Daily Sunspot Evaluation
Observation Sheet Tuesday, 15 September 1992
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)
- 5
- Number of spots (f)
- 57
- Relative number (R)
- 107
- Observer
- MB
- Reading
- counts consistent, some coordinates doubtful
- File
- 19920915.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 2 | 12 | 88W | 325 ⚠ | 83W | 03 | 328 |
| 2 | CAI – 33 | 16 | 16W | 261 | 19W | 10 | 320 |
| 3 | DAO – 8 | -18 | 50W | 295 | 53W | 10 | 324 |
| 4 | HS – 13 | -14 | 23E | 222 | 20E | 05 | 324 |
| 5 | ? – 1 | -15 | 89E | 165 ⚠ | 77 | - | 330 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.