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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:35  
clear_day Transit: 12:10  
SunsetSet: 17:45
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All Constellations » Lyra » 

Aladfar - η Lyrae (eta Lyrae)

Altitude: 62.5°   Azimuth: 257.5°   Direction: West-South-West

Aladfar, also designated as η Lyrae (eta Lyrae), is a variable and multiple sub-giant star in the constellation of Lyra.

Aladfar visual magnitude is 4.39. Because of its moderate brightness, Aladfar should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of Aladfar is 0.004 arcsec per year in Right Ascension and 0.002 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of Aladfar - η Lyrae (eta Lyrae) star
DSS2 image of Aladfar. The red arrow shows the motion of Aladfar during the next 100000 years (6.67 arcmin in Right Ascension and 3.33 arcmin in declination);

Key facts about Aladfar

4.39
Sub-giant

Aladfar - η Lyrae (eta Lyrae) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 62.5°
Azimuth: 257.5°
Direction: West-South-West

Celestial coordinates and finder chart of Aladfar

Aladfar is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Aladfar are provided in the following table:

19h 13m 45s
+39° 08’ 45”
70.62°
12.75°
Lyra

The simplified sky map below shows the position of Aladfar in the sky:

Finder chart Aladfar - η Lyrae (eta Lyrae) star
Simplified finder chart for Aladfar - η Lyrae (eta Lyrae).

Visibility of Aladfar from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Aladfar - η Lyrae (eta Lyrae) is circumpolar and transits at 08:19 UTC (altitude: 77.7°)

Distance of Aladfar from the Sun and relative movement

Aladfar is distant 1,041.53 light years from the Sun and it is moving towards the Sun at the speed of 8 kilometers per second.

319.49 pc
1,041.53 ly
-8 km/s
0.004 arcsec/year
0.002 arcsec/year

Spectral properties of Aladfar

Aladfar belongs to spectral class B2 and has a luminosity class of IV corresponding to a sub-giant star.

-3.13
B2IV
12489K

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

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

Aladfar star system properties

Aladfar is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the Aladfar double sysyem:

4.39
8.39
4
28.3 arcsec

Alternative designations of Aladfar

Aladfar
η Lyrae
(eta Lyrae)
SAO68010
SAO68010