Daily Sunspot Evaluation
Observation Sheet Saturday, 6 July 1957
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)
- 17
- Number of spots (f)
- 103
- Relative number (R)
- 273
- Observer
- MH
- Reading
- all checks consistent
- File
- 19570706.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 5 | 25 | 18E | ||||
| 2 | B – 15 | 13 | 18E | ||||
| 3 | ? – 1 | 32 | 76E | ||||
| 4 | D – 9 | -13 | 54E | ||||
| 5 | A – 3 | -23 | 12E | ||||
| 6 | E – 30 | -30 | 13W | ||||
| 7 | J – 2 | -16 | 9W | ||||
| 8 | A – 2 | -25 | 21W | ||||
| 9 | J – 1 | -15 | 37W | ||||
| 10 | C – 8 | -11 | 52W | ||||
| 11 | A – 1 | -15 | 65W | ||||
| 12 | ? – 3 | 10 | 80W | ||||
| 13 | D – 8 | 11 | 26W | ||||
| 14 | J – 2 | 14 | 15W | ||||
| 15 | C – 9 | 14 | 7W | ||||
| 16 | B – 3 | 27 | 29W | ||||
| 17 | A – 1 | 20 | 6W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.