August
Indus (Ind), Pavo (Pav),
Telescopium (Tel)
Indus (pronounced in-dus) the American Indian, was included in Bayer's Uranometria of 1603. The constellation is rather inconspicuous and it's brightest star is 3rd magnitude. There is little of interest for the casual observer in Indus with the possible exception of the binary star known as "Theta Indi". The components are magnitude 4.5 and 7 and are an attractive yellow and red in colour, seperated by 6 arc seconds.
Pavo (pronounced pah-voe) the Peacock, was introduced as a constellation in 1603 by German astronomer Johann Bayer in his Uranometria. Bayer's work was the first set of star charts where star positions were plotted accurately, and was based on observations of Danish astronomer Tycho Brahe. Pavo is circumpolar from latitude 35º and further south, culminating (ie.at its highest point) at the end of August at 9pm. The constellation's southern boundary joins that of Octans and is about 15º from the South Celestial Pole. Interestingly, Pavo shares the southern skies with four other exotic celestial birds, Apus - the bird of paradise, Grus - the crane, Phoenix - the phoenix and Tucana - the toucan.
The southern skies are graced
with some of the finest globular clusters in the sky, and Pavo is blessed
with one of them, NGC 6752 or Dunlop 295. Small telescopes will show delicate
strings of stars eminating from the condensed centre. Although not an official
name, some local amateur astronomers have appropriately dubbed NGC 6752
as the "Starfish Cluster'. From a subjective viewpoint the globular clusters
47 Tucanae, Omega Centauri and NGC 6656 or M22 in Sagittarius and NGC 6752
are probably some of the best examples of this class of object (a bit of
southern bias here, an rightly so if you have ever seen any of these objects).
Unmatched in elegance and beauty, these 'globulars' are particulaarly well
suited to small and medium apertures.
The constellation is quite
faint with no star brighter than 2nd magnitude. The brightest star Alpha
Pavonis (or Peacock) is 2.12 magnitude but most prominent stars are around
3rd / 4th magnitude.
Pavo has a number of
double and multiple stars, and virtually all are below naked eye visibility.
One exception is Xi Pavonis, which is a colourful 4th magnitude orange
star with an 8th magnitude companion in an excellent field. Many of the
fainter pairs are worth tracking down. There are some real exquisite gems
like Rmk25 (two 8th magnitude stars seperated by 7.2 arc seconds) and Rmk
26 (two equal 6.5 magnitude stars 2.3 arc seconds apart).
Telescopium (pronounceed tel-es-koe-pee-um)
is another of those faint and insignificant constellation that were introduced
by the French astronomer Nicolas Lacaille in 1752. He named it Tubus Astronomicus.
As its name implies the constellation is meant to represent a telescope,
but it bears little resemblance to one and very few amateurs would ever
bother to point their telescopes towards this constellation. To Be fair,
there is one object of note, the very pretty double star known as Dunlop
227. At 6.1 and 6.8 magnitude, the orange and white pair are seperated
by 23 arc seconds.
Information sourced by
Quasar Publishing.P.O Box 85 Georges Hall NSW 2198