Daily Sunspot Evaluation
Observation Sheet Monday, 22 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)
- 9
- Number of spots (f)
- 69
- Relative number (R)
- 159
- Observer
- ZFB
- Reading
- all checks consistent
- File
- 20020422.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 2 | 7 | 28W | 81 | 31W | 2 | |
| 2 | DAC – 18 | 9 | 16W | 69 | 19W | 7 | |
| 3 | AX – 1 | 5 | 10E | 43 | 07E | ||
| 4 | DAO – 8 | 4 | 40E | 13 | 37E | ~7.5 | |
| 5 | DAO – 9 | 11 | 51E | 2 | 48E | ~5.5 | |
| 6 | CSO – 10 | -21 | 35W | 88 | 38W | ~12 | |
| 7 | HA – 9 | -15 | 08W | 61 | 11W | ~3 | |
| 8 | HR – 2 | -29 | 54E | 359 | 51E | ~1 | |
| 9 | EAO – 10 | -17 | 68E | 345 | 65E | ~13 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.