Daily Sunspot Evaluation
Observation Sheet Monday, 23 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)
- 9
- Number of spots (f)
- 74
- Relative number (R)
- 164
- Observer
- ZFB
- Reading
- all checks consistent
- File
- 20010723.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 3 | 17 | 68W | 121 | 71W | ~2 | |
| 2 | DAO – 6 | 9 | 61W | 114 | 64W | 7 | |
| 3 | HA – 2 | 20 | 54W | 107 | 57W | 1 | |
| 4 | CSO – 9 | 19 | 06W | 59 | 09W | 9 | |
| 5 | CSO – 3 | 13 | 26E | 29 | 23E | ~4 | |
| 6 | DXO – 2 | 27 | 34E | 19 | 31E | ~2 | |
| 7 | CSO – 5 | 13 | 45E | 8 | 42E | ~3 | |
| 8 | DSO – 2 | -13 | 34W | 87 | 39W | 2 | |
| 9 | ESC – 42 | -21 | 20W | 73 | 27W | 14.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.