Daily Sunspot Evaluation
Observation Sheet Sunday, 23 June 1991
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)
- 42
- Relative number (R)
- 142
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19910623.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 3 | 8 | 26W | 92 | 29W | 3 | 302 |
| 2 | CAO – 8 | 15 | 18W | 84 | 21W | 8 | 313 |
| 3 | HA – 5 | 22 | 17E | 49 | 14E | 2 | 310 |
| 4 | DAO – 3 | -10 | 70W | 136 | 73W | 7 | 304 |
| 5 | BRI – 5 | -13 | 59W | 125 | 62W | 6 | 320 |
| 6 | DAO – 6 | -29 | 34W | 100 | 37W | 7.5 | 317 |
| 7 | BRI – 7 | -16 | 10E | 56 | 07E | 6 | 314 |
| 8 | AX – 1 | -26 | 49E | 17 | 46E | 319 | |
| 9 | AX – 2 | -10 | 69E | 357 | 66E | 2.5 | 322 |
| 10 | BXO – 2 | -7 | 75E | 351 | 72E | 8 | 323 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.