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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
north SunriseRise: 7:38  
clear_day Transit: 11:46  
SunsetSet: 15:54 south
sleep NighttimeWhat's Visible Now?
All Constellations » Andromeda » 


Altitude: 29.1°   Azimuth: 299.4°   Direction: West-North-West

HR422 is a hypergiant star in the constellation of Andromeda.

HR422 visual magnitude is 6.6. Because of its reltive faintness, HR422 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about HR422:


HR422 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 29.1°
Azimuth: 299.4°
Direction: West-North-West

Celestial coordinates and finder chart of HR422

HR422 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 HR422 are provided in the following table:

01h 27m 47s
+40° 20’ 08”

The simplified sky map below shows the position of HR422 in the sky:

Finder chart HR422 star
Simplified finder chart for HR422.

Visibility of HR422 from your location

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

HR422 is circumpolar and transits at 20:53 UTC (altitude: 78.9°)

Digitized Sky Survey image of HR422

The image below is a photograph of HR422 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 HR422 is 0.015 arcsec per year in Right Ascension and -0.019 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR422 star
DSS2 image of HR422. The red arrow shows the motion of HR422 during the next 10000 years (2.50 arcmin in Right Ascension and -3.17 arcmin in declination);

Distance of HR422 from the Sun and relative movement

HR422 is distant 920.90 light years from the Sun and it is moving towards the Sun at the speed of 1 kilometers per second.

282.49 pc
920.90 ly
-1 km/s
0.015 arcsec/year
-0.019 arcsec/year

Spectral properties of HR422

HR422 belongs to spectral class A0 and has a luminosity class of III corresponding to a hypergiant star.


The red dot in the diagram below shows where HR422 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR422. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR422