Daily Sunspot Evaluation
Observation Sheet Thursday, 23 May 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)
- 11
- Number of spots (f)
- 62
- Relative number (R)
- 172
- Observer
- WG
- Reading
- all checks consistent
- File
- 19570523.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 13 | 15 | 21E | ||||
| 2 | H – 1 | 21 | 56E | ||||
| 3 | C – 3 | -12 | 40E | ||||
| 4 | E – 1 | -23 | 85E | ||||
| 5 | C – 6 | -12 | 40E | ||||
| 6 | D – 9 | -17 | 12W | ||||
| 7 | C – 10 | -18 | 53W | ||||
| 8 | J – 1 | -14 | 62W | ||||
| 9 | B – 5 | -12 | 39W | ||||
| 10 | E – 1 | -12 | 77W | ||||
| 11 | D – 12 | 8 | 32W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.