<![CDATA[ScienceDownEast - ScienceDownEast Astrophotography - NGC 4889 (Latest images)]]> https://sciencedowneast.com/zenphoto Tue, 14 Apr 2026 15:29:43 -0300 Tue, 14 Apr 2026 15:29:43 -0300 http://blogs.law.harvard.edu/tech/rss Zenphoto RSS Generator <![CDATA[NGC_4889 Annotated (NGC 4889)]]> https://sciencedowneast.com/zenphoto/index.php?album=Galaxies/NGC.4889&image=NGC_4889-masterLight_BIN_1_8256x5504_EXPOSURE_300_00s_FILTER_Luminance_combined_RGB_autocrop_RGB_combination_DBE_Annotated1.jpg NGC_4889 Annotated
NGC 4889 (also known as Caldwell 35) is an E4 supergiant elliptical galaxy. It was discovered in 1785 by the British astronomer Frederick William Herschel I, who catalogued it as a bright, nebulous patch. The brightest galaxy within the northern Coma Cluster, it is located at a median distance of 94 million parsecs (308 million light years) from Earth. At the core of the galaxy is a supermassive black hole that heats the intracluster medium through the action of friction from infalling gases and dust. The gamma ray bursts from the galaxy extend out to several million light years of the cluster. As with other similar elliptical galaxies, only a fraction of the mass of NGC 4889 is in the form of stars. They have a flattened, unequal distribution that bulges within its edge. Between the stars is a dense interstellar medium full of heavy elements emitted by evolved stars. The diffuse stellar halo extends out to one million light years in diameter. Orbiting the galaxy is a very large population of globular clusters. NGC 4889 is also a strong source of soft X-ray, ultraviolet, and radio frequency radiation. As the largest and the most massive galaxy easily visible to Earth, NGC 4889 has played an important role in both amateur and professional astronomy, and has become a prototype in studying the dynamical evolution of other supergiant elliptical galaxies in the more distant universe. Wikipedia

PixInsight noted 685 galaxies in this image space. I'm not sure if it labelled them all.

Note: click on the image to view it at the full resolution of the uploaded image, then click again for actual size (this is a heavily cropped image so you might not be able to zoom in).

Total image time was 2 hours and 25 min.
Exposure29 x 5 min
ISO3200
CameraNikon Z7 [8856 x 5504]
Optics120mm Skywatcher Esprit on a Celestron CGX mount
GuidingZWO ASI224MC using Phd2
ControllerKstars on a MeLe Quieter 3C
Filternone
LocationLower Sackville, Nova Scotia.
Date2023-05-09
ProcessingProcessed in PixInsight.
Dynamic Background Extraction
BlurXTerminator
NoiseXTerminator
ScreenTransfer Stretch
CurvesTransformation

Date: March 26, 2025 ]]> https://sciencedowneast.com/zenphoto/index.php?album=Galaxies/NGC.4889&image=NGC_4889-masterLight_BIN_1_8256x5504_EXPOSURE_300_00s_FILTER_Luminance_combined_RGB_autocrop_RGB_combination_DBE_Annotated1.jpg Wed, 26 Mar 2025 17:50:04 -0300 <![CDATA[NGC_4889 (NGC 4889)]]> https://sciencedowneast.com/zenphoto/index.php?album=Galaxies/NGC.4889&image=NGC_4889-masterLight_BIN_1_8256x5504_EXPOSURE_300_00s_FILTER_Luminance_combined_RGB_autocrop_RGB_combination_DBE.jpg NGC_4889
NGC 4889 (also known as Caldwell 35) is an E4 supergiant elliptical galaxy. It was discovered in 1785 by the British astronomer Frederick William Herschel I, who catalogued it as a bright, nebulous patch. The brightest galaxy within the northern Coma Cluster, it is located at a median distance of 94 million parsecs (308 million light years) from Earth. At the core of the galaxy is a supermassive black hole that heats the intracluster medium through the action of friction from infalling gases and dust. The gamma ray bursts from the galaxy extend out to several million light years of the cluster. As with other similar elliptical galaxies, only a fraction of the mass of NGC 4889 is in the form of stars. They have a flattened, unequal distribution that bulges within its edge. Between the stars is a dense interstellar medium full of heavy elements emitted by evolved stars. The diffuse stellar halo extends out to one million light years in diameter. Orbiting the galaxy is a very large population of globular clusters. NGC 4889 is also a strong source of soft X-ray, ultraviolet, and radio frequency radiation. As the largest and the most massive galaxy easily visible to Earth, NGC 4889 has played an important role in both amateur and professional astronomy, and has become a prototype in studying the dynamical evolution of other supergiant elliptical galaxies in the more distant universe. Wikipedia

Note: click on the image to view it at the full resolution of the uploaded image, then click again for actual size (this is a heavily cropped image so you might not be able to zoom in).

Total image time was 2 hours and 25 min.
Exposure29 x 5 min
ISO3200
CameraNikon Z7 [8856 x 5504]
Optics120mm Skywatcher Esprit on a Celestron CGX mount
GuidingZWO ASI224MC using Phd2
ControllerKstars on a MeLe Quieter 3C
Filternone
LocationLower Sackville, Nova Scotia.
Date2023-05-09
ProcessingProcessed in PixInsight.
Dynamic Background Extraction
BlurXTerminator
NoiseXTerminator
ScreenTransfer Stretch
CurvesTransformation

Date: March 26, 2025 ]]> https://sciencedowneast.com/zenphoto/index.php?album=Galaxies/NGC.4889&image=NGC_4889-masterLight_BIN_1_8256x5504_EXPOSURE_300_00s_FILTER_Luminance_combined_RGB_autocrop_RGB_combination_DBE.jpg Wed, 26 Mar 2025 17:50:04 -0300