Daily Sunspot Evaluation
Observation Sheet Thursday, 27 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)
- 15
- Number of spots (f)
- 178
- Relative number (R)
- 328
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19810827.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAC – 13 | 1 | 61W | 309 | 64W | 8 | |
| 2 | EAC – 44 | 12 | 29W | 277 | 32W | 15 | |
| 3 | DAI – 16 | 20 | 03E | 245 | 00 | 8 | |
| 4 | ERI – 34 | 15 | 25E | 223 | 22E | 18 | |
| 5 | CKI – 9 | 15 | 45E | 203 | 42E | 9 | |
| 6 | HHX – 1 | -2 | 78W | 326 | 81W | 3 | |
| 7 | HHX – 1 | -15 | 76W | 324 | 79W | 4 | |
| 8 | AXX – 8 | -3 | 48W | 296 | 51W | 4 | |
| 9 | AXX – 4 | -11 | 47W | 295 | 50W | 1 | |
| 10 | DKC – 18 | -10 | 37W | 285 | 40W | 8 | |
| 11 | CAI – 10 | -9 | 22W | 270 | 25W | 5 | |
| 12 | AXX – 1 | -8 | 13W | 261 | 16W | - | |
| 13 | CRI – 8 | -5 | 02W | 250 | 05W | 4 | |
| 14 | BXO – 2 | -11 | 55E | 193 | 52E | 3.5 | |
| 15 | DKC – 9 | -17 | 74E | 174 | 71E | 11 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.