Daily Sunspot Evaluation
Observation Sheet Thursday, 13 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)
- 11
- Number of spots (f)
- 112
- Relative number (R)
- 222
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19790913.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 15 | 15 | 10°E | 302 | 07E | 195 | |
| 2 | D – 16 | 27 | 36E | 276 | 38E | 197 | |
| 3 | A – 1 | 32 | 74E | 238 | 71E | 204 | |
| 4 | D – 7 | 21 | 59E | 252 | 56E | 202 | |
| 5 | E – 36 | 8 | 08E | 304 | 05E | 196 | |
| 6 | A – 3 | -13 | 28E | 284 | 25E | 205 | |
| 7 | H – 1 | -25 | 44E | 268 | 41E | 200 | |
| 8 | G – 4 | -26 | 61W | 13 | 64W | 198 | |
| 9 | E – 19 | 13 | 36W | 348 | 39W | 190 | |
| 10 | B – 8 | 13 | 18W | 330 | 21W | 203 | |
| 11 | A – 2 | 28 | 08W | 320 | 41W | 192 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.