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Relevé H-Alpha du 2025-10-17 09:30 UTC
H-Alpha — October 17, 2025 at 09:30 AM · by astrololo31 · Wolf 90
H-Alpha solar observation made on October 17, 2025 by astrololo31 and published on Wolf.Solar. Wolf number 90 (7 groups, 20 spots). Carrington rotation 2303.
Counts
| Groups | 7 |
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| Spots | 20 |
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| Hα active | 5 |
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| Hα quiescent | 8 |
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| Filaments | 16 |
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| Flares | 0 |
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| Plages | 5 |
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Conditions
| Seeing | 2 / 5 |
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| Transparency | 2 / 4 |
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| Cloud cover (octas) | 0 |
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Ephemerides
| Carrington rotation | 2303 |
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| L₀ | 215.66° |
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| B₀ | 5.70° |
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| P | 26.06° |
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| Declination | -9.41° |
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| Julian day | 2460965.89583 |
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View on Wolf.Solar ↗
Grand filament au Nord-Est