Daily Sunspot Evaluation
Observation Sheet Thursday, 21 November 1957
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)
- 12
- Number of spots (f)
- 97
- Relative number (R)
- 217
- Observer
- WG
- Reading
- all checks consistent
- File
- 19571121.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 20 | 36E | ||||
| 2 | C – 6 | 10 | 33E | ||||
| 3 | A – 1 | -9 | 69E | ||||
| 4 | C – 12 | -15 | 34E | ||||
| 5 | J – 3 | -14 | 48E | ||||
| 6 | J – 1 | -13 | 58E | ||||
| 7 | C – 5 | -14 | 72E | ||||
| 8 | B – 6 | -8 | 45W | ||||
| 9 | C – 14 | 12 | 48W | ||||
| 10 | A – 3 | 25 | 29W | ||||
| 11 | E – 22 | 28 | 18W | ||||
| 12 | E – 22 | 16 | 4W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.