Daily Sunspot Evaluation
Observation Sheet Monday, 9 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)
- 10
- Number of spots (f)
- 74
- Relative number (R)
- 174
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 20010409.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 21 | 78W | 81 | 81W | 3 | |
| 2 | AX – 3 | 19 | 01E | 1 | 02W | 2 | |
| 3 | AX – 1 | 11 | 12E | 351 | 09E | ||
| 4 | CAI – 22 | 27 | 17E | 346 | 14E | 14 | |
| 5 | HR – 1 | -17 | 61W | 64 | 64W | 0.5 | |
| 6 | CAI – 11 | -10 | 16W | 19 | 19W | 9 | |
| 7 | EKC – 31 | -22 | 05E | 358 | 02E | ~13 | |
| 8 | HA – 1 | -7 | 33E | 330 | 30E | ~15 | |
| 9 | AX – 1 | -17 | 34E | 329 | 31E | ||
| 10 | HA – 2 | -12 | 62E | 301 | 59E | ~2 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.