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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: 5:39  
clear_day Transit: 12:56  
SunsetSet: 20:14
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All Constellations » Telescopium » 

α Telescopii (alpha Telescopii)

Altitude: -18.8°   Azimuth: 142.4°   Direction: South-East

α Telescopii is a sub-giant star in the constellation of Telescopium.

α Telescopii visual magnitude is 3.51. Because of its moderate brightness, α Telescopii should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of α Telescopii is -0.016 arcsec per year in Right Ascension and -0.054 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of α Telescopii (alpha Telescopii) star
DSS2 image of α Telescopii. The red arrow shows the motion of α Telescopii during the next 10000 years (-2.67 arcmin in Right Ascension and -9.00 arcmin in declination);

Key facts about α Telescopii

3.51
Sub-giant

α Telescopii (alpha Telescopii) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -18.8°
Azimuth: 142.4°
Direction: South-East

Celestial coordinates and finder chart of α Telescopii

α Telescopii 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 α Telescopii are provided in the following table:

18h 26m 58s
-45° 58’ 05”
348.67°
-15.18°
Telescopium

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

Finder chart α Telescopii (alpha Telescopii) star
Simplified finder chart for α Telescopii (alpha Telescopii).

Visibility of α Telescopii from your location

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

α Telescopii (alpha Telescopii) is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of α Telescopii from the Sun and relative movement

α Telescopii is distant 249.24 light years from the Sun

76.45 pc
249.24 ly
-0.016 arcsec/year
-0.054 arcsec/year

Spectral properties of α Telescopii

α Telescopii belongs to spectral class B3 and has a luminosity class of IV corresponding to a sub-giant star.

-0.91
B3IV
12902K

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

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

Alternative designations of α Telescopii

α Telescopii
(alpha Telescopii)
SAO229023
SAO229023