Daily Sunspot Evaluation
Observation Sheet Tuesday, 17 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)
- 9
- Number of spots (f)
- 97
- Relative number (R)
- 187
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19790417.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 1 | 7 | 74E | 48 | 72E | 226 | |
| 2 | C – 27 | -24 | 06W | 128 | 08W | 227 | |
| 3 | A – 1 | -27 | 65W | 187 | 67W | 228 | |
| 4 | H – 6 | 3 | 23W | 145 | 25W | 215 | |
| 5 | G – 8 | 34 | 53W | 175 | 55W | 225 | |
| 6 | J – 5 | 8 | 09W | 131 | 11W | 217 | |
| 7 | B – 10 | 18 | 10W | 132 | 12W | 223 | |
| 8 | A – 4 | 11 | 02W | 124 | 04W | 227 | |
| 9 | E – 35 | 31 | 03W | 125 | 05W | 221 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.