Daily Sunspot Evaluation
Observation Sheet Friday, 27 September 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)
- 68
- Relative number (R)
- 148
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19910927.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 2 | 10 | 65W | 302 | 68W | 4 | 521 |
| 2 | BXO – 10 | 11 | 41W | 278 | 44W | 7 | 537 |
| 3 | BXO – 7 | -10 | 20W | 257 | 23W | 7.5 | 529 |
| 4 | AX – 2 | -21 | 28E | 209 | 25E | 0.5 | 535 |
| 5 | DAO – 19 | -7 | 36E | 201 | 33E | 11 | 536 |
| 6 | FKO – 21 | -12 | 55E | 182 | 52E | 21 | 539 |
| 7 | AX – 1 | -20 | 56E | 181 | 53E | - | 541 |
| 8 | ? – 6 | -20 | 68E | 169 | 65E | 6 | 540 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.