Daily Sunspot Evaluation
Observation Sheet Friday, 17 February 1967
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)
- 15
- Relative number (R)
- 65
- Observer
- LT
- Reading
- counts consistent, some coordinates doubtful
- File
- 19670217.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 16 | 47E | 28 ⚠ | |||
| 2 | G – 2 | 22 | 62E | 7 | |||
| 3 | J – 2 | -25 | 31E | 38 | |||
| 4 | D – 9 | 15 | 4W | 110 ⚠ | |||
| 5 | A – 1 | 12 | 17W | 86 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.