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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: 6:40  
clear_day Transit: 12:10  
SunsetSet: 17:41
sunny DaytimeWhat's Visible Now?
All Constellations » Hydra » 


Altitude: -51.8°   Azimuth: 294.6°   Direction: West-North-West

HR4011 is a star in the constellation of Hydra.

HR4011 visual magnitude is 6.25. Because of its reltive faintness, HR4011 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 HR4011 is -0.056 arcsec per year in Right Ascension and 0.038 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4011 star
DSS2 image of HR4011. The red arrow shows the motion of HR4011 during the next 10000 years (-9.33 arcmin in Right Ascension and 6.33 arcmin in declination);

Key facts about HR4011


HR4011 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -51.8°
Azimuth: 294.6°
Direction: West-North-West

Celestial coordinates and finder chart of HR4011

HR4011 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 HR4011 are provided in the following table:

10h 13m 19s
-27° 01’ 44”

The simplified sky map below shows the position of HR4011 in the sky:

Finder chart HR4011 star
Simplified finder chart for HR4011.

Visibility of HR4011 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 HR4011 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: 117.0°
Max altitude: 11.5°
Azimuth: 243.0°

Distance of HR4011 from the Sun and relative movement

HR4011 is distant 408.52 light years from the Sun and it is moving far from the Sun at the speed of 18 kilometers per second.

125.31 pc
408.52 ly
18 km/s
-0.056 arcsec/year
0.038 arcsec/year

Spectral properties of HR4011

HR4011 belongs to spectral class A9


The red dot in the diagram below shows where HR4011 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4011. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4011