ζ1 Lyrae (zeta1 Lyrae)

Above the horizon. Rise: 15:56 | Tran: 1:24 | Set: 10:55

Alt: 20.59° Az: 303.33° Direction: West-North-West

ζ1 Lyrae is a variable and multiple star of spectral class A4 in the constellation of Lyra.

ζ1 Lyrae visual magnitude is 4.36. Because of its moderate brightness, ζ1 Lyrae is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

DSS2 image of ζ1 Lyrae. The red arrow shows the motion of ζ1 Lyrae during the next 10000 years (4.67 arcmin in Right Ascension and 4.00 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 18h 45m 39s

Declination +37° 37’ 58”

Hour Angle 06h 36m 06s

Sidereal Time 01h 21m 45s

J2000

Right Ascension 18h 44m 46s

Declination +37° 36’ 17”

Galactic Coordinates

Galactic Longitude 66.85°

Galactic Latitude 17.38°

Finder Chart

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Finder chart for ζ1 Lyrae (zeta1 Lyrae).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.36

Class

Absolute magnitude 0.99

Spectral Type A4

Color Index (B-V) 0.19

Temperature 8241K

The red dot in the diagram below shows where ζ1 Lyrae is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of ζ1 Lyrae. Attribution: Richard Powell / CC BY-SA

Star System Properties

ζ1 Lyrae is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the ζ1 Lyrae double sysyem:

Main star magnitude 4.36

Secondary star magnitude 5.76

Magnitude difference 1.4

Separation 43.7 arcsec

Distance, Radial Speed, Proper Motion

ζ1 Lyrae is distant 153.56 light years from the Sun and it is moving towards the Sun at the speed of 26 kilometers per second.

Distance (parsec) 47.10

Distance (light year) 153.56

Radial Speed -26 km/s

Proper Motion RA 0.028 arcsec/y

Proper Motion Dec 0.024"/y

Alternative Designations

Bayer designation ζ1 Lyrae
(zeta1 Lyrae)

Flamsteed designation 6 Lyrae

Henry Draper Catalogue HD173648

SAO Catalogue SAO67321

Hipparcos Catalogue HIP91971

Durchmusterung Catalogue BD+37 3222

General Catalogue of Variable Stars 11308

Aitken Double Star Catalogue ADS11639

Visibility from Your Location

Today's ζ1 Lyrae (zeta1 Lyrae) rise, transit and set times from Pricaz, Romania are the following (all times relative to the local timezone Europe/Bucharest):

Azimuth: 52.4° RISE 15:56

Max altitude: 81.8° TRANSIT 1:24

Azimuth: 307.6° SET 10:55

Name:	Pricaz, Romania
Latitude:	45° 51' 33.5" N
Longitude:	23° 10' 21.7" E
Timezone:	Europe/Bucharest

Set Location

Other stars in Lyra