Daily Sunspot Evaluation
Observation Sheet Sunday, 10 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)
- 12
- Number of spots (f)
- 68
- Relative number (R)
- 188
- Observer
- GT
- Reading
- all checks consistent
- File
- 19810510.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 2 | 6 | 78W | 328 | 81W | 3 | |
| 2 | CKO – 4 | 17 | 66W | 316 | 69W | 10 | |
| 3 | AXX – 1 | 16 | 43W | 293 | 46W | 1 | |
| 4 | AXX – 1 | 11 | 41W | 291 | 44W | ||
| 5 | AXX – 3 | 7 | 00 | 250 | 03W | 3 | |
| 6 | HSX – 1 | 13 | 12E | 238 | 09E | 1.5 | |
| 7 | EKC – 35 | 9 | 19E | 231 | 16E | 12 | |
| 8 | DSO – 10 | 11 | 41E | 209 | 38E | 6 | |
| 9 | AXX – 4 | -18 | 24W | 274 | 27W | 3 | |
| 10 | ARX – 4 | -22 | 17W | 267 | 20W | 2 | |
| 11 | AXX – 2 | -6 | 16E | 234 | 13E | 1 | |
| 12 | HAX – 1 | -7 | 51E | 199 | 48E | 2 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.