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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: 7:51  
clear_day Transit: 11:50  
SunsetSet: 15:49 south
sunny DaytimeWhat's Visible Now?
All Constellations » Aquarius » 


Altitude: -38.9°   Azimuth: 46.4°   Direction: North-East

HR9040 is a hypergiant star in the constellation of Aquarius.

HR9040 visual magnitude is 5.75. Because of its reltive faintness, HR9040 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 HR9040:


HR9040 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -38.9°
Azimuth: 46.4°
Direction: North-East

Celestial coordinates and finder chart of HR9040

HR9040 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 HR9040 are provided in the following table:

23h 52m 50s
-08° 59’ 48”

The simplified sky map below shows the position of HR9040 in the sky:

Finder chart HR9040 star
Simplified finder chart for HR9040.

Visibility of HR9040 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 HR9040 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: 99.0°
Max altitude: 29.5°
Azimuth: 261.0°

Digitized Sky Survey image of HR9040

The image below is a photograph of HR9040 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 HR9040 is 0.064 arcsec per year in Right Ascension and -0.021 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR9040 star
DSS2 image of HR9040. The red arrow shows the motion of HR9040 during the next 10000 years (10.67 arcmin in Right Ascension and -3.50 arcmin in declination);

Distance of HR9040 from the Sun and relative movement

HR9040 is distant 611.63 light years from the Sun and it is moving towards the Sun at the speed of 18 kilometers per second.

187.62 pc
611.63 ly
-18 km/s
0.064 arcsec/year
-0.021 arcsec/year

Spectral properties of HR9040

HR9040 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 HR9040 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR9040. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR9040