β Equulei (beta Equulei)

Below the horizon. Rise: 21:29 | Tran: 4:06 | Set: 10:39

Alt: -8.72° Az: 67.14° Direction: South-West

β Equulei is a multiple main-sequence star of spectral class A3 in the constellation of Equuleus.

β Equulei visual magnitude is 5.16. Because of its faintness, β Equulei 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 β Equulei. The red arrow shows the motion of β Equulei during the next 10000 years (9.33 arcmin in Right Ascension and 1.67 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 21h 24m 09s

Declination +06° 55’ 16”

Hour Angle 16h 26m 14s

Sidereal Time 13h 50m 23s

J2000

Right Ascension 21h 22m 53s

Declination +06° 48’ 39”

Galactic Coordinates

Galactic Longitude 59°

Galactic Latitude -29.23°

Finder Chart

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Finder chart for β Equulei (beta Equulei).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.16

Class Main-sequence

Absolute magnitude -0.05

Spectral Type A3V

Color Index (B-V) 0.05

Temperature 9542K

The red dot in the diagram below shows where β Equulei is situated in the Hertzsprung–Russell diagram.

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

Star System Properties

β Equulei 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 β Equulei double sysyem:

Main star magnitude 5.16

Secondary star magnitude 11.66

Magnitude difference 6.5

Separation 89.2 arcsec

Distance, Radial Speed, Proper Motion

β Equulei is distant 359.82 light years from the Sun and it is moving towards the Sun at the speed of 11 kilometers per second.

Distance (parsec) 110.38

Distance (light year) 359.82

Radial Speed -11 km/s

Proper Motion RA 0.056 arcsec/y

Proper Motion Dec 0.01"/y

Alternative Designations

Bayer designation β Equulei
(beta Equulei)

Flamsteed designation 10 Equulei

Henry Draper Catalogue HD203562

SAO Catalogue SAO126749

Hipparcos Catalogue HIP105570

Durchmusterung Catalogue BD+06 4811

Aitken Double Star Catalogue ADS14920

Visibility from Your Location

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

Azimuth: 83.1° RISE 21:29

Max altitude: 45.4° TRANSIT 4:06

Azimuth: 276.9° SET 10:39

Set Location

Other stars in Equuleus