4 Vulpeculae

Above the horizon. Rise: 12:56 | Tran: 20:41 | Set: 4:30

Alt: 57.97° Az: 168.58° Direction: South-South-East

4 Vulpeculae is a multiple hypergiant star of spectral class K0 in the constellation of Vulpecula.

4 Vulpeculae visual magnitude is 5.16. Because of its faintness, 4 Vulpeculae 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 Vulpeculae. The red arrow shows the motion of 4 Vulpeculae during the next 1000 years (1.58 arcmin in Right Ascension and -1.05 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 19h 26m 33s

Declination +19° 50’ 56”

Hour Angle 23h 34m 21s

Sideral Time 19h 00m 55s

J2000

Right Ascension 19h 25m 28s

Declination +19° 47’ 54”

Galactic Coordinates

Galactic Longitude 54.35°

Galactic Latitude 1.75°

Finder Chart

Simplified finder chart for 4 Vulpeculae.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.16

Class Hypergiant

Absolute magnitude 0.86

Spectral Type K0III

Color Index (B-V) 0.98

Temperature 4791K

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

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

Star System Properties

4 Vulpeculae 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 Vulpeculae double sysyem:

Main star magnitude 5.16

Secondary star magnitude 11.36

Magnitude difference 6.2

Separation 18.9 arcsec

Distance, Radial Speed, Proper Motion

4 Vulpeculae is distant 236.57 light years from the Sun and it is moving towards the Sun at the speed of 1 kilometers per second.

Distance (parsec) 72.57

Distance (light year) 236.57

Radial Speed -1 km/s

Proper Motion RA 0.095 arcsec/y

Proper Motion Dec -0.063"/y

Alternative Designations

Flamsteed designation 4 Vulpeculae

Henry Draper Catalogue HD182762

SAO Catalogue SAO104818

Hipparcos Catalogue HIP95498

Durchmusterung Catalogue BD+19 4010

Aitken Double Star Catalogue ADS12425

Visibility from Your Location

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

Azimuth: 70.2° RISE 12:56

Max altitude: 58.4° TRANSIT 20:41

Azimuth: 289.8° SET 4:30

Name:	Greenwich, UK
Latitude:	51° 28' 48.0" N
Longitude:	0° 0' 0.0" E
Timezone:	Europe/London

Location

Other stars in Vulpecula