31 Aquilae

Above the horizon. Rise: 21:10 | Tran: 4:14 | Set: 11:13

Alt: 42.90° Az: 224.61° Direction: South-West

31 Aquilae is a variable and multiple sub-giant star of spectral class G8 in the constellation of Aquila.

31 Aquilae visual magnitude is 5.16. Because of its faintness, 31 Aquilae 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 31 Aquilae. The red arrow shows the motion of 31 Aquilae during the next 1000 years (12.03 arcmin in Right Ascension and 10.72 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 19h 26m 09s

Declination +11° 59’ 45”

Hour Angle 02h 06m 56s

Sidereal Time 21h 33m 05s

J2000

Right Ascension 19h 24m 58s

Declination +11° 56’ 39”

Galactic Coordinates

Galactic Longitude 47.36°

Galactic Latitude -1.86°

Finder Chart

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Finder chart for 31 Aquilae.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.16

Class Sub-giant

Absolute magnitude 4.26

Spectral Type G8IV

Color Index (B-V) 0.77

Temperature 5373K

The red dot in the diagram below shows where 31 Aquilae is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 31 Aquilae. Attribution: Richard Powell / CC BY-SA

Star System Properties

31 Aquilae is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the 31 Aquilae double sysyem:

Main star magnitude 5.16

Secondary star magnitude 8.66

Magnitude difference 3.5

Separation 105.6 arcsec

Distance, Radial Speed, Proper Motion

31 Aquilae is distant 49.39 light years from the Sun and it is moving towards the Sun at the speed of 100 kilometers per second.

Distance (parsec) 15.15

Distance (light year) 49.39

Radial Speed -100 km/s

Proper Motion RA 0.722 arcsec/y

Proper Motion Dec 0.643"/y

Alternative Designations

Flamsteed designation 31 Aquilae

Henry Draper Catalogue HD182572

SAO Catalogue SAO104807

Hipparcos Catalogue HIP95447

Durchmusterung Catalogue BD+11 3833

Gliese Catalogue Gl 759

FK5 Catalogue 1503

General Catalogue of Variable Stars 11994

Visibility from Your Location

Today's 31 Aquilae rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 78.0° RISE 21:10

Max altitude: 50.5° TRANSIT 4:14

Azimuth: 282.0° SET 11:13

Set Location

Other stars in Aquila