Daily Sunspot Evaluation
Observation Sheet Thursday, 2 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)
- 10
- Number of spots (f)
- 65
- Relative number (R)
- 165
- Observer
- AÖ0
- Reading
- counts consistent, some coordinates doubtful
- File
- 19810702.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXO – 3 | 12 | 58W | 324 | 58W | 7 | |
| 2 | AXX – 2 | 19 | 40W | 306 | 40W | 0.75 | |
| 3 | HAX – 2 | 18 | 02W | 268 | 02W | 2 | |
| 4 | BXO – 3 | 10 | 07E | 259 | 07E | 3.5 | |
| 5 | AXX – 1 | -17 | 69W | 335 | 69W | 1 | |
| 6 | BXO – 4 | -8 | 62W | 328 | 62W | 5 | |
| 7 | DRO – 10 | -7 | 29W | 295 | 29W | 8.5 | |
| 8 | FKC – 28 | -16 | 14W | 280 | 14W | 20 | |
| 9 | BXO – 2 | -23 | 18W | 279 ⚠ | 18W | 4 | |
| 10 | DAI – 10 | -16 | 02E | 264 | 02E | 6.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.