Daily Sunspot Evaluation
Observation Sheet Tuesday, 19 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)
- 20
- Relative number (R)
- 50
- Observer
- FL
- Reading
- all checks consistent
- File
- 19870519.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKI – 12 | 30 | 31E | 342 | 28E | 41.5 | 31 |
| 2 | AXX – 2 | -20 | 68W | 79 | 71W | 3.3 | 29 |
| 3 | BXI – 6 | -24 | 25E | 348 | 22E | 2.36 | 32 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.