Daily Sunspot Evaluation
Observation Sheet Monday, 9 September 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)
- 6
- Number of spots (f)
- 64
- Relative number (R)
- 124
- Observer
- MH
- Reading
- all checks consistent
- File
- 19570909.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 29 | 11 | 19E | ||||
| 2 | A – 2 | -20 | 63E | ||||
| 3 | A – 6 | -16 | 29E | ||||
| 4 | C – 16 | -13 | 17E | ||||
| 5 | J – 1 | -43 | 57E | ||||
| 6 | E – 10 | -24 | 33W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.