Daily Sunspot Evaluation
Observation Sheet Tuesday, 20 May 1969
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
- FY
- Reading
- all checks consistent
- File
- 19690520.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 3 | 11 | 41E | 329 | |||
| 2 | ? – 3 | 12 | 73E | 295 | |||
| 3 | H – 9 | 8 | 58E | 310 | |||
| 4 | E – 14 | -17 | 52E | 316 | |||
| 5 | E – 21 | -13 | 30E | 338 | |||
| 6 | ? – 4 | 16 | 72W | 80 | |||
| 7 | J – 3 | 18 | 62W | 70 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.