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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: 6:08  
clear_day Transit: 12:59  
SunsetSet: 19:51
sunny DaytimeWhat's Visible Now?
All Constellations » Capricornus » 

30 Capricorni

Altitude: 19.7°   Azimuth: 192.7°   Direction: South-South-West

30 Capricorni is a giant star in the constellation of Capricornus.

30 Capricorni visual magnitude is 5.43. Because of its reltive faintness, 30 Capricorni 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 30 Capricorni is 0.017 arcsec per year in Right Ascension and -0.002 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 30 Capricorni star
DSS2 image of 30 Capricorni. The red arrow shows the motion of 30 Capricorni during the next 10000 years (2.83 arcmin in Right Ascension and -0.33 arcmin in declination);

Key facts about 30 Capricorni


30 Capricorni is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 19.7°
Azimuth: 192.7°
Direction: South-South-West

Celestial coordinates and finder chart of 30 Capricorni

30 Capricorni is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 30 Capricorni are provided in the following table:

21h 17m 57s
-17° 59’ 07”

The simplified sky map below shows the position of 30 Capricorni in the sky:

Finder chart 30 Capricorni star
Simplified finder chart for 30 Capricorni.

Visibility of 30 Capricorni 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 30 Capricorni 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: 108.0°
Max altitude: 20.5°
Azimuth: 252.0°

Distance of 30 Capricorni from the Sun and relative movement

30 Capricorni is distant 579.04 light years from the Sun and it is moving towards the Sun at the speed of 11 kilometers per second.

177.62 pc
579.04 ly
-11 km/s
0.017 arcsec/year
-0.002 arcsec/year

Spectral properties of 30 Capricorni

30 Capricorni belongs to spectral class B8 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 30 Capricorni is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 30 Capricorni. Attribution: Richard Powell / CC BY-SA

Alternative designations of 30 Capricorni

30 Capricorni