Daily Sunspot Evaluation
Observation Sheet Saturday, 21 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)
- 5
- Number of spots (f)
- 30
- Relative number (R)
- 80
- Observer
- FY
- Reading
- all checks consistent
- File
- 19560721.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 2 | -21 | 45E | ||||
| 2 | J – 1 | -22 | 12E | ||||
| 3 | J – 1 | -15 | 9W | ||||
| 4 | B – 2 | -33 | 26W | ||||
| 5 | D – 24 | 26 | 35W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.