Daily Sunspot Evaluation
Observation Sheet Tuesday, 13 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)
- 37
- Relative number (R)
- 147
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19790213.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 3 | 23 | 23E | 209 | 20E | 107 | |
| 2 | J – 1 | 10 | 20E | 212 | 17E | 95 | |
| 3 | G – 2 | 20 | 64E | 168 | 61E | 106 | |
| 4 | J – 1 | 3 | 67E | 165 | 64E | 105 | |
| 5 | A – 1 | -1 | 16E | 216 | 13E | 101 | |
| 6 | G – 5 | -37 | 10E | 222 | 07E | 97 | |
| 7 | G – 4 | -17 | 05W | 237 | 08W | 91 | |
| 8 | D – 5 | -14 | 09W | 241 | 12W | 104 | |
| 9 | J – 1 | -19 | 46W | 278 | 49W | 92 | |
| 10 | A – 1 | -18 | 62W | 294 | 65W | 100 | |
| 11 | F – 13 | 14 | 58W | 290 | 61W | 84 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.