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AR12871 and AR12872 survived, AR12873 decay
Whitelight — September 25, 2021 at 03:12 PM · by isontheline · Wolf 31 · A 0 ⚠Warning — Your eye must be behind a suitable filter! Never look at the Sun without proper visual protection! Can cause serious eye damage or blindness!
Whitelight solar observation made on September 25, 2021 by isontheline and published on Wolf.Solar. Wolf number 31 (2 groups, 11 spots). Naked-eye A number 0. Carrington rotation 2249. Tags: AR12871, AR12872, HARP6516, HARP6517.
Counts
| A number (naked eye) ⚠Warning — Your eye must be behind a suitable filter! Never look at the Sun without proper visual protection! Can cause serious eye damage or blindness! | 0 |
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| Groups | 2 |
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| Groups North | 1 |
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| Groups South | 1 |
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| Spots | 11 |
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| Spots North | 4 |
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| Spots South | 7 |
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| Plages | 1 |
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| CV number | 36 |
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| Q value | 7 |
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Conditions
| Seeing | 4 / 5 |
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| Cloud cover (octas) | 7 |
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Ephemerides
| Carrington rotation | 2249 |
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| L₀ | 346.22° |
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| B₀ | 6.94° |
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| P | 25.51° |
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| Declination | -1.10° |
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| Julian day | 2459483.13333 |
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AR12871AR12872HARP6516HARP6517
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