Daily Sunspot Evaluation
Observation Sheet Friday, 16 August 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)
- 14
- Number of spots (f)
- 60
- Relative number (R)
- 200
- Observer
- FY
- Reading
- all checks consistent
- File
- 19570816.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 1 | 22 | 17E | ||||
| 2 | J – 2 | 33 | 63E | ||||
| 3 | ? – 6 | 16 | 74E | ||||
| 4 | ? – 3 | 10 | 73E | ||||
| 5 | B – 5 | -24 | 42E | ||||
| 6 | A – 1 | -18 | 27E | ||||
| 7 | A – 2 | -21 | 24E | ||||
| 8 | H – 7 | -33 | 32E | ||||
| 9 | A – 1 | -17 | 15W | ||||
| 10 | A – 2 | -30 | 32W | ||||
| 11 | A – 1 | -18 | 20W | ||||
| 12 | D – 7 | -14 | 58W | ||||
| 13 | C – 10 | 14 | 32W | ||||
| 14 | B – 12 | 17 | 43W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.