Daily Sunspot Evaluation
Observation Sheet Thursday, 17 July 1986
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)
- 3
- Number of spots (f)
- 7
- Relative number (R)
- 37
- Observer
- FL
- Reading
- all checks consistent
- File
- 19860717.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 3 | 7 | 56E | 34 | 53E | 8 | |
| 2 | HAX – 1 | -1 | 75W | 165 | 78W | 1 | |
| 3 | ARX – 3 | -7 | 39E | 51 | 36E | 2 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.