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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: 15.9°   Azimuth: 70.2°   Direction: East-North-East

HR5123 is a variable giant star in the constellation of Boötes.

HR5123 visual magnitude is 5.74. Because of its reltive faintness, HR5123 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 HR5123 is -0.024 arcsec per year in Right Ascension and -0.005 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR5123 star
DSS2 image of HR5123. The red arrow shows the motion of HR5123 during the next 10000 years (-4.00 arcmin in Right Ascension and -0.83 arcmin in declination);

Key facts about HR5123


HR5123 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 15.9°
Azimuth: 70.2°
Direction: East-North-East

Celestial coordinates and finder chart of HR5123

HR5123 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 HR5123 are provided in the following table:

13h 36m 59s
+24° 36’ 47”

The simplified sky map below shows the position of HR5123 in the sky:

Finder chart HR5123 star
Simplified finder chart for HR5123.

Visibility of HR5123 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 HR5123 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: 65.4°
Max altitude: 63.1°
Azimuth: 294.6°

Distance of HR5123 from the Sun and relative movement

HR5123 is distant 505.43 light years from the Sun and it is moving towards the Sun at the speed of 31 kilometers per second.

155.04 pc
505.43 ly
-31 km/s
-0.024 arcsec/year
-0.005 arcsec/year

Spectral properties of HR5123

HR5123 belongs to spectral class M2 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR5123 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR5123. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR5123