40 Serpentis

Below the horizon. Rise: 10:22 | Tran: 17:03 | Set: 23:44

Alt: -28.10° Az: 19.94° Direction: North-North-East

40 Serpentis is a variable main-sequence star of spectral class A7 in the constellation of Serpens.

40 Serpentis visual magnitude is 6.29. Because of its faintness, 40 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 40 Serpentis. The red arrow shows the motion of 40 Serpentis during the next 100000 years (3.33 arcmin in Right Ascension and 3.33 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 15h 55m 52s

Declination +08° 30’ 32”

Hour Angle 13h 10m 51s

Sideral Time 05h 06m 43s

J2000

Right Ascension 15h 54m 40s

Declination +08° 34’ 49”

Galactic Coordinates

Galactic Longitude 18.57°

Galactic Latitude 42.96°

Finder Chart

Simplified finder chart for 40 Serpentis.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.29

Class Main-sequence

Absolute magnitude 1.95

Spectral Type A7V

Color Index (B-V) 0.18

Temperature 8321K

The red dot in the diagram below shows where 40 Serpentis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 40 Serpentis. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

40 Serpentis is distant 240.77 light years from the Sun and it is moving towards the Sun at the speed of 25 kilometers per second.

Distance (parsec) 73.86

Distance (light year) 240.77

Radial Speed -25 km/s

Proper Motion RA 0.002 arcsec/y

Proper Motion Dec 0.002"/y

Alternative Designations

Flamsteed designation 40 Serpentis

Henry Draper Catalogue HD142500

SAO Catalogue SAO121254

Hipparcos Catalogue HIP77910

Durchmusterung Catalogue BD+09 3116

FK5 Catalogue 3256

General Catalogue of Variable Stars FP Ser

Visibility from Your Location

Today's 40 Serpentis rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 81.5° RISE 10:22

Max altitude: 47.0° TRANSIT 17:03

Azimuth: 278.5° SET 23:44

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

Location

Other stars in Serpens