Daily Sunspot Evaluation
Observation Sheet Thursday, 21 May 1959
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)
- 11
- Number of spots (f)
- 85
- Relative number (R)
- 195
- Observer
- FY
- Reading
- all checks consistent
- File
- 19590521.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 19 | 4E | ||||
| 2 | C – 19 | 22 | 25E | ||||
| 3 | J – 2 | 12 | 57E | ||||
| 4 | A – 2 | 15 | 67E | ||||
| 5 | J – 3 | 1 | 69E | ||||
| 6 | ? – 7 | -15 | 73E | ||||
| 7 | B – 8 | -6 | 16W | ||||
| 8 | B – 7 | 10 | 46W | ||||
| 9 | ? – 4 | 21 | 70W | ||||
| 10 | B – 2 | 23 | 8W | ||||
| 11 | E – 30 | 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.