Daily Sunspot Evaluation
Observation Sheet Friday, 27 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)
- 10
- Number of spots (f)
- 96
- Relative number (R)
- 196
- Observer
- AK0
- Reading
- all checks consistent
- File
- 20010427.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | FKC – 54 | 16 | 27W | 152 | 30W | 25 | |
| 2 | HA – 4 | 9 | 05E | 120 | 02E | ~3 | |
| 3 | BXI – 7 | 7 | 15E | 110 | 12E | 3.5 | |
| 4 | CAI – 17 | 8 | 47E | 78 | 44E | 7 | |
| 5 | HA – 2 | 28 | 58E | 67 | 55E | ~2 | |
| 6 | HR – 1 | -12 | 72W | 197 | 75W | ~1 | |
| 7 | CAO – 6 | -21 | 66W | 191 | 69W | 7 | |
| 8 | HS – 1 | -21 | 44W | 169 | 47W | 1 | |
| 9 | HA – 1 | -11 | 04E | 121 | 01E | ~3 | |
| 10 | BXO – 3 | -11 | 31E | 94 | 28E | 3 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.