Zeta Aquarii (Sadaltager)

Zeta Aquarii (Sadaltager) is a double star in the constellation Aquarius, magnitude 4.3.

A close, near-equal pair at the center of the Water Jar asterism. Its components (magnitudes 4.3 and 4.5) lie 2.48″ apart at PA 150° (predicted for 2027.0 from its 427-year orbit).

When and where to see it

It is best placed in the evening sky around October, when it crosses the meridian at about 10 pm local time (around midnight in August). It sits on the celestial equator, so it can be seen from almost everywhere on Earth.

At its highest it stands 40° up from 50°N, 55° up from 35°N, 90° up from the equator, 55° up from 35°S.

Facts

Type

Double star

Constellation

Aquarius

Designations

Sadaltager, ζ Aqr, ζ¹ Aqr, Zeta¹ Aquarii, 55 Aqr, 55 Aquarii, STF 2909, HIP 110960

Magnitude

4.3

Position

RA 22h 28.8m, Dec −0° 1′ (J2000)

Open AstroPilot to see when Zeta Aquarii (Sadaltager) is highest tonight from your location, how easy it is with your telescope or binoculars, and an eyepiece view.