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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 » Aquarius » 


Altitude: -19.2°   Azimuth: 268.5°   Direction: West

HR9021 is a giant star in the constellation of Aquarius.

HR9021 visual magnitude is 6.24. Because of its reltive faintness, HR9021 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 HR9021:


HR9021 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -19.2°
Azimuth: 268.5°
Direction: West

Celestial coordinates and finder chart of HR9021

HR9021 is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR9021 are provided in the following table:

23h 49m 31s
-15° 51’ 39”

The simplified sky map below shows the position of HR9021 in the sky:

Finder chart HR9021 star
Simplified finder chart for HR9021.

Visibility of HR9021 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 HR9021 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: 105.9°
Max altitude: 22.7°
Azimuth: 254.1°

Digitized Sky Survey image of HR9021

The image below is a photograph of HR9021 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 HR9021 is 0.049 arcsec per year in Right Ascension and -0.022 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR9021 star
DSS2 image of HR9021. The red arrow shows the motion of HR9021 during the next 10000 years (8.17 arcmin in Right Ascension and -3.67 arcmin in declination);

Distance of HR9021 from the Sun and relative movement

HR9021 is distant 424.48 light years from the Sun and it is moving towards the Sun at the speed of 64 kilometers per second.

130.21 pc
424.48 ly
-64 km/s
0.049 arcsec/year
-0.022 arcsec/year

Spectral properties of HR9021

HR9021 belongs to spectral class K2 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR9021 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR9021. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR9021