Daily Sunspot Evaluation
Observation Sheet Monday, 17 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)
- 7
- Number of spots (f)
- 39
- Relative number (R)
- 109
- Observer
- FY
- Reading
- all checks consistent
- File
- 19790917.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 2 | 19 | 04E | 255 | 01E | 202 | |
| 2 | ? – 12 | 6 | 70E | 189 | 67E | 211 | |
| 3 | J – 1 | -20 | 64E | 195 | 61E | 212 | |
| 4 | A – 1 | -10 | 31E | 228 | 28E | 206 | |
| 5 | H – 6 | -26 | 08W | 267 | 11W | 200 | |
| 6 | C – 3 | -10 | 26W | 285 | 29W | 213 | |
| 7 | E – 14 | 8 | 48W | 307 | 51W | 196 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.