Daily Sunspot Evaluation
Observation Sheet Sunday, 17 July 1960
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)
- 8
- Number of spots (f)
- 73
- Relative number (R)
- 153
- Observer
- FY
- Reading
- all checks consistent
- File
- 19600717.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 3 | 24 | 72E | ||||
| 2 | A – 7 | 14 | 60E | ||||
| 3 | A – 3 | 10 | 50E | ||||
| 4 | A – 1 | -18 | 44E | ||||
| 5 | J – 2 | -16 | 15E | ||||
| 6 | D – 8 | 3 | 32W | ||||
| 7 | J – 1 | 20 | 53W | ||||
| 8 | F – 48 | 21 | 7W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.