Daily Sunspot Evaluation
Observation Sheet Friday, 20 May 1988
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)
- 8
- Relative number (R)
- 38
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19880520.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 5 | -18 | 74W | 282 | 78W | 8.5 | 103 |
| 2 | AX – 2 | -18 | 69E | 140 | 65E | - | 104 |
| 3 | ? – 1 | -22 | 73E | 136 | 69E | - | 105 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.