Daily Sunspot Evaluation
Observation Sheet Friday, 28 August 1970
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)
- 10
- Number of spots (f)
- 58
- Relative number (R)
- 158
- Observer
- FA
- Reading
- all checks consistent
- File
- 19700828.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 3 | 9 | 03E | 345 | |||
| 2 | D – 11 | 12 | 23E | 325 | |||
| 3 | ? – 5 | 19 | 78E | 270 | |||
| 4 | J – 1 | 13 | 30E | 318 | |||
| 5 | A – 3 | -12 | 18E | 330 | |||
| 6 | G – 3 | -7 | 08E | 340 | |||
| 7 | D – 10 | -11 | 09E | 339 | |||
| 8 | J – 1 | 5 | 42W | 30 | |||
| 9 | G – 13 | 12 | 10W | 358 | |||
| 10 | G – 8 | 18 | 55W | 43 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.