Daily Sunspot Evaluation
Observation Sheet Sunday, 22 April 2001
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 7
- Number of spots (f)
- 100
- Relative number (R)
- 170
- Observer
- —
- Reading
- counts consistent, some coordinates doubtful
- File
- 20010422.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 2 | 9 | 38W | 226 | 38W | 1.5 | |
| 2 | DAC – 20 | 8 | 26W | 204 ⚠ | 26W | 2.8 | |
| 3 | FKC – 49 | 16 | 34E | 154 | 34E | 22 | |
| 4 | HA – 1 | 10 | 68E | 120 | 68E | 2.2 | |
| 5 | CAE – 13 | -11 | 06W | 194 | 06W | 5.5 | |
| 6 | DAE – 12 | -20 | 04W | 192 | 04W | 9 | |
| 7 | HA – 3 | -11 | 66E | 122 | 66E | 3 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.