The Celestial Sphere from Latitude 30° South

2300 Hours Sidereal Time

The sky from 30°S at 2300 hours sidereal time

This page contains a description of the stars, constellations, and deep-sky objects that can be seen in the sky at around 2300 hours sidereal time. It is assumed that the observer is located at approximately 30° latitude south.

To use the sky map, orient it so that the direction you are facing is at the bottom of the map. Zenith, the point directly overhead in the sky, is located at the centre of the map.

Looking South

Eridanus is now fully above the eastern horizon. This long, winding constellation terminates high in the south with the bright star Achernar. Below Achernar is another bright star. This is Canopus in Carina, the keel of the ship that carried Jason and his Argonauts to fame in mythology. Many bright objects can be found near the horizon. Almost due south is the setting Crux and that is followed by the two brightest stars of Centaurus, Rigil Kentaurus and Hadar. In fact, Rigil Kentaurus is bright only because it is so near; after the Sun, Rigil Kentaurus is the closest star to the Earth.

Continuing westward along the horizon is Lupus snapping at the heels of Centaurus. The zodiacal constellation Scorpius is setting in the west with red Antares marking out the heart of the scorpion. Finally, following Scorpius at a slightly higher altitude is Sagittarius, a teapot-shaped constellation and another member of the zodiac.

Fainter constellations dominate the skies away from the horizon. Near Achernar, high in the south, fly Phoenix, Grus and Tucana. Further west is the peacock, Pavo, and between it and the two bright stars of Centaurus is the highly visible Triangulum Australe, a much more impressive sight than its northern hemisphere counterpart.

Looking North

Bright Vega has set, leaving its northern hemisphere 'Summer Triangle' compatriots Altair in Aquila and Deneb in Cygnus in an otherwise empty northwestern sky. Tiny Delphinus accompanies them. Following the dolphin is the flying horse Pegasus, easily identified by its 'Great Square'.

Higher in the northern sky above Delphinus is the triangular Capricornus which is followed by its zodiacal neighbour Aquarius. Another watery zodiacal constellation, Pisces, lies between Aquarius and Pegasus. Although faint, the 'Circlet' of stars in Pisces just above the 'Great Square' is easy to find. The zenith marked by Fomalhaut of Piscis Austrinus.

Like the western skies, the east does not offer any bright objects. Only Cetus, Aries, and Triangulum are above the horizon.