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public LocationGreenwich, UK
TimezoneEurope/London
Sunrise: 5:15 
Transit: 13:06 
Sunset: 20:56
sunny   (Daytime)   What's Visible Now?
All Constellations » Aquila » 

Okab - ζ Aquilae (zeta Aquilae)

Below the horizon.  Rise: 16:39 | Tran: 23:50 | Set: 7:04
Alt: -24.61°   Az: 0.97°   Direction: North

Okab, also designated as ζ Aquilae (zeta Aquilae), is a variable and multiple hypergiant star of spectral class A0 in the constellation of Aquila.

Okab visual magnitude is 2.99. Because of its brightness, Okab is clearly visible to the naked eye when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.

Image of Okab - ζ Aquilae (zeta Aquilae) star
DSS2 image of Okab. The red arrow shows the motion of Okab during the next 1000 years (-0.08 arcmin in Right Ascension and -1.60 arcmin in declination);

Celestial Coordinates

Apparent

19h 06m 32s
+13° 54’ 07”
12h 03m 37s
07h 10m 09s

J2000

19h 05m 24s
+13° 51’ 47”

Galactic Coordinates

46.86°
3.25°

Finder Chart

Finder chart Okab - ζ Aquilae (zeta Aquilae) star
Simplified finder chart for Okab - ζ Aquilae (zeta Aquilae).

Magnitude, Color, Spectral Class

2.99
Hypergiant

0.96
A0V
10002K

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

HR Diagram
H-R diagram showing the position of Okab. Attribution: Richard Powell / CC BY-SA

Star System Properties

Okab is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the Okab double sysyem:

2.99
11.39
8.4
158.6 arcsec

Distance, Radial Speed, Proper Motion

Okab is distant 83.21 light years from the Sun and it is moving towards the Sun at the speed of 25 kilometers per second.

25.52
83.21
-25 km/s
-0.005 arcsec/y
-0.096"/y

Alternative Designations

Okab
ζ Aquilae
(zeta Aquilae)
SAO104461
SAO104461
NN 4095 A

Visibility from Your Location

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

Azimuth: 76.1°
Max altitude: 52.4°
Azimuth: 283.9°