Daily Sunspot Evaluation
Observation Sheet Monday, 12 February 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)
- 74
- Relative number (R)
- 184
- Observer
- GA
- Reading
- all checks consistent
- File
- 19790212.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 11 | 33E | 212 | 34E | 05 | |
| 2 | J – 4 | 20 | 77E | 168 | 75E | 106 | |
| 3 | J – 1 | 3 | 77E | 168 | 75E | 105 | |
| 4 | A – 2 | -10 | 26E | 219 | 24E | 101 | |
| 5 | D – 7 | -13 | 05E | 240 | 03E | 104 | |
| 6 | C – 9 | -18 | 08E | 237 | 06E | J1 | |
| 7 | G – 9 | -36 | 23E | 222 | 21E | 97 | |
| 8 | D – 9 | -20 | 30W | 275 | 32W | 92 | |
| 9 | A – 1 | -23 | 42W | 287 | 44W | 85 | |
| 10 | J – 1 | -17 | 48W | 293 | 50W | 100 | |
| 11 | F – 30 | 14 | 44W | 289 | 46W | 84 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.