Daily Sunspot Evaluation
Observation Sheet Friday, 17 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)
- 14
- Number of spots (f)
- 50
- Relative number (R)
- 190
- Observer
- MS
- Reading
- all checks consistent
- File
- 20010817.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 2 | 13 | 80W | 163 | 83W | ~5 | |
| 2 | CAO – 4 | 11 | 07E | 76 | 04E | ~9 | |
| 3 | AX – 1 | 7 | 18E | 65 | 15E | - | |
| 4 | HA – 2 | 24 | 44E | 39 | 41E | 3 | |
| 5 | AX – 5 | 30 | 55E | 28 | 52E | 2 | |
| 6 | BXO – 3 | 15 | 56E | 29 | 53E | 4 | |
| 7 | BXI – 9 | 15 | 73E | 10 | 70E | ~10 | |
| 8 | HA – 1 | -4 | 82W | 165 | 85W | 1.5 | |
| 9 | HA – 1 | -11 | 82W | 165 | 85W | 2 | |
| 10 | AX – 3 | -24 | 40W | 123 | 43W | 0.5 | |
| 11 | HA – 1 | -9 | 39W | 122 | 42W | 1 | |
| 12 | BXO – 2 | -18 | 38W | 121 | 41W | 1 | |
| 13 | BXI – 9 | -27 | 28W | 111 | 31W | 6 | |
| 14 | BXI – 7 | -12 | 61E | 22 | 58E | 13 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.