Daily Sunspot Evaluation
Observation Sheet Tuesday, 11 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)
- 107
- Relative number (R)
- 217
- Observer
- HM
- Reading
- counts consistent, some coordinates doubtful
- File
- 19790911.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 25 | 09E | 380 ⚠ | 06E | 192 | |
| 2 | C – 7 | 27 | 63E | 276 | 60E | 197 | |
| 3 | D – 16 | 15 | 35E | 304 | 32E | 195 | |
| 4 | D – 20 | 9 | 35E | 304 | 32E | 196 | |
| 5 | ? – 1 | 200 | |||||
| 6 | D – 10 | -26 | 38W | 12 ⚠ | 36W | 198 | |
| 7 | A – 1 | -32 | 38W | 18 | 42W | 201 | |
| 8 | J – 1 | -18 | 62W | 41 | 65W | 188 | |
| 9 | E – 10 | 15 | 70W | 49 | 73W | 187 | |
| 10 | E – 39 | 14 | 07W | 346 | 10W | 190 | |
| 11 | ? – 1 | 178 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.