Daily Sunspot Evaluation
Observation Sheet Thursday, 14 February 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)
- 26
- Relative number (R)
- 136
- Observer
- MH
- Reading
- all checks consistent
- File
- 19570214.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 15 | 50E | ||||
| 2 | A – 1 | 13 | 61E | ||||
| 3 | J – 1 | 9 | 49E | ||||
| 4 | A – 1 | 8 | 61E | ||||
| 5 | C – 5 | -22 | 67E | ||||
| 6 | ? – 1 | -26 | 85E | ||||
| 7 | J – 2 | -25 | 6E | ||||
| 8 | D – 5 | -22 | 19W | ||||
| 9 | J – 1 | -21 | 26W | ||||
| 10 | C – 6 | -26 | 34W | ||||
| 11 | H – 1 | -26 | 53W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.