Daily Sunspot Evaluation
Observation Sheet Saturday, 18 June 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)
- 21
- Relative number (R)
- 101
- Observer
- BG
- Reading
- all checks consistent
- File
- 19600618.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 16 | 2E | ||||
| 2 | J – 2 | 21 | 32E | ||||
| 3 | J – 1 | 12 | 38E | ||||
| 4 | A – 1 | 8 | 18E | ||||
| 5 | A – 1 | -15 | 49E | ||||
| 6 | C – 8 | -13 | 36W | ||||
| 7 | C – 6 | 21 | 54W | ||||
| 8 | A – 1 | 22 | 5W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.