Daily Sunspot Evaluation
Observation Sheet Sunday, 17 February 2002
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)
- 29
- Relative number (R)
- 99
- Observer
- ıH
- Reading
- all checks consistent
- File
- 20020217.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ESO – 9 | 14 | 31W | 207 | 33W | 11.5 | |
| 2 | HS – 1 | 23 | 27W | 203 | 29W | 2 | |
| 3 | AX – 2 | 7 | 20W | 196 | 22W | 0.5 | |
| 4 | HR – 1 | -13 | 43W | 219 | 45W | ~0.5 | |
| 5 | CKO – 14 | -17 | 41E | 135 | 39E | 18 | |
| 6 | AX – 1 | -6 | 40E | 136 | 38E | ||
| 7 | AX – 1 | -4 | 46E | 130 | 44E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.