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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
north SunriseRise: 7:44  
clear_day Transit: 11:48  
SunsetSet: 15:51 south
sleep NighttimeWhat's Visible Now?
All Constellations » Sextans » 


Altitude: -13.0°   Azimuth: 90.7°   Direction: East

HR4155 is a hypergiant star in the constellation of Sextans.

HR4155 visual magnitude is 6.57. Because of its reltive faintness, HR4155 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 HR4155:


HR4155 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -13.0°
Azimuth: 90.7°
Direction: East

Celestial coordinates and finder chart of HR4155

HR4155 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 HR4155 are provided in the following table:

10h 36m 17s
-10° 34’ 59”

The simplified sky map below shows the position of HR4155 in the sky:

Finder chart HR4155 star
Simplified finder chart for HR4155.

Visibility of HR4155 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 HR4155 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: 100.6°
Max altitude: 27.9°
Azimuth: 259.4°

Digitized Sky Survey image of HR4155

The image below is a photograph of HR4155 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 HR4155 is 0.018 arcsec per year in Right Ascension and -0.033 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4155 star
DSS2 image of HR4155. The red arrow shows the motion of HR4155 during the next 10000 years (3.00 arcmin in Right Ascension and -5.50 arcmin in declination);

Distance of HR4155 from the Sun and relative movement

HR4155 is distant 187.68 light years from the Sun and it is moving towards the Sun at the speed of 22 kilometers per second.

57.57 pc
187.68 ly
-22 km/s
0.018 arcsec/year
-0.033 arcsec/year

Spectral properties of HR4155

HR4155 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 HR4155 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR4155. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4155