Daily Sunspot Evaluation
Observation Sheet Tuesday, 17 May 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)
- 6
- Number of spots (f)
- 78
- Relative number (R)
- 138
- Observer
- ET
- Reading
- all checks consistent
- File
- 19600517.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 3 | 6 | 9E | ||||
| 2 | C – 8 | 19 | 53E | ||||
| 3 | F – 28 | -12 | 34E | ||||
| 4 | J – 2 | -9 | 48W | ||||
| 5 | A – 1 | 13 | 35W | ||||
| 6 | C – 36 | 15 | 8W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.