Daily Sunspot Evaluation
Observation Sheet Wednesday, 21 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)
- 11
- Number of spots (f)
- 118
- Relative number (R)
- 228
- Observer
- AT
- Reading
- counts consistent, some coordinates doubtful
- File
- 19690521.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 8 | 14 | 0 | 355 | |||
| 2 | H – 15 | 11 | 29E | 326 | |||
| 3 | H – 20 | 8 | 45E | 310 | |||
| 4 | D – 4 | 11 | 60E | 295 | |||
| 5 | J – 2 | 12 | 72E | 283 | |||
| 6 | ? – 1 | 11 | 85E | 272 | |||
| 7 | E – 15 | -17 | 39E | 316 | |||
| 8 | E – 45 | -13 | 47E | 338 ⚠ | |||
| 9 | A – 3 | -23 | 16E | 338 | |||
| 10 | A – 3 | -13 | 03W | 358 | |||
| 11 | ? – 2 | 13 | 74W | 69 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.