Daily Sunspot Evaluation
Observation Sheet Saturday, 17 June 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)
- 7
- Number of spots (f)
- 93
- Relative number (R)
- 163
- Observer
- SK
- Reading
- all checks consistent
- File
- 19610617.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 23 | 72E | ||||
| 2 | J – 3 | -6 | 50E | ||||
| 3 | F – 40 | -9 | 13F | ||||
| 4 | J – 1 | -18 | 0 | ||||
| 5 | D – 14 | -11 | 22W | ||||
| 6 | B – 2 | -3 | 63W | ||||
| 7 | C – 31 | 3 | 25W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.