Daily Sunspot Evaluation
Observation Sheet Saturday, 12 June 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)
- 22
- Relative number (R)
- 62
- Observer
- MA
- Reading
- all checks consistent
- File
- 19710612.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 16 | 15 | 05E | 144 | |||
| 2 | B – 2 | 7 | 06E | 143 | |||
| 3 | H – 3 | -7 | 52W | 201 | |||
| 4 | J – 1 | -1 | 74W | 223 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.