Daily Sunspot Evaluation
Observation Sheet Sunday, 16 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)
- 8
- Number of spots (f)
- 33
- Relative number (R)
- 113
- Observer
- SK
- Reading
- all checks consistent
- File
- 19710516.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 6 | 12 | 02E | 143 | |||
| 2 | H – 18 | 4 | 15E | 130 | |||
| 3 | A – 2 | -5 | 59E | 86 | |||
| 4 | A – 1 | -8 | 35E | 110 | |||
| 5 | A – 1 | -16 | 28E | 117 | |||
| 6 | B – 3 | -6 | 44W | 189 | |||
| 7 | ? – 1 | 5 | 79W | 222 | |||
| 8 | J – 1 | 19 | 51W | 196 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.