Daily Sunspot Evaluation
Observation Sheet Saturday, 21 July 2001
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)
- 7
- Number of spots (f)
- 45
- Relative number (R)
- 115
- Observer
- TÇ
- Reading
- all checks consistent
- File
- 20010721.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 6 | 62W | 142 | 65W | ~3 | |
| 2 | HS – 1 | 16 | 41W | 121 | 44W | ~3 | |
| 3 | AX – 6 | 9 | 33W | 113 | 36W | 2.5 | |
| 4 | HK – 2 | 18 | 28W | 108 | 31W | 1 | |
| 5 | DSO – 9 | 17 | 19E | 61 | 16E | 6.5 | |
| 6 | HR – 2 | -15 | 05W | 85 | 08W | ~2 | |
| 7 | EAC – 24 | -23 | 05E | 75 | 02E | ~15 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.