w1800 20170101 M1 A7Ra ISO3200 23x60s

The Crab Nebula (catalogue designations M1, NGC 1952, Taurus A) is a supernova remnant in the constellation of Taurus.

At the center of the nebula lies the Crab Pulsar, a neutron star 28–30 kilometres (17–19 mi) across with a spin rate of 30.2 times per second,[6] which emits pulses of radiation from gamma rays to radio waves. At X-ray and gamma ray energies above 30 keV, the Crab Nebula is generally the brightest persistent source in the sky, with measured flux extending to above 10 TeV.
The inner part of the nebula is a much smaller pulsar wind nebula that appears as a shell surrounding the pulsar.

ObjectM1 - Crab Nebula (Super Nova Explosion)
Constellation: Taurus
Position: RA 05h 34m 32s DEC +22° 00′ 52″
Apparent Size: 7 × 5 arcmin
Apparent Magnitude: +8.4
Distance (average) 6500±1600 ly
Photo Datas 
Date 01.01.2017, 19:00 UTC
Location Knottenried/Oberallgäu, 1002m ASL
GPS: 47°36’13“ N, 10°11’24“ E
Sky darkness SQM-L Zenit 21.11mag/sqrsec, Object 21.04 mag/sqrsec
Ground Temp./Air Pressure -5.0°C / 1028mbar
Thermal sky temp./weather  > -60°C Zenit, clear
Seeing (Bortle)  6/10
Telescope Meade 8"SC ACF 1524mm FR f/7.5
Camera Sony A7Ra mod @ T sensor= 0.5°C
Expose frames ISO 3200, RAW 23x60s, 5 darks
Total expose
23 min.
Filter no
Mount HPS 10Micron GM 3000
Guiding Cam no
Software DSS 3.3.4, Photoshop CC

C 2017 Peter Cerveny