Daily Sunspot Evaluation
Observation Sheet Friday, 13 July 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)
- 11
- Number of spots (f)
- 63
- Relative number (R)
- 173
- Observer
- FY
- Reading
- all checks consistent
- File
- 19560713.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 33 | 18E | ||||
| 2 | D – 20 | 19 | 9E | ||||
| 3 | A – 1 | 36 | 29E | ||||
| 4 | B – 2 | 32 | 26E | ||||
| 5 | D – 6 | 15 | 49E | ||||
| 6 | C – 3 | -28 | 35W | ||||
| 7 | G – 2 | -23 | 37W | ||||
| 8 | E – 7 | 19 | 45WE | ||||
| 9 | J – 1 | 24 | 38W | ||||
| 10 | E – 18 | 13 | 14W | ||||
| 11 | A – 1 | 28 | 22W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.