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: 6:49  
clear_day Transit: 12:50  
SunsetSet: 18:50 south
sleep NighttimeWhat's Visible Now
All Constellations » Sextans » 


Altitude: -39.4°   Azimuth: 26.2°   Direction: North-North-East

HR4109 is a variable star in the constellation of Sextans.

HR4109 visual magnitude is 6.05. Because of its reltive faintness, HR4109 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 HR4109:


HR4109 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -39.4°
Azimuth: 26.2°
Direction: North-North-East

Celestial coordinates and finder chart of HR4109

HR4109 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 HR4109 are provided in the following table:

10h 28m 44s
-03° 44’ 33”

The simplified sky map below shows the position of HR4109 in the sky:

Finder chart HR4109 star
Simplified finder chart for HR4109.

Visibility of HR4109 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 HR4109 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: 93.7°
Max altitude: 34.8°
Azimuth: 266.3°

Digitized Sky Survey image of HR4109

The image below is a photograph of HR4109 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 HR4109 is 0.004 arcsec per year in Right Ascension and -0.027 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4109 star
DSS2 image of HR4109. The red arrow shows the motion of HR4109 during the next 10000 years (0.67 arcmin in Right Ascension and -4.50 arcmin in declination);

Distance of HR4109 from the Sun and relative movement

HR4109 is distant 243.65 light years from the Sun and it is moving towards the Sun at the speed of 26 kilometers per second.

74.74 pc
243.65 ly
-26 km/s
0.004 arcsec/year
-0.027 arcsec/year

Spectral properties of HR4109

HR4109 belongs to spectral class A1 HR4109 is also a Sr chemically peculiar star.


The red dot in the diagram below shows where HR4109 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR4109. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4109