Daily Sunspot Evaluation
Observation Sheet Tuesday, 24 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)
- 12
- Number of spots (f)
- 95
- Relative number (R)
- 215
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19910924.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 2 | 84W | 1 | 87W | 3 | 502 |
| 2 | CAI – 5 | 8 | 70W | 347 | 73W | 17.5 | 505 |
| 3 | CAI – 22 | 10 | 24W | 301 | 27W | 5.5 | 521 |
| 4 | BXI – 12 | 6 | 15E | 262 | 12E | 5.5 | 527 |
| 5 | AX – 1 | -25 | 68W | 345 | 71W | - | 531 |
| 6 | CAI – 14 | -12 | 66W | 343 | 69W | 8 | 526 |
| 7 | AX – 2 | -24 | 58W | 335 | 61W | 0.5 | 533 |
| 8 | BXO – 14 | -10 | 28W | 305 | 31W | 5 | 528 |
| 9 | BXI – 18 | -10 | 22E | 255 | 19E | 9.5 | 529 |
| 10 | AX – 1 | -24 | 56E | 221 | 53E | - | 534 |
| 11 | AX – 1 | -22 | 67E | 210 | 64E | - | 535 |
| 12 | ? – 4 | -9 | 76E | 201 | 73E | 8.5 | 536 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.