Telescopium

Tel · genitive Telescopii · southern sky

The Telescopium figure as the IAU defines it, drawn looking south with east to the left — the orientation you see standing outside.

At a glance

Catalogued stars
56
Visible to the eye
56 stars
Brightest star
Alp Tel (3.49)
Best seen
June
Declination span
-49.1° to -46.0°
Nearest star
HD 190422 · 76.4 ly

Visible from everywhere south of about 41°N.

When and where to look for Telescopium

Telescopium crosses the meridian — its highest point in the sky — at local midnight around June, which makes the months from May to July the easiest time to find it in the evening. It spans declinations -49.1° to -46.0°, so visible from everywhere south of about 41°N.

The quickest way to find it is to open the live AR sky map and point your phone at the sky — if Telescopium is above your horizon right now, its figure is drawn in the position it genuinely occupies above you.

Brightest stars in Telescopium

StarMagTypeDistance
Alp Tel3.49B3IV277.8 ly
Zet Tel4.10G8/K0III126.2 ly
Eps Tel4.52G5III418.1 ly
Lam Tel4.85A0V611.9 ly
Iot Tel4.88G9III370.6 ly
Del1Tel4.92B6IV707.5 ly

Magnitude runs backwards: lower numbers are brighter, and anything below about 6.5 is beyond the naked eye under a dark sky.

What Telescopium is made of

The catalogue lists 56 stars within Telescopium, of which 56 are magnitude 6.5 or brighter — the limit of what an unaided eye picks up under a genuinely dark sky. The rest need binoculars or a telescope.

Spectral make-up

B8
A11
F6
G10
K16
M5

Spectral class is a temperature ordering, running from O at around 30,000 K down to M below 3,500 K. A constellation is a direction, not a group, so this is simply what happens to lie along that line of sight.

The closest catalogued star in this direction is HD 190422 at 76.4 light years. The most distant is HD 174430 at roughly 1,394 light years — stars that appear side by side here are nothing of the sort.

Nearby constellations