1 Vulpeculae

Above the horizon. Rise: 20:53 | Tran: 4:52 | Set: 12:48

Alt: 2.63° Az: 58.01° Direction: East-North-East

1 Vulpeculae is a variable and multiple sub-giant star of spectral class B4 in the constellation of Vulpecula.

1 Vulpeculae visual magnitude is 4.77. Because of its moderate brightness, 1 Vulpeculae 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.

DSS2 image of 1 Vulpeculae. The red arrow shows the motion of 1 Vulpeculae during the next 100000 years (0.00 arcmin in Right Ascension and -15.00 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 19h 17m 18s

Declination +21° 26’ 12”

Hour Angle 16h 22m 08s

Sidereal Time 11h 39m 27s

J2000

Right Ascension 19h 16m 13s

Declination +21° 23’ 25”

Galactic Coordinates

Galactic Longitude 54.74°

Galactic Latitude 4.41°

Finder Chart

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Finder chart for 1 Vulpeculae.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.77

Class Sub-giant

Absolute magnitude -2.46

Spectral Type B4IV

Color Index (B-V) -0.05

Temperature 10795K

The red dot in the diagram below shows where 1 Vulpeculae is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 1 Vulpeculae. Attribution: Richard Powell / CC BY-SA

Star System Properties

1 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 1 Vulpeculae double sysyem:

Main star magnitude 4.77

Secondary star magnitude 11.87

Magnitude difference 7.1

Separation 39.1 arcsec

Distance, Radial Speed, Proper Motion

1 Vulpeculae is distant 910.61 light years from the Sun and it is moving towards the Sun at the speed of 17 kilometers per second.

Distance (parsec) 279.33

Distance (light year) 910.61

Radial Speed -17 km/s

Proper Motion Dec -0.009"/y

Alternative Designations

Flamsteed designation 1 Vulpeculae

Henry Draper Catalogue HD180554

SAO Catalogue SAO87010

Hipparcos Catalogue HIP94703

Durchmusterung Catalogue BD+21 3713

FK5 Catalogue 3540

General Catalogue of Variable Stars 11866

Aitken Double Star Catalogue ADS12243

Visibility from Your Location

Today's 1 Vulpeculae rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 68.6° RISE 20:53

Max altitude: 60.0° TRANSIT 4:52

Azimuth: 291.4° SET 12:48

Set Location

Other stars in Vulpecula