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NGC 2153 image

bw All Messages By This Member #28754 This is an image of NGC 2158, a dense open cluster that could be imaged in a short amount of time during tough winter conditions in New Mexico.??? Once thought to be a globular cluster because of its size and density, it is now known to be an intermediate-age, metal-poor open cluster that is a member of the old thin disk population.? Most open clusters are disrupted by tidal forces in only a few million years yet this cluster is thought to be nearly 2B years old.? As a result, its original hot blue stars have evolved off the main sequence? leaving behind a redder population of stars.? The target was imaged during 3 nights in the period from Dec 2024 to Feb 2025 using a 12.5" PlaneWave scope and a QSI-640ws camera at f/8 from SkyPi? Remote Observatories.? Total LRGB integration was a short 5 hours. ? ? Thanks for looking, Bruce W.
Geof Lewis All Messages By This Member #28755 开云体育 Bruce, That's a real beauty. I am very fond of star cluster with their different star colours, which you have presented so beautifully here. It looks like a rich sprinkling of diamonds, with yellow and blue sapphires on black velvet. Geof toggle quoted message Show quoted text From: [email protected] <[email protected]> on behalf of bw via groups.io <bw_msg01@...> Sent: 19 February 2025 17:45 To: [email protected] <[email protected]> Subject: [QSI-CCD] NGC 2153 image ? This is an image of NGC 2158, a dense open cluster that could be imaged in a short amount of time during tough winter conditions in New Mexico.??? Once thought to be a globular cluster because of its size and density, it is now known to be an intermediate-age, metal-poor open cluster that is a member of the old thin disk population.? Most open clusters are disrupted by tidal forces in only a few million years yet this cluster is thought to be nearly 2B years old.? As a result, its original hot blue stars have evolved off the main sequence? leaving behind a redder population of stars.? The target was imaged during 3 nights in the period from Dec 2024 to Feb 2025 using a 12.5" PlaneWave scope and a QSI-640ws camera at f/8 from SkyPi? Remote Observatories.? Total LRGB integration was a short 5 hours. ? ? Thanks for looking, Bruce W.
Kevin Dixon All Messages By This Member #28756 Beautiful image Bruce! Clear skies, Kevin toggle quoted message Show quoted text From: "bw via groups.io" <bw_msg01@...> To: "QSI-CCD" <[email protected]> Sent: Wednesday, February 19, 2025 12:45:48 PM Subject: [QSI-CCD] NGC 2153 image This is an image of NGC 2158, a dense open cluster that could be imaged in a short amount of time during tough winter conditions in New Mexico.??? Once thought to be a globular cluster because of its size and density, it is now known to be an intermediate-age, metal-poor open cluster that is a member of the old thin disk population.? Most open clusters are disrupted by tidal forces in only a few million years yet this cluster is thought to be nearly 2B years old.? As a result, its original hot blue stars have evolved off the main sequence? leaving behind a redder population of stars.? The target was imaged during 3 nights in the period from Dec 2024 to Feb 2025 using a 12.5" PlaneWave scope and a QSI-640ws camera at f/8 from SkyPi? Remote Observatories.? Total LRGB integration was a short 5 hours. ? ? Thanks for looking, Bruce W.
bw All Messages By This Member #28758 @Kevin and Geof - thanks for the feedback! ? Bruce

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