Alpheratz - α Andromedae (alpha Andromedae)
Alpheratz, also designated as α Andromedae (alpha Andromedae), is a variable and double sub-giant star in the constellation of Andromeda.
Alpheratz visual magnitude is 2.06, making it the 54th brightest star in the sky. Thanks to its high brightness, Alpheratz is clearly visible when observed from locations with dark skyes, and should be also quite easily visible from light polluted areas.
The table below summarizes the key facts about Alpheratz:
Celestial coordinates and finder chart of Alpheratz
Alpheratz 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 Alpheratz are provided in the following table:
The simplified sky map below shows the position of Alpheratz in the sky:
Visibility of Alpheratz from your location
Digitized Sky Survey image of Alpheratz
The image below is a photograph of Alpheratz 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 Alpheratz is 0.136 arcsec per year in Right Ascension and -0.163 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.
Distance of Alpheratz from the Sun and relative movement
Alpheratz is distant 97.02 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.
Spectral properties of Alpheratz
The red dot in the diagram below shows where Alpheratz is situated in the Hertzsprung–Russell diagram.
Alpheratz star system properties
Alpheratz 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 Alpheratz double sysyem: