Daily Sunspot Evaluation
Observation Sheet Monday, 18 September 2000
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)
- 6
- Number of spots (f)
- 113
- Relative number (R)
- 173
- Observer
- HE
- Reading
- all checks consistent
- File
- 20000918.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DRO – 11 | 5 | 32W | 190 | 35W | 6 | |
| 2 | DAC – 42 | 13 | 30W | 188 | 33W | 8 | |
| 3 | ERI – 12 | 13 | 69E | 89 | 66E | 14 | |
| 4 | ? – 7 | 9 | 80E | 78 | 77E | - | |
| 5 | ? – 1 | -15 | 79W | 237 | 82W | 0.5 | |
| 6 | EKC – 40 | -13 | 35E | 123 | 32E | 11 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.