Daily Sunspot Evaluation
Observation Sheet Wednesday, 17 April 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)
- 6
- Number of spots (f)
- 56
- Relative number (R)
- 116
- Observer
- TÇ
- Reading
- all checks consistent
- File
- 20020417.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 1 | 19 | 65W | 181 | 65W | 2 | |
| 2 | HA – 1 | 11 | 50W | 166 | 50W | ~1.5 | |
| 3 | HS – 2 | 7 | 34E | 82 | 34E | ~2.5 | |
| 4 | EKC – 21 | -14 | 34W | 150 | 34W | 11.5 | |
| 5 | DAI – 16 | -4 | 01W | 117 | 01W | 9.5 | |
| 6 | DAO – 15 | -20 | 28E | 88 | 28E | 8 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.