Daily Sunspot Evaluation
Observation Sheet Tuesday, 21 September 1993
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)
- 2
- Number of spots (f)
- 7
- Relative number (R)
- 27
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19930921.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXO – 6 | -14 | 07W | 31 | 06W | 7.5 | 234 |
| 2 | AX – 1 | -9 | 52E | 332 | 53E | 0.5 | 238 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.