I've always found that the transparency dictates at what magnification you need to see all four stars of the Double Double. I think I've done it as low as 125x.

 

M22 is beautiful probably my favorite globular cluster.pretty sure it'd be naked eye,just,if it was higher for us northern hemisphere lot.its brighter than m13.im going to guess that it is the third brightest globular,after 47 tucana?well second brightest globular if Omega Centauri proves to be the remains of a dwalf Galaxy rather than a globular.

 

It's low now.

 

Not many globulars are within the grasp of the naked eye;ome Omega Centauri,47 tucana, probably m22?the rest are borderline,m13,m5,m3,m2,m15 are one's people claim to have seen naked eye.i think that I have just had m13.m5 is quite big so probably possible but M's 3,2 and 15 are too small in my view.forgot m4 that's big, reckon thats possible from the southern hemisphere?

 

I think M4 (aka Cat's Eye) is near the zenith in the southern hemisphere. It's 1.5° west of Antares. It's low for me (approaching extinction) and I only have a limited window with Antares anyway. In my experience, the brightness of Antares combined with the low altitude can often make M4 difficult to see.

 

It's low for me too.antares is my second lowest first magnitude star after formalhalt.m4 is visible with an optical aid and diffuse.i seem to recall that there's a few 5.8 to 6.3 mag.ngc globulars in the far southern skies too.i can only recall ever seeing Omega Centauri and 47 tucana naked eye on my trips south of the equator.

 

Yeah, not only is it low, it's seasonal.



Best time for me is in May or early June.

 

I believe M4 was the first globular where individual stars were resolved.

 

Scorpius has gone now from the night skies over Ireland,it never gets very high at the best of times but you can see m4 using a monocular.ill have to work out how far north you have to get before Antares never clears the horizon.im going to guess somewhere like torshaven, Faroe islands? I've seen it from aviemore halfway up Scotland(halfway not counting the Shetland islands!).I saw 47 tucana naked eye from right near Sydney about 3 years back.i was in the Sydney harbor national Park.sydney city centre is about 4 miles to the west but there's nothing to the east only ocean so its very dark that way.

 

Torshaven was a good guess,62.2 degrees north and the cut off for Antares is 63 degrees so technically it rises there but only a tad above the horizon.mind the weather was so vile when I went there, and that was in August!,that you won't see much except cloud, driving rain and the effects of strong wind! basically a sub artic place but very green.amazingly one species of palm tree,trachycarpus fortunei, the windmill palm can survive out doors there! I suspect that the winters are rather like those in Ireland and western Scotland,mild and damp but almost snow and frost free?

 

Western Scotland, and very probably the western Faroe Islands, are warmed by the Gulf Stream. The west coast of Scotland can have very warm summers and mild winters. The east coast and eastern border counties are a different matter. Winters can be quite bad in the border counties although Northumberland can have very hot summers in my experience.

 

The gulf stream and north Atlantic drift are warm currents and even go up right into the artic keeping murmansk ice free year round in Russia at well over 70 degrees north.loggerhead sea turtles have used it to get up as far as greenland.the Antarctic on the other hand only has cold currents and it has a wind that spins around it making places like punta arenas chilly year round.

 

Plus there's global warming!