The Celestial Sphere from Latitude 30° South

2100 Hours Sidereal Time

The sky from 30°S at 2100 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 2100 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

There is little of interest to see in the southeast at this time. The river Eridanus is rising in the southeast with its brightest star, Achernar, already well up. Near Achernar flies a flock of stellar birds, Phoenix, Grus and Tucana. The bright star just east of zenith is Fomalhaut in Piscis Austrinus.

A swathe of bright stars runs from the southern horizon westward. The 'Southern Cross' or Crux is brilliantly lit near in the horizon whilst higher up are the two brightest stars in Centaurus, Rigil Kentaurus and Hadar. Rigil Kentaurus is the closest star to the Sun, hence its brightness. Also near these two stars is the large and easy-to-locate Triangulum Australe with the peacock Pavo just above. The string of bright stars continues through Lupus and up into Scorpius due west. Red Antares, the 'Rival of Mars', marks the heart of the scorpion.

Looking North

The northwest is devoid of bright objects, with Ophiuchus just beginning to set. Higher up is the teapot-shaped zodiacal constellation of Sagittarius which marks the direction of the centre of our galaxy. The three bright stars marking the northern hemisphere asterism, the 'Summer Triangle', are visible in the north and northwest. Deneb in Cygnus is almost due north with Lyra's blue Vega to the west and Altair in Aquila well-placed for observing higher in the sky. Tiny Delphinus, a kite-shaped figure, lies due north just next to Aquila.

Aquarius is proceeding west. Capricornus, a triangular constellation, is at zenith whilst Pegasus gallops along the northern horizon just below Aquarius. The easiest part of Pegasus to see is the asterism of the 'Great Square'.

Like the west, the eastern skies lack bright objects, with the large but faint constellations of Pisces and Cetus just rising.