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: 7:45  
clear_day Transit: 11:48  
SunsetSet: 15:51 south
wb_twilight Astronomical TwilightWhat's Visible Now?
All Constellations » Andromeda » 


Altitude: 64.4°   Azimuth: 107.8°   Direction: East-South-East

HR90 is a variable and double giant star in the constellation of Andromeda.

HR90 visual magnitude is 7.39. Because of its reltive faintness, HR90 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 HR90:


HR90 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 64.4°
Azimuth: 107.8°
Direction: East-South-East

Celestial coordinates and finder chart of HR90

HR90 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 HR90 are provided in the following table:

00h 24m 02s
+38° 34’ 37”

The simplified sky map below shows the position of HR90 in the sky:

Finder chart HR90 star
Simplified finder chart for HR90.

Visibility of HR90 from your location

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

HR90 is circumpolar and transits at 19:30 UTC (altitude: 77.1°)

Digitized Sky Survey image of HR90

The image below is a photograph of HR90 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 HR90 is -0.007 arcsec per year in Right Ascension and -0.023 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR90 star
DSS2 image of HR90. The red arrow shows the motion of HR90 during the next 10000 years (-1.17 arcmin in Right Ascension and -3.83 arcmin in declination);

Spectral properties of HR90

HR90 belongs to spectral class S6 and has a luminosity class of III corresponding to a giant star.


HR90 star system properties

HR90 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 HR90 double sysyem:

84.6 arcsec

Alternative designations of HR90