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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: 5:51  
clear_day Transit: 12:57  
SunsetSet: 20:04
sunny DaytimeWhat's Visible Now?
All Constellations » Boötes » 


Altitude: 13.9°   Azimuth: 90.1°   Direction: East

HR5138 is a variable and multiple hypergiant star in the constellation of Boötes.

HR5138 visual magnitude is 5.57. Because of its reltive faintness, HR5138 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 HR5138 is -0.112 arcsec per year in Right Ascension and -0.013 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR5138 star
DSS2 image of HR5138. The red arrow shows the motion of HR5138 during the next 1000 years (-1.87 arcmin in Right Ascension and -0.22 arcmin in declination);

Key facts about HR5138


HR5138 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 13.9°
Azimuth: 90.1°
Direction: East

Celestial coordinates and finder chart of HR5138

HR5138 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 HR5138 are provided in the following table:

13h 39m 34s
+10° 44’ 45”

The simplified sky map below shows the position of HR5138 in the sky:

Finder chart HR5138 star
Simplified finder chart for HR5138.

Visibility of HR5138 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 HR5138 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: 79.3°
Max altitude: 49.3°
Azimuth: 280.7°

Distance of HR5138 from the Sun and relative movement

HR5138 is distant 174.52 light years from the Sun and it is moving towards the Sun at the speed of 18 kilometers per second.

53.53 pc
174.52 ly
-18 km/s
-0.112 arcsec/year
-0.013 arcsec/year

Spectral properties of HR5138

HR5138 belongs to spectral class F0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where HR5138 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR5138. Attribution: Richard Powell / CC BY-SA

HR5138 star system properties

HR5138 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR5138 double sysyem:

0.1 arcsec

Alternative designations of HR5138