Daily Sunspot Evaluation
Observation Sheet Tuesday, 12 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)
- 1
- Number of spots (f)
- 5
- Relative number (R)
- 15
- Observer
- FL
- Reading
- all checks consistent
- File
- 19870512.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 5 | -31 | 13W | 119 | 16W | 11.25 | 27 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.