Daily Sunspot Evaluation
Observation Sheet Wednesday, 25 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)
- 9
- Number of spots (f)
- 117
- Relative number (R)
- 207
- Observer
- SB0
- Reading
- all checks consistent
- File
- 20010425.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 4 | 9 | 70W | 221 | 73W | ~11.5 | |
| 2 | KC – 87 | 16 | 02W | 153 | 05W | ~24.5 | |
| 3 | AX – 2 | 21 | 15E | 136 | 12E | ||
| 4 | CSO – 8 | 8 | 29E | 122 | 26E | ~4.5 | |
| 5 | HS – 2 | -11 | 48W | 199 | 51W | 1 | |
| 6 | OSO – 7 | -20 | 42W | 193 | 45W | 9 | |
| 7 | HA – 5 | -22 | 18W | 169 | 21W | ~2 | |
| 8 | HS – 1 | -10 | 29E | 122 | 26E | 2.5 | |
| 9 | AX – 1 | -8 | 55E | 96 | 52E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.