[7299] zeta Sagittarii, also known as Ascella ("armpit"), is the third brightest star in the constellation. It is a double star about 90 light-years distant. Its components are a white giant and a subgiant.
ASCELLA (Zeta Sagittarii). At bright third magnitude (2.63) and beautifully prominent because of its location, Ascella makes the lip of the Little Milk Dipper of Sagittarius.
and AT Mic AB 20:41:51.2-32:26:6.8 ICRS 2000.0) of Constellation Microscopium, the Microscope -- northwest of Alpha Microscopii, southwest of Omega Capricorni, south of Dabih (Beta1,2 Capricorni), and east of Ascella (Zeta Sagittarii).
This object's close proximity to Zeta Sagittarii, the southernmost star in the constellation, makes it very easy to find. Although this cluster is bright, it is small. It could be mistaken for a star in binoculars.
Ascella Zeta Sagittarii
Asellus Australis Delta Cancri
Asellus Borealis Gamma Cancri
Asellus Primus Theta Bootis
Asellus Secundus Iota Bootis
Asellus Tertius Kappa Bootis
Ashlesha Epsilon Hydrae
Askella Zeta Sagittarii
Aspidiske Iota Carinae ...
The easiest way of finding the nebulosity is to drop seven and a half degrees south of zeta Sagittarii.
A printed version of this web site ["The Constellations Pocket Guide"] is available, covering all 88 constellations and their graphics.
The word Kaus comes from the Arabic al-qaus, ‘the bow', while the suffixes are Latin words signifying the middle, southern and northern parts of the bow. Zeta Sagittarii is Ascella, a Latin word meaning ‘armpit'.
 See also: Star, Sagitta, Sky, Constellation, Nebula
  
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