Daily Sunspot Evaluation
Observation Sheet Sunday, 16 March 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)
- 13
- Number of spots (f)
- 108
- Relative number (R)
- 238
- Observer
- ET
- Reading
- all checks consistent
- File
- 19580316.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 16 | 13E | ||||
| 2 | C – 8 | 36 | 47E | ||||
| 3 | A – 3 | 18 | 58E | ||||
| 4 | E – 40 | 12 | 29E | ||||
| 5 | ? – 1 | -6 | 80E | ||||
| 6 | A – 1 | -12 | 56E | ||||
| 7 | ? – 1 | -17 | 77E | ||||
| 8 | J – 1 | -23 | 57E | ||||
| 9 | B – 4 | -13 | 54W | ||||
| 10 | A – 2 | 13 | 65W | ||||
| 11 | C – 7 | 10 | 49W | ||||
| 12 | F – 37 | 13 | 38W | ||||
| 13 | A – 1 | 45 | 32W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.