Daily Sunspot Evaluation
Observation Sheet Wednesday, 17 February 1993
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)
- 5
- Number of spots (f)
- 29
- Relative number (R)
- 79
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19930217.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 1 | 10 | 28W | 29 | 30W | 1.5 | 42 |
| 2 | DAC – 14 | 16 | 07E | 354 | 05E | 4.5 | 41 |
| 3 | HA – 11 | -21 | 40E | 321 | 38E | 3 | 40 |
| 4 | AX – 2 | -5 | 50E | 311 | 48E | - | 45 |
| 5 | HA – 1 | -14 | 67E | 294 | 65E | 2 | 43 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.