Daily Sunspot Evaluation
Observation Sheet Tuesday, 21 May 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)
- 110
- Relative number (R)
- 200
- Observer
- ıH
- Reading
- counts consistent, some coordinates doubtful
- File
- 20020521.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 4 | 04E | 25 | 02E | 1.5 | |
| 2 | DKC – 75 | 8 | 17E | 12 | 15E | 8.5 | |
| 3 | HA – 5 | 14 | 43E | 246 ⚠ | 41E | ~3 | |
| 4 | HA – 1 | 14 | 54E | 335 | 52E | ~1 | |
| 5 | HA – 1 | 17 | 67E | 322 | 65E | ~1.5 | |
| 6 | HH – 1 | -21 | 61W | 90 | 63W | ~4 | |
| 7 | DAC – 9 | -22 | 03W | 32 | 05W | 5.5 | |
| 8 | HA – 3 | -14 | 02W | 31 | 04W | 2 | |
| 9 | EAC – 14 | -22 | 55E | 334 | 57E | 13 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.