Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]

η Capricorni (eta Capricorni)

η Capricorni is a double main-sequence star in the constellation of Capricornus.

η Capricorni visual magnitude is 4.84. Because of its moderate brightness, η Capricorni should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about η Capricorni:

4.84
Main-sequence
η Capricorni (eta Capricorni) is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of η Capricorni

η 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 η Capricorni are provided in the following table:

21h 04m 24s
-19° 51’ 18”
28.05°
-37.86°
Capricornus

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

Finder chart η Capricorni (eta Capricorni) star
Simplified finder chart for η Capricorni (eta Capricorni).

Visibility of η Capricorni from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's η Capricorni (eta Capricorni) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 109.9°
Max altitude: 18.7°
Azimuth: 250.1°
η Capricorni (eta Capricorni) is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of η Capricorni

The image below is a photograph of η Capricorni 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 η Capricorni is -0.034 arcsec per year in Right Ascension and -0.037 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of η Capricorni (eta Capricorni) star
DSS2 image of η Capricorni. The red arrow shows the motion of η Capricorni during the next 10000 years (-5.67 arcmin in Right Ascension and -6.17 arcmin in declination);

Distance of η Capricorni from the Sun and relative movement

η Capricorni is distant 157.95 light years from the Sun and it is moving far from the Sun at the speed of 24 kilometers per second.

48.45 pc
157.95 ly
24 km/s
-0.034 arcsec/year
-0.037 arcsec/year

Spectral properties of η Capricorni

η Capricorni belongs to spectral class A5 and has a luminosity class of V corresponding to a main-sequence star.

1.41
A5V
8403K

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

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

η Capricorni star system properties

η Capricorni is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the η Capricorni double sysyem:

4.84
6.14
1.3
0.3 arcsec

Alternative designations of η Capricorni

η Capricorni
(eta Capricorni)
22 Capricorni
SAO189986
SAO189986
Gl 816.2A