Daily Sunspot Evaluation
Observation Sheet Wednesday, 28 September 1960
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)
- 9
- Number of spots (f)
- 53
- Relative number (R)
- 143
- Observer
- AB
- Reading
- all checks consistent
- File
- 19600928.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 3 | -6 | 0 | ||||
| 2 | D – 19 | -11 | 22W | ||||
| 3 | H – 2 | -19 | 54W | ||||
| 4 | D – 7 | 8 | 53W | ||||
| 5 | A – 1 | 13 | 57W | ||||
| 6 | J – 1 | 16 | 67W | ||||
| 7 | C – 4 | 17 | 52W | ||||
| 8 | B – 14 | 27 | 28W | ||||
| 9 | A – 2 | 23 | 3W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.