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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 » Hydrus » 


Altitude: -30.3°   Azimuth: 199.6°   Direction: South-South-West

HR420 is a giant star in the constellation of Hydrus.

HR420 visual magnitude is 5.93. Because of its reltive faintness, HR420 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 HR420 is 0.023 arcsec per year in Right Ascension and -0.019 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR420 star
DSS2 image of HR420. The red arrow shows the motion of HR420 during the next 10000 years (3.83 arcmin in Right Ascension and -3.17 arcmin in declination);

Key facts about HR420


HR420 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -30.3°
Azimuth: 199.6°
Direction: South-South-West

Celestial coordinates and finder chart of HR420

HR420 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 HR420 are provided in the following table:

01h 25m 05s
-64° 22’ 09”

The simplified sky map below shows the position of HR420 in the sky:

Finder chart HR420 star
Simplified finder chart for HR420.

Visibility of HR420 from your location

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

HR420 is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of HR420 from the Sun and relative movement

HR420 is distant 1,009.29 light years from the Sun and it is moving far from the Sun at the speed of 23 kilometers per second.

309.60 pc
1,009.29 ly
23 km/s
0.023 arcsec/year
-0.019 arcsec/year

Spectral properties of HR420

HR420 belongs to spectral class K5 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR420 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR420. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR420