<![CDATA[ScienceDownEast - ScienceDownEast Astrophotography - NGC 1499 California Nebula (Latest images)]]> https://sciencedowneast.com/zenphoto Tue, 14 Apr 2026 15:48:07 -0300 Tue, 14 Apr 2026 15:48:07 -0300 http://blogs.law.harvard.edu/tech/rss Zenphoto RSS Generator <![CDATA[California Nebula 1200 secs x10 (NGC 1499 California Nebula)]]> https://sciencedowneast.com/zenphoto/index.php?album=Nebulae/California-Nebula&image=California_Nebula_FILTER_LPR_EXPTIME_1200x10_integration_DBE-full.jpg California Nebula 1200 secs x10The California Nebula (NGC 1499) is an emission nebula located in the constellation Perseus. It is so named because it appears to resemble the outline of the US State of California on long exposure photographs. It is almost 2.5° long on the sky and, because of its very low surface brightness, it is extremely difficult to observe visually. It can be observed with a Hα filter (isolates the Hα line at 656 nm) or Hβ filter (isolates the Hβ line at 486 nm) in a rich-field telescope under dark skies. It lies at a distance of about 1,000 light years from Earth. Its fluorescence is due to excitation of the Hβ line in the nebula by the nearby prodigiously energetic O7 star, Xi Persei IC 443 may be the remains of a supernova that occurred 3,000 - 30,000 years ago. IC 443 is one of the best-studied cases of supernova remnants interacting with surrounding molecular clouds.

A total of 3 hours and 20 min. exposure.
Exposure10@1200 sec
ISO800
CameraNikon Z7 [8856 x 5504]
OpticsSkywatcher Esprit 120mm Refractor
FilterRadian Triad Ultra Quad-Band Narrowband Filter
GuidingPhd2 using a ZWO 224MC on an Orion 60x240mm Guide scope
ControllerImages taken using Kstars on an Odroid-N2 (Raspberry Pi clone)
LocationLower Sackville, Nova Scotia.
Date2021-03-24
PixInsight Processing
WeightedBatchPreprocessing Script
Dynamic Crop
Automatic Background Extractor
MultiscaleLinearTransform
HistogramTransform
CurvesTransformation
LocalHistogramEquilization
Further tweaking for colour in Lightroom

Date: March 26, 2025 ]]> https://sciencedowneast.com/zenphoto/index.php?album=Nebulae/California-Nebula&image=California_Nebula_FILTER_LPR_EXPTIME_1200x10_integration_DBE-full.jpg Wed, 24 Mar 2021 21:41:11 -0300