Daily Sunspot Evaluation
Observation Sheet Thursday, 12 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)
- 8
- Number of spots (f)
- 41
- Relative number (R)
- 121
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19790412.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 4 | 19 | 03E | 185 | 01E | 212 | |
| 2 | G – 3 | 30 | 63E | 125 | 61E | 221 | |
| 3 | A – 2 | 19 | 58E | 130 | 56E | 223 | |
| 4 | A – 1 | 16 | 70E | 118 | 68E | 220 | |
| 5 | J – 1 | 9 | 59E | 129 | 57E | 217 | |
| 6 | H – 20 | 4 | 46E | 142 | 44E | 215 | |
| 7 | B – 2 | -22 | 62E | 126 | 60E | 222 | |
| 8 | H – 8 | -27 | 52W | 240 | 54W | 214 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.