Daily Sunspot Evaluation
Observation Sheet Tuesday, 17 August 1999
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)
- 9
- Relative number (R)
- 39
- Observer
- NA
- Reading
- all checks consistent
- File
- 19990817.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | -16 | 80W | 90 | 82W | ? | |
| 2 | CAO – 3 | -10 | 34W | 44 | 36W | -4 | |
| 3 | HK – 5 | 20 | 35E | 335 | 33E | 4.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.