Daily Sunspot Evaluation
Observation Sheet Tuesday, 17 March 1998
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)
- 3
- Number of spots (f)
- 39
- Relative number (R)
- 69
- Observer
- TÇ
- Reading
- all checks consistent
- File
- 19980317.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 2 | -17 | 10Ω | 21 | 12Ω | 2 | 248 |
| 2 | FKC – 34 | -23 | 20Ω | 31 | 22Ω | 14 | 248 |
| 3 | CAO – 3 | -41 | 44Ω | 55 | 46Ω | 6 | 248 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.