Daily Sunspot Evaluation
Observation Sheet Thursday, 26 August 1971
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)
- 71
- Relative number (R)
- 111
- Observer
- HM
- Reading
- all checks consistent
- File
- 19710826.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 2 | -5 | 03E | 233 | |||
| 2 | F – 59 | -12 | 33W | 269 | |||
| 3 | B – 9 | 12 | 52W | 288 | |||
| 4 | J – 1 | 13 | 81W | 317 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.