Daily Sunspot Evaluation
Observation Sheet Saturday, 15 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)
- 3
- Number of spots (f)
- 18
- Relative number (R)
- 48
- Observer
- FL
- Reading
- all checks consistent
- File
- 19870815.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 4 | -23 | 49E | 240 | 46E | 6.45 | 57 |
| 2 | CKI – 3 | -26 | 06E | 283 | 03E | 3.62 | 54 |
| 3 | DKI – 11 | -31 | 41E | 248 | 38E | 5.54 | 56 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.