Aladfar - η Lyrae (eta Lyrae)
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 skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.
The table below summarizes the key facts about Aladfar:
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:
The simplified sky map below shows the position of Aladfar in the sky:
Visibility of Aladfar from your location
Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London
Aladfar - η Lyrae (eta Lyrae) is circumpolar and transits at 10:40 UTC (altitude: 77.7°)
Digitized Sky Survey image of Aladfar
The image below is a photograph of Aladfar from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). 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.
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.
Spectral properties of Aladfar
Aladfar belongs to spectral class B2 and has a luminosity class of IV corresponding to a sub-giant star.
The red dot in the diagram below shows where Aladfar is situated in the Hertzsprung–Russell diagram.
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: