Daily Sunspot Evaluation
Observation Sheet Sunday, 16 February 1958
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)
- 12
- Number of spots (f)
- 63
- Relative number (R)
- 183
- Observer
- AK
- Reading
- all checks consistent
- File
- 19580216.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 23 | 18E | ||||
| 2 | B – 9 | 20 | 56E | ||||
| 3 | C – 5 | 6 | 28E | ||||
| 4 | A – 1 | -10 | 48E | ||||
| 5 | A – 2 | -14 | 57E | ||||
| 6 | ? – 2 | -15 | 75E | ||||
| 7 | A – 2 | -18 | 75E | ||||
| 8 | B – 6 | 9 | 60W | ||||
| 9 | E – 21 | 11 | 41W | ||||
| 10 | C – 6 | 21 | 38W | ||||
| 11 | A – 2 | 24 | 31W | ||||
| 12 | D – 5 | 13 | 8W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.