Celestial Blossom: A Tri-band Glimpse of the Rosette Nebula from Al Sadeem Observatory, UAEThis striking pic i took of the Rosette Nebula is more than just a deep sky wonder. While imaging this celestial marvel in narrowband, a rare and spectacular event was serendipitously recorded: a meteor from the Geminids meteor shower streaking across the cosmic canvas. This chance occurrence, captured two days ago, adds a dynamic and ephemeral element to the usually static deep sky scenes.However, the highlight of this image is undoubtedly the Geminid meteor, a transient visitor that perfectly photobombed this long exposure. The meteor's bright streak adds a unique and unplanned contrast to the detailed nebula, emphasizing the dynamic and ever-changing nature of our universe. This fleeting moment, where a moving meteor intersects with the distant, light-years-spanning nebula, serves as a reminder of the cosmic dance between the transient and the eternal.

Photometric Analysis:

The histogram of the grayscale pixel values provides a visualization of the noise distribution in the image. Here are the calculated statistical measures for the entire grayscale image:

• Mean Pixel Intensity: 76.86
• Median Pixel Intensity: 75.00
• Standard Deviation: 34.18
• Signal-to-Noise Ratio (SNR): 2.25

The dashed red line in the histogram represents the mean pixel intensity, the green line is the median, and the blue lines show one standard deviation away from the mean on either side.

Here are the morphological operations applied to the combined equalized red, green, and blue channels (HA,OIII,SII):



All Channels Erosion: This operation has thinned the brighter areas in the combined image and may have made finer structures more evident across all colors.
All Channels Dilation: The dilation has expanded the bright regions across all channels, potentially connecting nearby features.
All Channels Opening: This process, which involves erosion followed by dilation, may have removed small objects or noise across all channels.
All Channels Closing: This is the reverse of opening and has likely closed small gaps in bright features across the combined channels.These processed images now show the nebula with enhanced features in a full-color representation. The morphological operations can help in visualizing different structural components and may aid in astronomical analysis by highlighting specific features in the nebula's formation.

To perform a simulated continuum subtraction on the red and blue channels of the image, we would typically smooth these channels to create a representation of the continuum and then subtract this from the original channels. The smoothing can be done using a Gaussian blur, which simulates the low-pass filter effect of the continuum.Performing these steps on the red and blue channels. We applied a Gaussian blur to create the continuum and then subtract it from the original channels. This will enhance features in the channels that are not part of the smooth continuum.




Here is a combo of all layers and final image



Lastly a treat for ya'll the meteor sub



Data acquired by Mohamed Usama Ismail aka
URSAMO https://www.instagram.com/ursamo_astrophotography/
Head Operator at
Al Sadeem Observatory UAE https://alsadeemastronomy.ae/  <Check out our amazing team here

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