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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: 5:43  
clear_day Transit: 12:56  
SunsetSet: 20:10
sunny DaytimeWhat's Visible Now?
All Constellations » Vela » 


Altitude: -80.1°   Azimuth: 350.2°   Direction: North

HR4001 is a giant star in the constellation of Vela.

HR4001 visual magnitude is 5.98. Because of its reltive faintness, HR4001 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 HR4001 is 0.05 arcsec per year in Right Ascension and -0.12 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR4001 star
DSS2 image of HR4001. The red arrow shows the motion of HR4001 during the next 1000 years (0.83 arcmin in Right Ascension and -2.00 arcmin in declination);

Key facts about HR4001


HR4001 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -80.1°
Azimuth: 350.2°
Direction: North

Celestial coordinates and finder chart of HR4001

HR4001 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 HR4001 are provided in the following table:

10h 10m 37s
-41° 42’ 54”

The simplified sky map below shows the position of HR4001 in the sky:

Finder chart HR4001 star
Simplified finder chart for HR4001.

Visibility of HR4001 from your location

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

HR4001 is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of HR4001 from the Sun and relative movement

HR4001 is distant 222.83 light years from the Sun and it is moving far from the Sun at the speed of 33 kilometers per second.

68.35 pc
222.83 ly
33 km/s
0.05 arcsec/year
-0.12 arcsec/year

Spectral properties of HR4001

HR4001 belongs to spectral class K2 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR4001 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR4001. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4001