Daily Sunspot Evaluation
Observation Sheet Thursday, 21 November 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)
- 8
- Number of spots (f)
- 38
- Relative number (R)
- 118
- Observer
- TK
- Reading
- all checks consistent
- File
- 19911121.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 1 | 7 | 04E | 227 | 01E | — | 635 |
| 2 | CAI – 4 | 25 | 45E | 186 | 42E | 6 | 626 |
| 3 | I – 5 | 17 | 75E | 156 | 72E | 8.5 | 647 |
| 4 | BXI – 7 | -8 | 19W | 250 | 22W | 4.5 | 643 |
| 5 | CAO – 11 | -16 | 05W | 236 | 08W | 9.5 | 639 |
| 6 | DAO – 5 | -11 | 34E | 197 | 31E | 9 | 640 |
| 7 | AX – 2 | -7 | 50E | 181 | 47E | 2 | 641 |
| 8 | HA – 3 | -11 | 52E | 179 | 49E | 1.5 | 645 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.