Daily Sunspot Evaluation
Observation Sheet Saturday, 18 August 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)
- 10
- Number of spots (f)
- 62
- Relative number (R)
- 162
- Observer
- SB0
- Reading
- all checks consistent
- File
- 20010818.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CSI – 7 | 11 | 07W | 77 | 10W | 8 | |
| 2 | HS – 1 | 24 | 31E | 39 | 28E | ~2 | |
| 3 | CSI – 14 | 28 | 42E | 28 | 39E | 4 | |
| 4 | CKI – 22 | 15 | 61E | 9 | 58E | 10 | |
| 5 | AX – 2 | -16 | 55W | 125 | 58W | ~2 | |
| 6 | HS – 1 | -9 | 53W | 123 | 56W | 1 | |
| 7 | AX – 2 | -23 | 52W | 122 | 55W | 1 | |
| 8 | AX – 1 | -18 | 51W | 121 | 54W | - | |
| 9 | CAI – 3 | -26 | 43W | 113 | 46W | 5.5 | |
| 10 | EAI – 9 | -12 | 47E | 23 | 44E | 12 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.