Daily Sunspot Evaluation
Observation Sheet Monday, 11 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)
- 13
- Number of spots (f)
- 112
- Relative number (R)
- 242
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19810511.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 1 | 17 | 76W | 313 | 79W | 3 | |
| 2 | HAX – 1 | 17 | 55W | 292 | 58W | 1.5 | |
| 3 | CAO – 5 | 11 | 54W | 291 | 57W | 4 | |
| 4 | BXI – 4 | 21 | 35W | 272 | 38W | 2.25 | |
| 5 | CSO – 2 | 14 | 01E | 236 | 02W | 3.5 | |
| 6 | FKC – 65 | 10 | 06E | 231 | 03E | 11E | |
| 7 | RXX – 2 | 14 | 18E | 219 | 15E | 1 | |
| 8 | DAO – 15 | 12 | 28E | 209 | 25E | 7 | |
| 9 | ? – 4 | 12 | 83E | 154 | 80E | -E | |
| 10 | ARX – 3 | -22 | 29W | 266 | 32W | 1 | |
| 11 | RXX – 4 | -23 | 16W | 253 | 19W | 1.5 | |
| 12 | BXO – 4 | -5 | 03E | 234 | 00 | 2 | |
| 13 | CAO – 2 | -6 | 40E | 197 | 37E | 5.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.