Daily Sunspot Evaluation
Observation Sheet Monday, 21 September 1959
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)
- 10
- Number of spots (f)
- 76
- Relative number (R)
- 176
- Observer
- BG
- Reading
- all checks consistent
- File
- 19590921.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 8 | 27 | 43E | ||||
| 2 | A – 7 | 2 | 13E | ||||
| 3 | H – 10 | -9 | 43E | ||||
| 4 | D – 6 | -10 | 53E | ||||
| 5 | B – 2 | -20 | 2E | ||||
| 6 | D – 14 | -12 | 16W | ||||
| 7 | B – 8 | -15 | 37W | ||||
| 8 | A – 1 | -17 | 45W | ||||
| 9 | J – 2 | 5 | 64W | ||||
| 10 | C – 18 | 15 | 22W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.