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Old 30-08-2018, 12:43 PM
Tropo-Bob (Bob)
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Tropo-Bob is offline
 
Join Date: Sep 2013
Location: Cairns
Posts: 1,584
ARA - The Grand Tour

I have found a nearby, dark observing spot, which is only about 10 minutes from my home. I hope to give it a go tonight by viewing several objects in Ara. The weather looks poor at the moment, but was the same yesterday, however, that came good for a few hours in the early evening.

Below are the subjects in Ara that I wish to view:-


Objects of interest

NGC 6362 is a globular cluster that is a puzzle because it has more blue stars than expected.
https://en.wikipedia.org/wiki/NGC_6362
Ice in Space images & posts: http://www.iceinspace.com.au/forum/s....php?p=1368181


NGC 6215 & NGC 6221 are a pair of galaxies in the one field of view. There is a hydrogen 'bridge' between the two galaxies.
https://en.wikipedia.org/wiki/NGC_6215
https://en.wikipedia.org/wiki/NGC_6221
Ice in Space images & posts: http://www.iceinspace.com.au/forum/s...=158298&page=2


NGC 6193 is an open cluster, which is about the size of the full Moon. There is a nearby nebula that is usually seen only by imaging.
https://en.wikipedia.org/wiki/NGC_6193
Ice in Space images & posts: http://www.iceinspace.com.au/forum/s...ad.php?t=84999


Brs13 is a double star with Mag 5.8 & 8.5. Separation is 8.3" (17h19; -46.38)


h4949 is a showpiece double according to Haas in Double Stars for Small Telescopes. Its pair is mag 5.6 & 6.5 with a separation of 2.1". (17h26; -45.51)


Beyond the range of my scopes is Westerlund 1. It is described as a supercluster that may be evolving into a globular. One of its stars, Westerlund 1-26 has been said to be the largest (by volume) star know.
https://en.wikipedia.org/wiki/Westerlund_1
https://en.wikipedia.org/wiki/Westerlund_1-26



The Main Stars

Alpha Arae is about 10 Solar Masses and 6000 times as brighter than Sol.
https://en.wikipedia.org/wiki/Alpha_Arae

Beta Arae is transforming from a giant to a supergiant star.
https://en.wikipedia.org/wiki/Beta_Arae

Gamma Arae is akin to being a more distant Rigel. Both stars give of about 120,000 times the energy of our Sun.
https://en.wikipedia.org/wiki/Gamma_Arae

Delta Arae has a physic like me, it has a pronounced bulge at the equator.
https://en.wikipedia.org/wiki/Delta_Arae

Epsilon Arae is actually two stars, E1 & E2.
EI https://en.wikipedia.org/wiki/Epsilon1_Arae
E2 https://en.wikipedia.org/wiki/Epsilon2_Arae


Note. I do not report on the already well-known Messier and Caldwell objects, but these are those in Ara:
Messiers: Nil
Caldwell: 81 & 82.

Last edited by Tropo-Bob; 30-08-2018 at 09:53 PM.
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