Daily Sunspot Evaluation
Observation Sheet Wednesday, 19 May 1971
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)
- 3
- Number of spots (f)
- 8
- Relative number (R)
- 38
- Observer
- DK
- Reading
- all checks consistent
- File
- 19710519.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 17 | 48E | 58 | |||
| 2 | A – 1 | 15 | 67E | 39 | |||
| 3 | H – 6 | 4 | 27W | 133 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.