Globular Cluster
Messier 53

Object :	M53 (NGC 5024)
Coordinates/Direction :	RA: 13h12m, DEC: +18^o10'
Object size :	13'
Apparent magnitude :	7.6
Distance :	58 kly
No solar mass :	8.26e⁵
Radius :	19 ly
Discovered by :	Johan Elert Bode, year 1775
Find in constellation :	Coma Berenices
More to know :	Wikipedia: https://en.wikipedia.org/ wiki/ Messier 53

M53, 2020-03-20

Date :	2020-03-20
Time (UT) :	23:55 to 00:15

Mount :

SkyWatcher EQ6 Pro, Beltdrive (DIY 2019)

Guide :

QHY5 camera with 400 mm f/6.3 lens

Lens/telescope :	TS130 APO f/7 910mm, 3" focuser
Corrector/Barlow :	3" field flatter, 1.0x
Field (FOV) :	2.25 x 1.5^o (full frame) before crop

camera :	Canon 6D, QE=0.5, full frame, 20 Mpixel, 14 bit
camera temperature:	About 6^o C above surrounding temperature
Film/CCD :	Raw, Cr2
Filter :	none

Control system :

Mount by EQMOD, camera by APT, guide by PHD2, focuser by USB-focus, ASCOM Windows PC

Exp. time :	93x60 seconds, ISO1600, dithering mode
Image process tool :	AstroImageJ, Fitswork, IrfanView
Processing :	demosaic, synthetic flat calibrated, hot pixel removed by dithering, level
Weather :	clear with drifting clouds

Site :

Sweden, Stockholm, Hagsätra. Bortle 9
Free view Az: 20^o to 90^o, 165^o to 185^o, Alt: 20^o to 55^o

Comment :

One more object in Southern direction. This is M53, a globular cluster and it's 58'000 light years far away. Compare with the Hubble image on the link above, it's a difference but I took this from our balcony !

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Globular Cluster Messier 53

M53, 2020-03-20

Globular Cluster
Messier 53