Daily Sunspot Evaluation
Observation Sheet Saturday, 17 July 1993
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)
- 5
- Number of spots (f)
- 18
- Relative number (R)
- 68
- Observer
- TÖ0
- Reading
- counts consistent, some coordinates doubtful
- File
- 19930717.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 1 | 9 | 79W | 259 | 82W | 2 | 180 |
| 2 | CAF – 9 | 7 | 14W | 134 ⚠ | 17W | 5.5 | 185 |
| 3 | HS – 1 | 8 | 61E | 119 | 58E | 2 | 186 |
| 4 | DAO – 6 | -9 | 43W | 223 | 46W | 3.5 | 182 |
| 5 | HS – 1 | -12 | 76E | 104 | 73E | 4 | 187 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.