Daily Sunspot Evaluation
Observation Sheet Wednesday, 12 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)
- 14
- Relative number (R)
- 54
- Observer
- HG
- Reading
- all checks consistent
- File
- 19870812.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 1 | 22 | 21E | 305 | 20E | -63 | 55 |
| 2 | ARX – 1 | -25 | 77W | 43 | 78W | 2 60 | 52 |
| 3 | DAI – 10 | -26 | 43E | 283 | 42E | 7 62 | 54 |
| 4 | ? – 2 | -30 | 77E | 249 | 76E | 6 64 | 56 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.