Daily Sunspot Evaluation
Observation Sheet Tuesday, 23 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)
- 9
- Number of spots (f)
- 31
- Relative number (R)
- 121
- Observer
- SM
- Reading
- all checks consistent
- File
- 19810623.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 1 | 10 | 79W | 104 | 79W | ||
| 2 | AXX – 1 | 16 | 21W | 46 | 21W | ||
| 3 | EKX – 17 | 14 | 30E | 355 | 30E | 10 | |
| 4 | BXO – 2 | 24 | 64E | 321 | 64E | 35 | |
| 5 | DAO – 4 | -20 | 70W | 95 | 70W | 10 | |
| 6 | HAX – 2 | -13 | 12E | 13 | 12E | 2 | |
| 7 | AXX – 1 | -17 | 32E | 353 | 32E | ||
| 8 | HAX – 2 | -9 | 47E | 338 | 47E | 2 | |
| 9 | HAX – 1 | -6 | 57E | 328 | 57E | 1.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.