Daily Sunspot Evaluation
Observation Sheet Monday, 27 July 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)
- 198
- Relative number (R)
- 328
- Observer
- AÖ0
- Reading
- counts consistent, some coordinates doubtful
- File
- 19810727.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 1 | 11 | 41W | 9 ⚠ | 74W | 15 | |
| 2 | FKC – 7 | 15 | 70W | 8 | 43W | 10 | |
| 3 | AXX – 4 | 7 | 43W | 34 ⚠ | 46W | 3 | |
| 4 | BXI – 10 | 12 | 23E | 275 | 20E | 8 | |
| 5 | HAX – 1 | 14 | 78E | 220 | 75E | 2 | |
| 6 | HSX – 1 | -18 | 59W | 357 | 62W | 1 | |
| 7 | HKX – 15 | -7 | 12W | 341 ⚠ | 46W | 65 | |
| 8 | DAI – 16 | -19 | 43W | 34 ⚠ | 46W | 8 | |
| 9 | CAO – 9 | -19 | 25W | 203 ⚠ | 28W | 95 | |
| 10 | FKC – 120 | -12 | 11E | 287 | 08E | 23 | |
| 11 | HSX – 1 | -19 | 14E | 284 | 11E | 2 | |
| 12 | HAX – 1 | -3 | 24E | 274 | 21E | 2 | |
| 13 | DAI – 12 | -7 | 78E | 250 ⚠ | 25E | 75 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.