Daily Sunspot Evaluation
Observation Sheet Thursday, 17 February 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)
- 8
- Number of spots (f)
- 54
- Relative number (R)
- 134
- Observer
- TÇ
- Reading
- all checks consistent
- File
- 20000217.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 2 | 18 | 05W | 110 | 08W | ~2 | |
| 2 | CRI – 15 | -17 | 65W | 170 | 68W | 9 | |
| 3 | AX – 2 | -24 | 66W | 171 | 69W | - | |
| 4 | HS – 1 | -6 | 64W | 169 | 67W | ~2 | |
| 5 | DRO – 7 | -27 | 46W | 151 | 48W | ~6 | |
| 6 | DRI – 17 | -23 | 13W | 118 | 10W | ~10 | |
| 7 | CRO – 4 | -23 | 37E | 68 | 34E | 6.5 | |
| 8 | DRO – 6 | -13 | 44E | 61 | 41E | ~5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.