Daily Sunspot Evaluation
Observation Sheet Sunday, 13 January 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)
- 9
- Number of spots (f)
- 100
- Relative number (R)
- 190
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19910113.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXO – 5 | 7 | 19W | 49 | 21W | 5 | 21 |
| 2 | BXO – 6 | 13 | 16W | 46 | 18W | 5 | 25 |
| 3 | FKI – 49 | 15 | 11E | 19 | 09E | 21 | 22 |
| 4 | AX – 1 | -14 | 65W | 95 | 67W | - | 29 |
| 5 | BXI – 8 | -35 | 36W | 66 | 38W | 5 | 26 |
| 6 | AX – 5 | -14 | 43E | 347 | 41E | 3.5 | 30 |
| 7 | CAI – 17 | -7 | 44E | 346 | 42E | 10 | 27 |
| 8 | BXI – 6 | -21 | 52E | 338 | 50E | 5.5 | 31 |
| 9 | BXI – 3 | -8 | 56E | 334 | 54E | 6 | 28 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.