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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: 5:51  
clear_day Transit: 12:57  
SunsetSet: 20:04
sunny DaytimeWhat's Visible Now?
All Constellations » Vela » 


Altitude: -11.8°   Azimuth: 148.3°   Direction: South-South-East

HR4099 is a giant star in the constellation of Vela.

HR4099 visual magnitude is 6.13. Because of its reltive faintness, HR4099 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 HR4099 is -0.127 arcsec per year in Right Ascension and -0.052 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR4099 star
DSS2 image of HR4099. The red arrow shows the motion of HR4099 during the next 1000 years (-2.12 arcmin in Right Ascension and -0.87 arcmin in declination);

Key facts about HR4099


HR4099 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -11.8°
Azimuth: 148.3°
Direction: South-South-East

Celestial coordinates and finder chart of HR4099

HR4099 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 HR4099 are provided in the following table:

10h 26m 09s
-42° 44’ 20”

The simplified sky map below shows the position of HR4099 in the sky:

Finder chart HR4099 star
Simplified finder chart for HR4099.

Visibility of HR4099 from your location

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

HR4099 is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of HR4099 from the Sun and relative movement

HR4099 is distant 331.64 light years from the Sun and it is moving far from the Sun at the speed of 23 kilometers per second.

101.73 pc
331.64 ly
23 km/s
-0.127 arcsec/year
-0.052 arcsec/year

Spectral properties of HR4099

HR4099 belongs to spectral class K1 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR4099 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR4099. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4099