4 Equulei

Below the horizon. Rise: 21:16 | Tran: 3:48 | Set: 10:17

Alt: -3.91° Az: 75.17° Direction: South-West

4 Equulei is a double main-sequence star of spectral class F8 in the constellation of Equuleus.

4 Equulei visual magnitude is 5.94. Because of its faintness, 4 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 4 Equulei. The red arrow shows the motion of 4 Equulei during the next 1000 years (-1.50 arcmin in Right Ascension and -2.15 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 21h 06m 42s

Declination +06° 03’ 40”

Hour Angle 17h 03m 35s

Sidereal Time 14h 10m 18s

J2000

Right Ascension 21h 05m 26s

Declination +05° 57’ 29”

Galactic Coordinates

Galactic Longitude 55.39°

Galactic Latitude -26.18°

Finder Chart

Loading map...

Finder chart for 4 Equulei.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.94

Class Main-sequence

Absolute magnitude 3.10

Spectral Type F8V

Color Index (B-V) 0.54

Temperature 6213K

The red dot in the diagram below shows where 4 Equulei is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 4 Equulei. Attribution: Richard Powell / CC BY-SA

Star System Properties

4 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 4 Equulei double sysyem:

Main star magnitude 5.94

Secondary star magnitude 12.34

Magnitude difference 6.4

Separation 34.9 arcsec

Distance, Radial Speed, Proper Motion

4 Equulei is distant 120.47 light years from the Sun and it is moving towards the Sun at the speed of 22 kilometers per second.

Distance (parsec) 36.95

Distance (light year) 120.47

Radial Speed -22 km/s

Proper Motion RA -0.09 arcsec/y

Proper Motion Dec -0.129"/y

Alternative Designations

Flamsteed designation 4 Equulei

Henry Draper Catalogue HD200790

SAO Catalogue SAO126535

Hipparcos Catalogue HIP104101

Durchmusterung Catalogue BD+05 4697

Visibility from Your Location

Today's 4 Equulei rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 83.9° RISE 21:16

Max altitude: 44.6° TRANSIT 3:48

Azimuth: 276.1° SET 10:17

Set Location

Other stars in Equuleus