Daily Sunspot Evaluation
Observation Sheet Tuesday, 11 August 1987
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)
- 4
- Number of spots (f)
- 16
- Relative number (R)
- 56
- Observer
- HG
- Reading
- all checks consistent
- File
- 19870811.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 1 | 6 | 74W | 55 | 77W | 1 | 53 |
| 2 | AXX – 5 | 22 | 38E | 303 | 35E | 2.5 | 55 |
| 3 | DKI – 4 | -23 | 63W | 44 | 66W | 11 | 52 |
| 4 | DAI – 6 | -26 | 58E | 283 | 55E | 6 | 54 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.