Daily Sunspot Evaluation
Observation Sheet Saturday, 22 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)
- 4
- Number of spots (f)
- 8
- Relative number (R)
- 48
- Observer
- MA
- Reading
- all checks consistent
- File
- 19710522.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 17 | 07E | 60 | |||
| 2 | B – 4 | 14 | 31E | 36 | |||
| 3 | J – 1 | 13 | 38E | 29 | |||
| 4 | J – 2 | 5 | 67W | 134 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.