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Basic object information
Name: M 101
Type of object: Galaxy
Magnitude: 7.9
Surface brightness: 14.0 mag/sq arcmin
Size: 28.5'x28.3'
Object classification: SBc
Description: pB,vL,iR,g,vsmbM,BSN
Notes: P w NGC 5474;SN 1909;spir galax w one heavy arm;B knot E
Catalog position for epoch J2000.0
Right ascension: 14h 03m 12.8s
Declination: +54° 21' 02"
Constellation: Ursa Major
Observer: Iiro Sairanen
Obs. place: Base del Teide (2280m above sea level), Tenerife, Spain
Date/Time: 19/20.4.2004 1:45
Telescope: Newton 110/805mm
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Magn: 64x |
Filter: |
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Field: 47' |
NE Lim.mag: 7,0 |
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Background sky: 2 |
Seeing: 2 |
Height: 28°
Visuality: II
Weather: +11˚C, thin highclouds
Low surface brightness but hints of spiral structure were easily in view with averted vision. Knots in W, NE and SE -areas.