Daily Sunspot Evaluation
Observation Sheet Tuesday, 30 June 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)
- 12
- Number of spots (f)
- 123
- Relative number (R)
- 243
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19810630.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKI – 17 | 13 | 64W | 359 | 67W | 12.5 | |
| 2 | CAO – 11 | 19 | 05W | 300 | 08W | 10 | |
| 3 | AXX – 2 | 18 | 05E | 290 | 02E | 2.5 | |
| 4 | HAX – 1 | 18 | 28E | 267 | 25E | 2 | |
| 5 | ? – 2 | -21 | 77W | 12 | 80W | 4 | |
| 6 | RXX – 3 | -6 | 39W | 334 | 42W | 1 | |
| 7 | ARX – 1 | -14 | 35W | 330 | 38W | 1 | |
| 8 | RXX – 1 | -9 | 29W | 324 | 32W | - | |
| 9 | CAI – 14 | -7 | 02E | 293 | 01W | 5 | |
| 10 | FKC – 63 | -16 | 16E | 279 | 13E | 21 | |
| 11 | BXI – 5 | -16 | 33E | 262 | 30E | 3.5 | |
| 12 | HXX – 3 | -4 | 38E | 257 | 35E | 2.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.