Daily Sunspot Evaluation
Observation Sheet Monday, 15 April 2002
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)
- 12
- Number of spots (f)
- 71
- Relative number (R)
- 191
- Observer
- AK0
- Reading
- all checks consistent
- File
- 20020415.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | FKC – 9 | 19 | 64W | 209 | 67W | ~21 | 148 |
| 2 | AX – 2 | 4 | 60W | 205 | 63W | ~1 | |
| 3 | HS – 4 | 19 | 34W | 179 | 37W | 3 | |
| 4 | CSO – 4 | 11 | 18W | 163 | 21W | 4.5 | |
| 5 | BXI – 4 | 14 | 08W | 153 | 11W | 3 | |
| 6 | HS – 1 | 6 | 65E | 80 | 62E | ~2 | |
| 7 | DAO – 4 | -15 | 60W | 205 | 63W | 7.5 | |
| 8 | HS – 1 | -10 | 50W | 195 | 53W | 2 | |
| 9 | EKC – 20 | -15 | 05W | 150 | 08W | ~14 | |
| 10 | AX – 1 | -15 | 10E | 135 | 07E | ~ | |
| 11 | EAC – 18 | -4 | 30E | 115 | 27E | 10.5 | |
| 12 | BAO – 3 | -20 | 62E | 83 | 59E | ~3 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.