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M1: Crab Nebula in Taurus

RA = 5 hrs34 min; Dec = 22 deg 01 min.

Date & Site:

November 7, 2015; Anza Borrego Desert, CA

Conditions: calm; excellent seeing; temps in the low 30's


Telescope: DSI RC10C (fl=1867mm at f/7.3

Mount: AP1100 GOTO-CP3
Camera: ST-10XME; CFW10; Hutech OAG5 with autoguider

Astrodon RGB filters and 3nm Ha filter


Exposures: 2 hrs of Ha (15 min subs); 1 hr lum (10 min sub) and 45 min each of RGB (5 min subs) for a total of 5.25 Hrs.

M1 is a supernova remnant. Chinese astronomers first recorded this supernova in 1054; however, its remnant was not observed until 1731 by English astronomer John Bevis. This remnant houses a neutron star or pulsar which is spinning (pulsating) at a rate of 30.2 x per second emitting radiation from gamma and radio waves (Source: Wikipedia).

Since this supernova event in 1054, there have been only 4 supernovae in our galaxy.

Located about 6,500 light years it is expanding at a rate of 1,500 km/second

Field of View = 23 x 15 arc minutes

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