Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:44  
clear_day Transit: 12:57  
SunsetSet: 21:11 south
sunny DaytimeWhat's Visible Now
All Constellations » Hydra » 


Altitude: -59.2°   Azimuth: 318.4°   Direction: North-West

HR4558 is a giant star in the constellation of Hydra.

HR4558 visual magnitude is 5.3. Because of its reltive faintness, HR4558 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about HR4558:


HR4558 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -59.2°
Azimuth: 318.4°
Direction: North-West

Celestial coordinates and finder chart of HR4558

HR4558 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 HR4558 are provided in the following table:

11h 54m 42s
-25° 42’ 50”

The simplified sky map below shows the position of HR4558 in the sky:

Finder chart HR4558 star
Simplified finder chart for HR4558.

Visibility of HR4558 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 HR4558 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: 115.7°
Max altitude: 12.8°
Azimuth: 244.3°
HR4558 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR4558

The image below is a photograph of HR4558 from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of HR4558 is 0.048 arcsec per year in Right Ascension and 0.081 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4558 star
DSS2 image of HR4558. The red arrow shows the motion of HR4558 during the next 10000 years (8.00 arcmin in Right Ascension and 13.50 arcmin in declination);

Distance of HR4558 from the Sun and relative movement

HR4558 is distant 294.76 light years from the Sun and it is moving towards the Sun at the speed of 11 kilometers per second.

90.42 pc
294.76 ly
-11 km/s
0.048 arcsec/year
0.081 arcsec/year

Spectral properties of HR4558

HR4558 belongs to spectral class G4 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR4558 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4558. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4558