Daily Sunspot Evaluation
Observation Sheet Wednesday, 21 July 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)
- 5
- Number of spots (f)
- 34
- Relative number (R)
- 84
- Observer
- —
- Reading
- all checks consistent
- File
- 19930721.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 6 | 8 | 05E | 120 | 04E | 1.5 | 186 |
| 2 | CRO – 3 | -18 | 61W | 186 | 62W | 7 | 189 |
| 3 | HS – 2 | -12 | 19E | 106 | 18E | 3 | 187 |
| 4 | DAI – 20 | -20 | 23E | 102 | 22E | 6 | 188 |
| 5 | DRO – 3 | -10 | 43E | 82 | 42E | 5.5 | 190 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.