Daily Sunspot Evaluation
Observation Sheet Wednesday, 17 August 1966
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)
- 4
- Number of spots (f)
- 21
- Relative number (R)
- 61
- Observer
- SB
- Reading
- all checks consistent
- File
- 19660817.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 6 | 30 | 19E | 317 | |||
| 2 | B – 8 | 22 | 15W | 351 | |||
| 3 | J – 3 | 33 | 37W | 373 | |||
| 4 | J – 4 | 37 | 23W | 359 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.