Daily Sunspot Evaluation
Observation Sheet Friday, 17 August 1979
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)
- 7
- Number of spots (f)
- 52
- Relative number (R)
- 122
- Observer
- ED
- Reading
- all checks consistent
- File
- 19790817.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 17 | 06E | 300 | 06E | 145 | |
| 2 | J – 1 | 17 | 52E | 254 | 52E | 150 | |
| 3 | A – 1 | -13 | 43E | 263 | 43E | 151 | |
| 4 | E – 31 | -26 | 33E | 273 | 33E | 148 | |
| 5 | C – 5 | -24 | 16E | 290 | 16E | 146 | |
| 6 | H – 8 | 15 | 47W | 353 | 47W | 136 | |
| 7 | B – 5 | 14 | 34W | 340 | 34W | 152 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.