7 Serpentis

Above the horizon. Rise: 9:36 | Tran: 16:39 | Set: 23:41

Alt: 19.81° Az: 265.20° Direction: West

7 Serpentis is a hypergiant star of spectral class A0 in the constellation of Serpens.

7 Serpentis visual magnitude is 6.28. Because of its faintness, 7 Serpentis 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 7 Serpentis. The red arrow shows the motion of 7 Serpentis during the next 100000 years (-6.67 arcmin in Right Ascension and -6.67 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 15h 23m 33s

Declination +12° 28’ 49”

Hour Angle 04h 55m 08s

Sideral Time 20h 18m 42s

J2000

Right Ascension 15h 22m 23s

Declination +12° 34’ 03”

Galactic Coordinates

Galactic Longitude 18.09°

Galactic Latitude 51.83°

Finder Chart

Simplified finder chart for 7 Serpentis.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.28

Class Hypergiant

Absolute magnitude 0.61

Spectral Type A0V

Color Index (B-V) -0.02

Temperature 10382K

The red dot in the diagram below shows where 7 Serpentis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 7 Serpentis. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

7 Serpentis is distant 444.75 light years from the Sun and it is moving far from the Sun at the speed of 4 kilometers per second.

Distance (parsec) 136.43

Distance (light year) 444.75

Radial Speed 4 km/s

Proper Motion RA -0.004 arcsec/y

Proper Motion Dec -0.004"/y

Alternative Designations

Flamsteed designation 7 Serpentis

Henry Draper Catalogue HD136831

SAO Catalogue SAO101508

Hipparcos Catalogue HIP75230

Durchmusterung Catalogue BD+13 2928

FK5 Catalogue 3213

Visibility from Your Location

Today's 7 Serpentis rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 77.5° RISE 9:36

Max altitude: 51.0° TRANSIT 16:39

Azimuth: 282.5° SET 23:41

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

Location

Other stars in Serpens