Daily Sunspot Evaluation
Observation Sheet Wednesday, 21 July 2004
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)
- 5
- Number of spots (f)
- 85
- Relative number (R)
- 135
- Observer
- ZFB
- Reading
- all checks consistent
- File
- 20040721.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 12 | 65W | 79 | 68W | 2 | 131 |
| 2 | FKC – 44 | 8 | 28E | 346 | 25E | 16 | 141 |
| 3 | BXO – 2 | -16 | 41W | 55 | 44W | 6.5 | 143 |
| 4 | CKI – 24 | -10 | 29W | 43 | 32W | 19 | 139 |
| 5 | CAI – 14 | -13 | 29E | 345 | 26E | 8 | 142 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.