Daily Sunspot Evaluation
Observation Sheet Sunday, 17 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)
- 101
- Relative number (R)
- 161
- Observer
- TA
- Reading
- all checks consistent
- File
- 20000917.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 14 | 5 | 18W | 189 | 21W | 6 | |
| 2 | DKC – 42 | 14 | 17W | 188 | 20W | ~7 | |
| 3 | AX – 4 | 9 | 16E | 155 | 13E | 2 | |
| 4 | ? – 4 | 12 | 79E | 92 | 76E | - | |
| 5 | CRO – 6 | -14 | 62W | 233 | 65W | ~5 | |
| 6 | EAI – 31 | -13 | 48E | 123 | 45E | ~11 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.