Daily Sunspot Evaluation
Observation Sheet Wednesday, 21 April 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)
- 6
- Number of spots (f)
- 84
- Relative number (R)
- 144
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19930421.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXO – 5 | 5 | 13E | 238 | 10E | 5 | 96 |
| 2 | DAC – 27 | 10 | 21E | 230 | 18E | 9.5 | 93 |
| 3 | BXO – 5 | -6 | 30W | 281 | 33W | 4 | 94 |
| 4 | CRI – 20 | -14 | 00 | 251 | 03W | 8.5 | 97 |
| 5 | BXI – 8 | -11 | 09E | 242 | 06E | 5 | 100 |
| 6 | DAC – 19 | -13 | 40E | 211 | 37E | 9.5 | 37 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.