Open Cluster
Messier 35
Shoe-Buckle Cluster

Object :	M35 (NGC 2168)
Coordinates/Direction :	RA: 06h08m, DEC: +24^o20'
Object size :	28'
Apparent magnitude :	5.3
Distance :	2970 ly
No solar mass :	1.6e³
Radius :	11 ly
Discovered by :	Philippe Loys de Cheseaux, year 1745
Find in constellation :	Gemini
More to know :	Wikipedia: https://en.wikipedia.org/ wiki/ Messier_35

(click on the image to get a full resolution photo in a new window)

Date :	2013-10-13
Time (UT) :	00:43 to 00:59

Mount :

Lens/telescope :	Newton 10" 1200mm f/4.7 (1090mm, f/4.3)
Corrector/Barlow :	2" coma corrector, x0.9. T42 connector to camera
Field (FOV) :	1.88 x 1.26^o (full frame) before crop

camera :	Canon 5D Mk I, QE=0.25, full frame, 12 Mpixel, 12 bit
camera temperature:	About 3^o C above surrounding temperature
Film/CCD :	Raw, Cr2
Filter :	none

Control system :

Mount by EQMOD, camera by APT, ASCOM Windows PC

Exp. time :	22x30 seconds at 1000iso
Image process tool :	Siril, Gimp, IrfanView
Processing :	synthetic bias calibration
Weather :	Moon Phase 66%, Temperature 0^oC, rel Humidity -%

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 of few photos I took with this big Newton telescope, very sharp but too bulky to have on the balcony.

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