Daily Sunspot Evaluation
Observation Sheet Sunday, 9 February 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)
- 9
- Number of spots (f)
- 54
- Relative number (R)
- 144
- Observer
- AT
- Reading
- all checks consistent
- File
- 19690209.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 3 | 18 | 05E | 242 | |||
| 2 | A – 3 | -19 | 11W | 258 | |||
| 3 | A – 4 | -18 | 48W | 295 | |||
| 4 | J – 2 | -7 | 36W | 283 | |||
| 5 | E – 17 | 0 | 49W | 296 | |||
| 6 | A – 3 | 4 | 35W | 282 | |||
| 7 | J – 1 | 24 | 43W | 290 | |||
| 8 | C – 19 | 11 | 16W | 263 | |||
| 9 | A – 2 | 20 | 20W | 267 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.