Daily Sunspot Evaluation
Observation Sheet Sunday, 13 August 1961
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)
- 6
- Number of spots (f)
- 23
- Relative number (R)
- 83
- Observer
- MH
- Reading
- all checks consistent
- File
- 19610813.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 7 | 15 | 10E | ||||
| 2 | J – 2 | 8 | 35E | ||||
| 3 | ? – 3 | 1 | 70E | ||||
| 4 | D – 3 | -2 | 37E | ||||
| 5 | ? – 1 | -9 | 77W | ||||
| 6 | B – 7 | 18 | 60W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.