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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: -70.9°   Azimuth: 344.6°   Direction: North-North-West

HR4458 is a hypergiant star in the constellation of Hydra.

HR4458 visual magnitude is 5.98. Because of its reltive faintness, HR4458 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 HR4458 is -0.674 arcsec per year in Right Ascension and 0.826 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR4458 star
DSS2 image of HR4458. The red arrow shows the motion of HR4458 during the next 1000 years (-11.23 arcmin in Right Ascension and 13.77 arcmin in declination);

Key facts about HR4458


HR4458 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -70.9°
Azimuth: 344.6°
Direction: North-North-West

Celestial coordinates and finder chart of HR4458

HR4458 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 HR4458 are provided in the following table:

11h 34m 29s
-32° 49’ 53”

The simplified sky map below shows the position of HR4458 in the sky:

Finder chart HR4458 star
Simplified finder chart for HR4458.

Visibility of HR4458 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 HR4458 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: 122.8°
Max altitude: 5.7°
Azimuth: 237.2°

Distance of HR4458 from the Sun and relative movement

HR4458 is distant 31.10 light years from the Sun and it is moving towards the Sun at the speed of 23 kilometers per second.

9.54 pc
31.10 ly
-23 km/s
-0.674 arcsec/year
0.826 arcsec/year

Spectral properties of HR4458

HR4458 belongs to spectral class K0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where HR4458 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4458. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4458

Gl 432 A