δ1 Lyrae (delta1 Lyrae)

Above the horizon. Rise: 7:50 | Tran: 18:31 | Set: 5:16

Alt: 49.35° Az: 271.17° Direction: West

δ1 Lyrae is a variable and double main-sequence star of spectral class B2 in the constellation of Lyra.

δ1 Lyrae visual magnitude is 5.58. Because of its faintness, δ1 Lyrae 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 δ1 Lyrae. The red arrow shows the motion of δ1 Lyrae during the next 100000 years (6.67 arcmin in Right Ascension and -3.33 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 18h 54m 35s

Declination +37° 00’ 14”

Hour Angle 03h 38m 35s

Sideral Time 22h 33m 10s

J2000

Right Ascension 18h 53m 43s

Declination +36° 58’ 18”

Galactic Coordinates

Galactic Longitude 66.93°

Galactic Latitude 15.49°

Finder Chart

Simplified finder chart for δ1 Lyrae (delta1 Lyrae).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.58

Class Main-sequence

Absolute magnitude -2.02

Spectral Type B2V

Color Index (B-V) -0.15

Temperature 12489K

The red dot in the diagram below shows where δ1 Lyrae is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of δ1 Lyrae. Attribution: Richard Powell / CC BY-SA

Star System Properties

δ1 Lyrae is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the δ1 Lyrae double sysyem:

Main star magnitude 5.58

Secondary star magnitude 9.28

Magnitude difference 3.7

Separation 174.6 arcsec

Distance, Radial Speed, Proper Motion

δ1 Lyrae is distant 1,079.47 light years from the Sun and it is moving towards the Sun at the speed of 26 kilometers per second.

Distance (parsec) 331.13

Distance (light year) 1,079.47

Radial Speed -26 km/s

Proper Motion RA 0.004 arcsec/y

Proper Motion Dec -0.002"/y

Alternative Designations

Bayer designation δ1 Lyrae
(delta1 Lyrae)

Flamsteed designation 11 Lyrae

Henry Draper Catalogue HD175426

SAO Catalogue SAO67537

Hipparcos Catalogue HIP92728

Durchmusterung Catalogue BD+36 3307

FK5 Catalogue 3506

General Catalogue of Variable Stars 11504

Visibility from Your Location

Today's δ1 Lyrae (delta1 Lyrae) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 53.0° RISE 7:50

Max altitude: 75.5° TRANSIT 18:31

Azimuth: 307.0° SET 5:16

Set Location

Other stars in Lyra