Daily Sunspot Evaluation
Observation Sheet Friday, 20 April 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)
- 31
- Relative number (R)
- 101
- Observer
- GA
- Reading
- all checks consistent
- File
- 19790420.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 6 | 36E | 47 | 33E | 226 | |
| 2 | C – 11 | -25 | 46W | 129 | 49W | 227 | |
| 3 | A – 1 | -14 | 47W | 130 | 50W | 229 | |
| 4 | H – 1 | 3 | 63W | 146 | 66W | 215 | |
| 5 | A – 1 | 6 | 49W | 132 | 52W | 217 | |
| 6 | C – 6 | 15 | 55W | 138 | 58W | 230 | |
| 7 | C – 10 | 27 | 44W | 127 | 47W | 221 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.