Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:52  
clear_day Transit: 12:55  
SunsetSet: 20:59 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Apus » 


HR5540 is a variable giant star in the constellation of Apus.

HR5540 visual magnitude is 5.34. Because of its reltive faintness, HR5540 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 HR5540:

HR5540 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of HR5540

HR5540 is situated close to the southern celestial pole and, as such, it is easilty visible for most part of the year from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR5540 are provided in the following table:

14h 57m 52s
-76° 39’ 46”

The simplified sky map below shows the position of HR5540 in the sky:

Finder chart HR5540 star
Simplified finder chart for HR5540.

Visibility of HR5540 from your location

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

HR5540 is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of HR5540

The image below is a photograph of HR5540 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 HR5540 is -0.074 arcsec per year in Right Ascension and -0.015 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR5540 star
DSS2 image of HR5540. The red arrow shows the motion of HR5540 during the next 10000 years (-12.33 arcmin in Right Ascension and -2.50 arcmin in declination);

Distance of HR5540 from the Sun and relative movement

HR5540 is distant 427.82 light years from the Sun and it is moving towards the Sun at the speed of 31 kilometers per second.

131.23 pc
427.82 ly
-31 km/s
-0.074 arcsec/year
-0.015 arcsec/year

Spectral properties of HR5540

HR5540 belongs to spectral class K4 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR5540 is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of HR5540. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR5540