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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: 6:46  
clear_day Transit: 12:11  
SunsetSet: 17:36
sleep NighttimeWhat's Visible Now?
All Constellations » Hydra » 

HR4542

Altitude: -17.5°   Azimuth: 112.0°   Direction: East-South-East

HR4542 is a giant star in the constellation of Hydra.

HR4542 visual magnitude is 6.48. Because of its reltive faintness, HR4542 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 HR4542 is -0.087 arcsec per year in Right Ascension and 0.01 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4542 star
DSS2 image of HR4542. The red arrow shows the motion of HR4542 during the next 10000 years (-14.50 arcmin in Right Ascension and 1.67 arcmin in declination);

Key facts about HR4542

6.48
Giant

HR4542 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -17.5°
Azimuth: 112.0°
Direction: East-South-East

Celestial coordinates and finder chart of HR4542

HR4542 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 HR4542 are provided in the following table:

11h 50m 37s
-27° 16’ 40”
286.67°
33.67°
Hydra

The simplified sky map below shows the position of HR4542 in the sky:

Finder chart HR4542 star
Simplified finder chart for HR4542.

Visibility of HR4542 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 HR4542 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: 117.3°
Max altitude: 11.2°
Azimuth: 242.7°

Distance of HR4542 from the Sun and relative movement

HR4542 is distant 495.44 light years from the Sun and it is moving towards the Sun at the speed of 3 kilometers per second.

151.98 pc
495.44 ly
-3 km/s
-0.087 arcsec/year
0.01 arcsec/year

Spectral properties of HR4542

HR4542 belongs to spectral class G8 and has a luminosity class of III corresponding to a giant star.

0.57
G8III
4791K

The red dot in the diagram below shows where HR4542 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4542. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4542

SAO180232
SAO180232