Daily Sunspot Evaluation
Observation Sheet Saturday, 21 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)
- 10
- Number of spots (f)
- 67
- Relative number (R)
- 167
- Observer
- ED
- Reading
- all checks consistent
- File
- 19790721.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 3 | 32 | 12E | 294 | 09E | 101 | |
| 2 | G – 2 | 12 | 33E | 273 | 30E | 100 | |
| 3 | B – 7 | -5 | 27E | 279 | 24E | 107 | |
| 4 | G – 5 | -4 | 01E | 305 | 02W | 96 | |
| 5 | D – 14 | -20 | 12W | 318 | 15W | 99 | |
| 6 | H – 3 | -29 | 49W | 355 | 52W | 93 | |
| 7 | B – 2 | -23 | 44W | 350 | 47W | 103 | |
| 8 | E – 17 | 14 | 46W | 352 | 49W | 104 | |
| 9 | B – 11 | 28 | 60W | 6 | 63W | 105 | |
| 10 | H – 3 | 29 | 28W | 336 | 31W | 92 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.