Daily Sunspot Evaluation
Observation Sheet Saturday, 18 August 1956
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)
- 77
- Relative number (R)
- 207
- Observer
- ET
- Reading
- all checks consistent
- File
- 19560818.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 47 | 57E | ||||
| 2 | J – 2 | 20 | 28E | ||||
| 3 | B – 8 | 26 | 43E | ||||
| 4 | A – 1 | 22 | 66E | ||||
| 5 | C – 7 | -21 | 70E | ||||
| 6 | B – 7 | -22 | 50E | ||||
| 7 | D – 15 | -18 | 25E | ||||
| 8 | A – 3 | -17 | 30W | ||||
| 9 | E – 19 | -18 | 41W | ||||
| 10 | C – 3 | 23 | 75W | ||||
| 11 | A – 1 | 25 | 26W | ||||
| 12 | A – 3 | 27 | 37W | ||||
| 13 | B – 7 | 28 | 19W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.