Daily Sunspot Evaluation
Observation Sheet Saturday, 16 May 1981
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)
- 6
- Number of spots (f)
- 129
- Relative number (R)
- 189
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19810516.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BAI – 7 | 10 | 60W | 230 | 62W | 5 | |
| 2 | DKO – 11 | 12 | 41W | 211 | 43W | 11 | |
| 3 | FKC – 88 | 14 | 20E | 150 | 18E | 28.5 | |
| 4 | HAX – 1 | -6 | 30W | 200 | 32W | 15 | |
| 5 | DRI – 13 | -26 | 08E | 162 | 06E | 7.5 | |
| 6 | HKI – 9 | -25 | 52E | 118 | 50E | 6 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.