glenc
24-08-2006, 05:54 AM
Which Nebulae Are Visible
We have magnitudes for open clusters, globular clusters, planetary nebulae and galaxies, but no magnitudes for most emission and reflection nebulae.
Which nebulae are visible in a 10” Dobsonian telescope? Last night I looked at 19 of them between 11 pm and 1 am.
The list below puts them into categories based on their brightness. A Lumicon UHC filter and 26 mm Plossl were used for most of them. The UHC was not used on the reflection nebula marked R.
Very bright (for a nebula)
M8, M17, M16
Bright
M20, N7000, N6960 & N6992-5
Moderately bright
N6995 R, IC 4628, N6726 R
Faint
IC1318, N6559, N6357, N6334, N6188, Fleming's wisp in the Veil neb*
Very faint
IC 5067, N6888, N6604
Have you seen these nebulae?
Do you agree with my brightness estimates?
* Pickering's Wedge was discovered in 1904 by Williamina Fleming of Harvard College. Fleming was examining photographic plates of the region around 52 Cygni when she noticed a triangular wispy patch of nebulosity. As was the custom of the day, credit for the discovery went to her supervisor, astronomer E. C. Pickering.
http://hometown.aol.com/billferris/pwedge.html
But I think it should be called Fleming's wisp.
We have magnitudes for open clusters, globular clusters, planetary nebulae and galaxies, but no magnitudes for most emission and reflection nebulae.
Which nebulae are visible in a 10” Dobsonian telescope? Last night I looked at 19 of them between 11 pm and 1 am.
The list below puts them into categories based on their brightness. A Lumicon UHC filter and 26 mm Plossl were used for most of them. The UHC was not used on the reflection nebula marked R.
Very bright (for a nebula)
M8, M17, M16
Bright
M20, N7000, N6960 & N6992-5
Moderately bright
N6995 R, IC 4628, N6726 R
Faint
IC1318, N6559, N6357, N6334, N6188, Fleming's wisp in the Veil neb*
Very faint
IC 5067, N6888, N6604
Have you seen these nebulae?
Do you agree with my brightness estimates?
* Pickering's Wedge was discovered in 1904 by Williamina Fleming of Harvard College. Fleming was examining photographic plates of the region around 52 Cygni when she noticed a triangular wispy patch of nebulosity. As was the custom of the day, credit for the discovery went to her supervisor, astronomer E. C. Pickering.
http://hometown.aol.com/billferris/pwedge.html
But I think it should be called Fleming's wisp.