Daily Sunspot Evaluation
Observation Sheet Friday, 14 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)
- 7
- Number of spots (f)
- 45
- Relative number (R)
- 115
- Observer
- HA
- Reading
- all checks consistent
- File
- 19710514.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 8 | 06E | 166 | |||
| 2 | C – 9 | 2 | 15E | 157 | |||
| 3 | H – 15 | 6 | 42E | 130 | |||
| 4 | A – 5 | 5 | 46W | 218 | |||
| 5 | ? – 1 | 11 | 80W | 252 | |||
| 6 | B – 6 | 4 | 17W | 189 | |||
| 7 | C – 7 | 18 | 22W | 194 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.