M54 (Kurt Zeppetello)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: M 54 · NGC 6715

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M54

Link: http://kurt-zeppetello.blogspot.com/

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M54

Link: http://kurt-zeppetello.blogspot.com/

M54, M55, and M75 represent the last three Messier objects in Sagittarius (that I captured for my catalog). M54 and M75 are both very small resembling a big star more than a globular cluster. In fact I thought my go to was out of whack when it took me to M54. I spent about 20 minutes verifying I was on it.

M54 was thought to belong to the Milky Way, however (1994 research), it turns out that M54 belongs to the Sagittarius Dwarf Elliptical Galaxy making it the first globular cluster formerly thought to be part of our galaxy. M54 is approximately 87,000 light-years from Earth and has a radius of 150 light-years across. It is one of the denser of the globulars, however, not resolvable into individual stars even with larger amateur telescopes (source: wikipedia).

https://kurtzeppetello.smugmug.com/

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Status	Advanced success
Started	...
Astrometry.net job	1681934
PixInsight job	RMNAP2BBR8YVTOGXQLXD8E9AW0R7LDTJ
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	18h55m05s.69
RA (top/left)	18h50m17s.72
RA (top/right)	18h59m38s.43
RA (bottom/right)	18h59m49s.41
RA (bottom/left)	18h50m37s.25

Dec (center)	-30°28′31″.6
Dec (top/left)	-31°09′21″.9
Dec (top/right)	-31°14′03″.2
Dec (bottom/right)	-29°46′54″.6
Dec (bottom/left)	-29°42′24″.10

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