Daily Sunspot Evaluation
Observation Sheet Sunday, 17 May 1970
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)
- 12
- Number of spots (f)
- 139
- Relative number (R)
- 259
- Observer
- MÖ
- Reading
- all checks consistent
- File
- 19700517.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 51 | 17 | 15°E | 256 | |||
| 2 | H – 2 | 15 | 71°E | 200 | |||
| 3 | A – 8 | -10 | 30°E | 241 | |||
| 4 | B – 2 | -15 | 13°E | 258 | |||
| 5 | B – 3 | -19 | 14°E | 257 | |||
| 6 | A – 1 | -13 | 0° | 271 | |||
| 7 | J – 2 | -12 | 04°W | 275 | |||
| 8 | J – 1 | -8 | 08°W | 280 | |||
| 9 | B – 6 | -15 | 30°W | 301 | |||
| 10 | F – 54 | -8 | 35°W | 306 | |||
| 11 | A – 2 | 1 | 18°W | 293 | |||
| 12 | G – 7 | 19 | 26°W | 297 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.