Daily Sunspot Evaluation
Observation Sheet Friday, 21 September 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)
- 9
- Number of spots (f)
- 88
- Relative number (R)
- 178
- Observer
- SM
- Reading
- all checks consistent
- File
- 19790921.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 15 | 27 | 42E | 164 | 39E | 214 | |
| 2 | ? – 2 | 17 | 78E | 128 | 75E | 222 | |
| 3 | B – 2 | 13 | 10E | 196 | 07E | 223 | |
| 4 | F – 40 | 6 | 15E | 191 | 12E | 211 | |
| 5 | D – 18 | -20 | 41E | 165 | 38E | 216 | |
| 6 | A – 1 | -13 | 33E | 173 | 30E | 215 | |
| 7 | B – 3 | -11 | 07E | 199 | 04E | 219 | |
| 8 | J – 3 | -21 | 11E | 195 | 08E | 212 | |
| 9 | H – 4 | -28 | 61W | 267 | 64W | 200 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.