Daily Sunspot Evaluation
Observation Sheet Saturday, 28 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)
- 86
- Relative number (R)
- 186
- Observer
- TA
- Reading
- all checks consistent
- File
- 20010428.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | FKC – 52 | 17 | 40W | 152 | 43W | 28 | |
| 2 | HR – 3 | 9 | 09W | 121 | 12W | 7 | |
| 3 | BXO – 3 | 7 | 01E | 111 | 02W | 3.5 | |
| 4 | DAC – 20 | 6 | 34E | 78 | 31E | 8.5 | |
| 5 | HA – 1 | 27 | 44E | 68 | 41E | 2 | |
| 6 | ? – 1 | 23 | 81E | 31 | 78E | ||
| 7 | ? – 1 | -21 | 83W | 195 | 86W | ||
| 8 | AX – 1 | -20 | 59W | 171 | 62W | ||
| 9 | HA – 2 | -10 | 10W | 122 | 13W | 2 | |
| 10 | BXO – 2 | -11 | 74E | 38 | 71E | 4 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.