Daily Sunspot Evaluation
Observation Sheet Monday, 23 April 2001
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)
- 7
- Number of spots (f)
- 71
- Relative number (R)
- 141
- Observer
- MB
- Reading
- counts consistent, some coordinates doubtful
- File
- 20010423.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 9 | 49W | 226 | 51W | ~01 | |
| 2 | DAO – 6 | 8 | 38W | 215 | 40W | 8 | |
| 3 | FKC – 47 | 17 | 23E | 154 | 21E | 22 | |
| 4 | HS – 1 | 9 | 58E | 59 ⚠ | 56E | ~1.5 | |
| 5 | HA – 2 | -11 | 20W | 197 | 22W | ~1 | |
| 6 | DAO – 10 | -20 | 16W | 193 | 18W | ~10 | |
| 7 | DSO – 4 | -11 | 57E | 60 ⚠ | 55E | 6 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.