τ7 Serpentis (tau7 Serpentis)

Above the horizon. Rise: 15:01 | Tran: 21:43 | Set: 4:26

Alt: 14.68° Az: 76.99° Direction: East-North-East

τ7 Serpentis is a star of spectral class A2 in the constellation of Serpens.

τ7 Serpentis visual magnitude is 5.81. Because of its faintness, τ7 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.

Image of τ7 Serpentis (tau7 Serpentis) star

DSS2 image of τ7 Serpentis. The red arrow shows the motion of τ7 Serpentis during the next 10000 years (-12.00 arcmin in Right Ascension and 8.83 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 15h 43m 03s

Declination +18° 23’ 01”

Hour Angle 18h 26m 42s

Sidereal Time 10h 09m 46s

J2000

Right Ascension 15h 41m 54s

Declination +18° 27’ 50”

Galactic Coordinates

Galactic Longitude 29.69°

Galactic Latitude 49.96°

Finder Chart

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Finder chart for τ7 Serpentis (tau7 Serpentis).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.81

Class

Absolute magnitude 2.18

Spectral Type A2

Color Index (B-V) 0.2

Temperature 8163K

The red dot in the diagram below shows where τ7 Serpentis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of τ7 Serpentis. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

τ7 Serpentis is distant 173.59 light years from the Sun and it is moving towards the Sun at the speed of 30 kilometers per second.

Distance (parsec) 53.25

Distance (light year) 173.59

Radial Speed -30 km/s

Proper Motion RA -0.072 arcsec/y

Proper Motion Dec 0.053"/y

Alternative Designations

Bayer designation τ7 Serpentis
(tau7 Serpentis)

Flamsteed designation 22 Serpentis

Henry Draper Catalogue HD140232

SAO Catalogue SAO101686

Hipparcos Catalogue HIP76878

Durchmusterung Catalogue BD+18 3059

Visibility from Your Location

Today's τ7 Serpentis (tau7 Serpentis) rise, transit and set times from Wanshun, China are the following (all times relative to the local timezone Asia/Shanghai):

Azimuth: 71.6° RISE 15:01

Max altitude: 78.3° TRANSIT 21:43

Azimuth: 288.4° SET 4:26

Name:	Wanshun, China
Latitude:	30° 2' 24.4" N
Longitude:	106° 58' 19.2" E
Timezone:	Asia/Shanghai

Set Location

Other stars in Serpens