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: 6:47  
clear_day Transit: 12:50  
SunsetSet: 18:52 south
sleep NighttimeWhat's Visible Now
All Constellations » Sextans » 


Altitude: -44.0°   Azimuth: 336.6°   Direction: North-North-West

HR4122 is a multiple giant star in the constellation of Sextans.

HR4122 visual magnitude is 6.2. Because of its reltive faintness, HR4122 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 HR4122:


HR4122 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -44.0°
Azimuth: 336.6°
Direction: North-North-West

Celestial coordinates and finder chart of HR4122

HR4122 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 HR4122 are provided in the following table:

10h 30m 58s
-07° 38’ 15”

The simplified sky map below shows the position of HR4122 in the sky:

Finder chart HR4122 star
Simplified finder chart for HR4122.

Visibility of HR4122 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 HR4122 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: 97.6°
Max altitude: 30.9°
Azimuth: 262.4°

Digitized Sky Survey image of HR4122

The image below is a photograph of HR4122 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 HR4122 is -0.039 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 HR4122 star
DSS2 image of HR4122. The red arrow shows the motion of HR4122 during the next 10000 years (-6.50 arcmin in Right Ascension and 0.83 arcmin in declination);

Distance of HR4122 from the Sun and relative movement

HR4122 is distant 767.06 light years from the Sun and it is moving far from the Sun at the speed of 7 kilometers per second.

235.29 pc
767.06 ly
7 km/s
-0.039 arcsec/year
0.005 arcsec/year

Spectral properties of HR4122

HR4122 belongs to spectral class K5 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR4122 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR4122. Attribution: Richard Powell / CC BY-SA

HR4122 star system properties

HR4122 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 HR4122 double sysyem:

2.8 arcsec

Alternative designations of HR4122