Daily Sunspot Evaluation
Observation Sheet Saturday, 16 May 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)
- 12
- Relative number (R)
- 42
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19870516.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKC – 9 | 31 | 69E | 341 | 68E | 14.35 | 31 |
| 2 | HSX – 1 | -32 | 61W | 111 | 62W | 2.31 | 27 |
| 3 | CKO – 2 | -24 | 62E | 348 | 61E | 6.36 | 32 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.