We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
A Complete Guide to the Solar System and the Night Sky
Donate now and help us to keep this site free and ad-free!
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:49  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
sunny DaytimeWhat's Visible Now?
All Constellations » Andromeda » 


Altitude: 0.2°   Azimuth: 10.8°   Direction: North

HR521 is a hypergiant star in the constellation of Andromeda.

HR521 visual magnitude is 5.94. Because of its reltive faintness, HR521 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 HR521:


HR521 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 0.2°
Azimuth: 10.8°
Direction: North

Celestial coordinates and finder chart of HR521

HR521 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 HR521 are provided in the following table:

01h 48m 38s
+37° 57’ 10”

The simplified sky map below shows the position of HR521 in the sky:

Finder chart HR521 star
Simplified finder chart for HR521.

Visibility of HR521 from your location

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

Today's HR521 rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 52.0°
Max altitude: 76.5°
Azimuth: 308.0°

Digitized Sky Survey image of HR521

The image below is a photograph of HR521 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 HR521 is 0.112 arcsec per year in Right Ascension and -0.029 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR521 star
DSS2 image of HR521. The red arrow shows the motion of HR521 during the next 1000 years (1.87 arcmin in Right Ascension and -0.48 arcmin in declination);

Distance of HR521 from the Sun and relative movement

HR521 is distant 308.42 light years from the Sun and it is moving far from the Sun at the speed of 37 kilometers per second.

94.61 pc
308.42 ly
37 km/s
0.112 arcsec/year
-0.029 arcsec/year

Spectral properties of HR521

HR521 belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.


The red dot in the diagram below shows where HR521 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR521. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR521