Daily Sunspot Evaluation
Observation Sheet Sunday, 19 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)
- 16
- Number of spots (f)
- 93
- Relative number (R)
- 253
- Observer
- ET
- Reading
- all checks consistent
- File
- 19570519.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 3 | 13 | 32E | ||||
| 2 | E – 20 | 18 | 22E | ||||
| 3 | G – 7 | -11 | 67E | ||||
| 4 | A – 2 | -10 | 18E | ||||
| 5 | A – 5 | -33 | 50E | ||||
| 6 | A – 3 | -27 | 19E | ||||
| 7 | B – 10 | -22 | 12E | ||||
| 8 | B – 7 | -16 | 0 | ||||
| 9 | J – 2 | -14 | 8W | ||||
| 10 | H – 4 | -12 | 22W | ||||
| 11 | A – 5 | -10 | 28W | ||||
| 12 | A – 2 | -8 | 35W | ||||
| 13 | A – 8 | -11 | 45W | ||||
| 14 | A – 2 | 18 | 35W | ||||
| 15 | J – 1 | 20 | 46W | ||||
| 16 | C – 12 | 28 | 41W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.