Daily Sunspot Evaluation
Observation Sheet Tuesday, 21 October 1958
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)
- 15
- Number of spots (f)
- 130
- Relative number (R)
- 280
- Observer
- AK
- Reading
- all checks consistent
- File
- 19581021.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 12 | 22E | ||||
| 2 | C – 6 | 18 | 54E | ||||
| 3 | A – 1 | 2 | 70E | ||||
| 4 | A – 1 | -8 | 21E | ||||
| 5 | J – 1 | -8 | 38E | ||||
| 6 | J – 1 | -20 | 61E | ||||
| 7 | F – 44 | -11 | 13E | ||||
| 8 | A – 1 | -29 | 38W | ||||
| 9 | E – 37 | -4 | 13W | ||||
| 10 | H – 1 | -31 | 55W | ||||
| 11 | J – 1 | -19 | 54W | ||||
| 12 | A – 2 | -10 | 35W | ||||
| 13 | A – 4 | -17 | 65W | ||||
| 14 | E – 28 | 20 | 39W | ||||
| 15 | J – 1 | 25 | 50W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.