauri) star
Simplified finder chart for Secunda Hyadum - δ1 Tauri (delta1 Tauri).

Magnitude, Color, Spectral Class



The red dot in the diagram below shows where Secunda Hyadum is situated in the Hertzsprung–Russell diagram.

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

Star System Properties

Secunda Hyadum 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 Secunda Hyadum double sysyem:

109.6 arcsec

Distance, Radial Speed, Proper Motion

Secunda Hyadum is distant 153.12 light years from the Sun and it is moving far from the Sun at the speed of 39 kilometers per second.

46.97 pc
153.12 ly
39 km/s
0.107 arcsec/y
-0.03 "/y

Alternative Designations

Secunda Hyadum
δ1 Tauri
(delta1 Tauri)

Visibility from Your Location

Today's Secunda Hyadum - δ1 Tauri (delta1 Tauri) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 72.4°
Max altitude: 56.1°
Azimuth: 287.6°