Daily Sunspot Evaluation
Observation Sheet Wednesday, 19 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)
- 9
- Number of spots (f)
- 15
- Relative number (R)
- 105
- Observer
- MH
- Reading
- all checks consistent
- File
- 19580219.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 2 | -13 | 60E | ||||
| 2 | H – 2 | -17 | 37E | ||||
| 3 | J – 2 | -15 | 19E | ||||
| 4 | J – 1 | -25 | 51E | ||||
| 5 | J – 1 | -15 | 19W | ||||
| 6 | A – 2 | 5 | 58W | ||||
| 7 | ? – 2 | 10 | 78W | ||||
| 8 | G – 2 | 6 | 10W | ||||
| 9 | J – 1 | 23 | 19W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.