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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: 7:47  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
sunny DaytimeWhat's Visible Now?
All Constellations » Carina » 


Altitude: -46.0°   Azimuth: 228.8°   Direction: South-West

HR4091 is a variable giant star in the constellation of Carina.

HR4091 visual magnitude is 6.35. Because of its reltive faintness, HR4091 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 HR4091:


HR4091 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -46.0°
Azimuth: 228.8°
Direction: South-West

Celestial coordinates and finder chart of HR4091

HR4091 is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR4091 are provided in the following table:

10h 23m 50s
-57° 57’ 14”

The simplified sky map below shows the position of HR4091 in the sky:

Finder chart HR4091 star
Simplified finder chart for HR4091.

Visibility of HR4091 from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

HR4091 is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of HR4091

The image below is a photograph of HR4091 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 HR4091 is -0.001 arcsec per year in Right Ascension and -0.006 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR4091 star
DSS2 image of HR4091. The red arrow shows the motion of HR4091 during the next 100000 years (-1.67 arcmin in Right Ascension and -10.00 arcmin in declination);

Distance of HR4091 from the Sun and relative movement

HR4091 is distant 793.19 light years from the Sun and it is moving towards the Sun at the speed of 13 kilometers per second.

243.31 pc
793.19 ly
-13 km/s
-0.001 arcsec/year
-0.006 arcsec/year

Spectral properties of HR4091

HR4091 belongs to spectral class K4 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR4091 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4091. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4091