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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
north SunriseRise: 7:37  
clear_day Transit: 11:46  
SunsetSet: 15:55 south
sunny DaytimeWhat's Visible Now?
All Constellations » Hydra » 


Altitude: -45.0°   Azimuth: 272.1°   Direction: West

HR4503 is a multiple giant star in the constellation of Hydra.

HR4503 visual magnitude is 5.22. Because of its reltive faintness, HR4503 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 HR4503:


HR4503 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -45.0°
Azimuth: 272.1°
Direction: West

Celestial coordinates and finder chart of HR4503

HR4503 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 HR4503 are provided in the following table:

11h 41m 44s
-32° 29’ 58”

The simplified sky map below shows the position of HR4503 in the sky:

Finder chart HR4503 star
Simplified finder chart for HR4503.

Visibility of HR4503 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 HR4503 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: 122.5°
Max altitude: 6.0°
Azimuth: 237.5°

Digitized Sky Survey image of HR4503

The image below is a photograph of HR4503 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 HR4503 is 0.004 arcsec per year in Right Ascension and -0.042 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4503 star
DSS2 image of HR4503. The red arrow shows the motion of HR4503 during the next 10000 years (0.67 arcmin in Right Ascension and -7.00 arcmin in declination);

Distance of HR4503 from the Sun and relative movement

HR4503 is distant 429.51 light years from the Sun and it is moving far from the Sun at the speed of 34 kilometers per second.

131.75 pc
429.51 ly
34 km/s
0.004 arcsec/year
-0.042 arcsec/year

Spectral properties of HR4503

HR4503 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 HR4503 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4503. Attribution: Richard Powell / CC BY-SA

HR4503 star system properties

HR4503 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR4503 double sysyem:

67 arcsec

Alternative designations of HR4503