Daily Sunspot Evaluation
Observation Sheet Tuesday, 20 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)
- 89
- Relative number (R)
- 139
- Observer
- TG
- Reading
- all checks consistent
- File
- 20040720.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 2 | 12 | 53W | 80 | 56W | ~2.5 | 131 |
| 2 | FKC – 43 | 8 | 42E | 345 | 39E | 16 | 141 |
| 3 | AX – 1 | -17 | 24W | 51 | 27W | - | 143 |
| 4 | CKI – 32 | -9 | 12W | 39 | 15W | 18 | 139 |
| 5 | OKC – 11 | -12 | 41E | 344 | 38E | 6 | 142 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.