Daily Sunspot Evaluation
Observation Sheet Saturday, 21 May 1960
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)
- 7
- Number of spots (f)
- 57
- Relative number (R)
- 127
- Observer
- SG
- Reading
- all checks consistent
- File
- 19600521.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 19 | 3E | ||||
| 2 | C – 5 | 13 | 50E | ||||
| 3 | B – 2 | -2 | 7E | ||||
| 4 | F – 45 | -13 | 15W | ||||
| 5 | H – 1 | 5 | 44W | ||||
| 6 | A – 1 | 13 | 67W | ||||
| 7 | J – 1 | 17 | 5W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.