Your guide to the Solar System and the night sky
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🌎  Observing from: Greenwich, United Kingdom [change]
🌅 Sunrise: 5:54  ☀️ Transit: 12:05  🌅 Sunset: 18:16

η Telescopii (eta Telescopii)

η Telescopii is a hypergiant star in the constellation of Telescopium.

η Telescopii visual magnitude is 5.05. Because of its reltive faintness, η Telescopii 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 η Telescopii:

η Telescopii (eta Telescopii) is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of η Telescopii

η Telescopii is situated south of the celestial equator, as such, it is more easily visible from the southern emisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of η Telescopii are provided in the following table:

19h 22m 51s
-54° 25’ 24”

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

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

Visibility of η Telescopii from your location

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

η Telescopii (eta Telescopii) is currently not visible from Greenwich, United Kingdom [change]

Digitized Sky Survey image of η Telescopii

The image below is a photograph of η Telescopii 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 Telescopii is 0.015 arcsec per year in Right Ascension and -0.072 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of η Telescopii (eta Telescopii) star
DSS2 image of η Telescopii. The red arrow shows the motion of η Telescopii during the next 10000 years (2.50 arcmin in Right Ascension and -12.00 arcmin in declination);

Distance of η Telescopii from the Sun and relative movement

η Telescopii is distant 155.39 light years from the Sun and it is moving far from the Sun at the speed of 13 kilometers per second.

47.66 pc
155.39 ly
13 km/s
0.015 arcsec/year
-0.072 arcsec/year

Spectral properties of η Telescopii

η Telescopii belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.


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

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

Alternative designations of η Telescopii

η Telescopii
(eta Telescopii)