Daily Sunspot Evaluation
Observation Sheet Tuesday, 25 August 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)
- 16
- Number of spots (f)
- 181
- Relative number (R)
- 341
- Observer
- HM
- Reading
- all checks consistent
- File
- 19810825.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 7 | 11 | 33W | 308 | 36W | 6.5 | |
| 2 | CAI – 27 | 12 | 01W | 276 | 04W | 12 | |
| 3 | DAI – 18 | 20 | 29E | 246 | 26E | 6.5 | |
| 4 | FKC – 34 | 15 | 52E | 223 | 49E | 17.5 | |
| 5 | DKO – 7 | 15 | 74E | 201 | 71E | 12 | |
| 6 | H? – 1 | -14 | 84W | 359 | 87W | ||
| 7 | HSX – 1 | -2 | 52W | 327 | 55W | 2 | |
| 8 | DAO – 7 | -17 | 48W | 323 | 51W | 11 | |
| 9 | AXX – 3 | -6 | 22W | 297 | 25W | 2 | |
| 10 | ARI – 6 | -17 | 21W | 296 | 24W | 4 | |
| 11 | ARI – 6 | -10 | 19W | 294 | 22W | 3 | |
| 12 | ARI – 6 | -17 | 14W | 289 | 17W | 2 | |
| 13 | CKI – 33 | -12 | 07W | 282 | 10W | 12 | |
| 14 | HAI – 11 | -9 | 04E | 271 | 01E | 5 | |
| 15 | ARI – 6 | -9 | 14E | 261 | 11E | 2.5 | |
| 16 | BXI – 8 | -5 | 24E | 251 | 21E | 3 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.