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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
SunriseRise: 6:38  
clear_day Transit: 12:10  
SunsetSet: 17:43
wb_twilight Astronomical TwilightWhat's Visible Now?
All Constellations » Ara » 


Altitude: -78.8°   Azimuth: 131.9°   Direction: South-East

HR6438 is a double supergiant star in the constellation of Ara.

HR6438 visual magnitude is 5.88. Because of its reltive faintness, HR6438 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR6438 is -0.021 arcsec per year in Right Ascension and -0.011 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR6438 star
DSS2 image of HR6438. The red arrow shows the motion of HR6438 during the next 10000 years (-3.50 arcmin in Right Ascension and -1.83 arcmin in declination);

Key facts about HR6438


HR6438 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -78.8°
Azimuth: 131.9°
Direction: South-East

Celestial coordinates and finder chart of HR6438

HR6438 is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR6438 are provided in the following table:

17h 22m 54s
-58° 00’ 37”

The simplified sky map below shows the position of HR6438 in the sky:

Finder chart HR6438 star
Simplified finder chart for HR6438.

Visibility of HR6438 from your location

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

HR6438 is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of HR6438 from the Sun and relative movement

HR6438 is distant 785.54 light years from the Sun and it is moving towards the Sun at the speed of 10 kilometers per second.

240.96 pc
785.54 ly
-10 km/s
-0.021 arcsec/year
-0.011 arcsec/year

Spectral properties of HR6438

HR6438 belongs to spectral class G8 and has a luminosity class of I corresponding to a supergiant star.


The red dot in the diagram below shows where HR6438 is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of HR6438. Attribution: Richard Powell / CC BY-SA

HR6438 star system properties

HR6438 is a visual double star which can be observed with the help of medium or large telescopes. The table below shows key information about the HR6438 double sysyem:

2 arcsec

Alternative designations of HR6438