Daily Sunspot Evaluation
Observation Sheet Tuesday, 17 July 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)
- 8
- Number of spots (f)
- 55
- Relative number (R)
- 135
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19790717.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 11 | 30 | 25E | 334 | 22E | 72 | |
| 2 | ? – 1 | 12 | 85E | 274 | 82E | 100 | |
| 3 | G – 8 | -3 | 56E | 303 | 53E | 96 | |
| 4 | A – 1 | -19 | 41E | 318 | 38E | 99 | |
| 5 | C – 14 | -28 | 07E | 352 | 04E | 93 | |
| 6 | C – 4 | -20 | 29W | 28 | 32W | 101 | |
| 7 | C – 5 | -27 | 52W | 51 | 55W | 78 | |
| 8 | C – 11 | 10 | 48W | 47 | 51W | 71 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.