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Old 12-05-2024, 09:33 PM
TrevorW
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Iota's Ghost

NGC5102 4hr48minutes captured last night Bortle 6 skies,a tough target to process nicely as it is a diffuse, mag 9.65 galaxy hiding in the glare of the much closer (approx 59 light years) Iota Centauri, a star of magnitude 2.75


This is a lenticular galaxy in the Centaurus A/M83 Group of galaxies. It was discovered by John Herschel in 1835.



Distance measurements

At least two techniques have been used to measure the distance to NGC 5102. The surface brightness fluctuations distance measurement technique estimates distances to spiral galaxies based on the graininess of the appearance of their bulges. The distance measured to NGC 5102 using this technique is 13.0 0.8 Mly (4.0 0.2 Mpc). However, NGC 5102 is close enough that the tip of the red giant branch (TRGB) method may be used to estimate its distance. The estimated distance to NGC 5102 using this technique is 11.1 1.3 Mly (3.40 0.39 Mpc). Averaged together, these distance measurements give a distance estimate of 12.1 0.7 Mly (3.70 0.23 Mpc).
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  #2  
Old 12-05-2024, 09:50 PM
Startrek (Martin)
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Trevor,
Nice work from your humble 8 scope on a faint galaxy
Those diffraction spikes are an eye opener too !!
Your galaxy images are top notch
Well done !!
Martin
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Old 12-05-2024, 10:06 PM
TrevorW
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This is from my 10" GSO RC, Martin, Thanks
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Old 12-05-2024, 10:14 PM
Startrek (Martin)
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Quote:
Originally Posted by TrevorW View Post
This is from my 10" GSO RC, Martin, Thanks
Apologies , your 10 RC

No wonder the diffraction spikes are whoppers

Martin
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Old 13-05-2024, 11:12 AM
Dave882 (David)
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Nice one Trevor. Not sure I've seen this one before. Those bright stars really set the scene!
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Old 13-05-2024, 12:44 PM
Bodon (Steve)
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Wow really nice!
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Old 13-05-2024, 07:40 PM
TrevorW
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ThANKS David and Steve
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Old 13-05-2024, 07:50 PM
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strongmanmike (Michael)
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I hardly know a single iota about this one Trevor
Very cool being so close to such a bright star, yoiu've done well to show it so well

Mike
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Old 14-05-2024, 11:55 PM
TrevorW
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Thanks Mike
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