σ1 Tauri (sigma1 Tauri)

Above the horizon. Rise: 21:18 | Tran: 4:43 | Set: 12:04

Alt: 54.30° Az: 184.41° Direction: South

σ1 Tauri is a multiple star of spectral class A4 in the constellation of Taurus.

σ1 Tauri visual magnitude is 5.07. Because of its faintness, σ1 Tauri 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 σ1 Tauri. The red arrow shows the motion of σ1 Tauri during the next 10000 years (6.50 arcmin in Right Ascension and -12.00 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 04h 40m 34s

Declination +15° 50’ 49”

Hour Angle 00h 10m 42s

Sideral Time 04h 51m 16s

J2000

Right Ascension 04h 39m 09s

Declination +15° 47’ 58”

Galactic Coordinates

Galactic Longitude 182.07°

Galactic Latitude -20.07°

Finder Chart

Simplified finder chart for σ1 Tauri (sigma1 Tauri).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.07

Class

Absolute magnitude 1.73

Spectral Type A4

Color Index (B-V) 0.15

Temperature 8571K

The red dot in the diagram below shows where σ1 Tauri is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of σ1 Tauri. Attribution: Richard Powell / CC BY-SA

Star System Properties

σ1 Tauri is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the σ1 Tauri double sysyem:

Main star magnitude 5.07

Secondary star magnitude 5.47

Magnitude difference 0.4

Separation 431.2 arcsec

Distance, Radial Speed, Proper Motion

σ1 Tauri is distant 151.70 light years from the Sun and it is moving far from the Sun at the speed of 19 kilometers per second.

Distance (parsec) 46.53

Distance (light year) 151.70

Radial Speed 19 km/s

Proper Motion RA 0.039 arcsec/y

Proper Motion Dec -0.072"/y

Alternative Designations

Bayer designation σ1 Tauri
(sigma1 Tauri)

Flamsteed designation 91 Tauri

Henry Draper Catalogue HD29479

SAO Catalogue SAO94051

Hipparcos Catalogue HIP21673

Durchmusterung Catalogue BD+15 665

Visibility from Your Location

Today's σ1 Tauri (sigma1 Tauri) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 74.2° RISE 21:18

Max altitude: 54.4° TRANSIT 4:43

Azimuth: 285.8° SET 12:04

Set Location

Other stars in Taurus