Sun prominence
Taken by Valerio on June 3, 2025 @
Londa Tuscany Italy
Click photo for larger image
| |
Camera Used: ZWO ASI224MC
Exposure Time: Unavailable
Aperture: Unavailable
ISO: Unavailable
Date Taken: 2025:06:17 18:22:48
|
|
| More images
Details:
Subject Line: "Dynamic Solar Prominence with Fine Filamentary Structures – H-alpha Observation"
Body:
Title: "Solar Prominence Ballet: A Magnetic Spectacle in H-alpha"
Date: June 3, 2025
Location: Londa, Florence, Italy (43°51'31"N 11°34'18"E, 347m a.s.l.)
Equipment & Acquisition:
Telescope: Lunt LS60T H-alpha B600
Camera: ASI 224 MC + 2x Barlow
Mount: Avalon Linear Fast Reverse
Acquisition: 120-second capture (5.0 ms shutter, 58 fps, gain 246, gamma 49)
Conditions: Sensor temperature 34°C, stable seeing
Software: FireCapture, AutoStakkert, AstroSurface (wavelet sharpening), Photoshop
Description:
"This high-resolution H-alpha image captures a striking solar prominence extending ~92,000 km (∼7 Earth diameters) from the limb. The structure exhibits well-defined filamentary details and potential Kelvin-Helmholtz instabilities along its edges (visible at <1,000 km resolution). The plasma’s dynamic density stratification suggests active magnetic restructuring—possibly precursor to a CME or gradual dissipation.
Notable Features:
Distinct alternating high/low-density plasma layers
Fibril structures tracing magnetic field lines (enhanced via wavelet processing)
Optimal contrast between 10,000°C plasma and dark background
Processing Approach:
Science-optimized: Preserved intensity gradients for density analysis
Selective enhancement: AstroSurface wavelet sharpening for clarity
Credit: Valerio Fontani
Affiliation: Società Astronomica Galileo Galilei, Londa (FI), Italy
Photographer's website:
https://http://www.elcrab.altervista.org/
|
|
|
