Daily Sunspot Evaluation
Observation Sheet Friday, 12 July 1968
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)
- 9
- Number of spots (f)
- 114
- Relative number (R)
- 204
- Observer
- AT
- Reading
- all checks consistent
- File
- 19680712.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 80 | 10 | 10E | 154 | |||
| 2 | B – 5 | 28 | 9E | 155 | |||
| 3 | ? – 1 | 26 | 80E | 84 | |||
| 4 | H – 4 | 13 | 73E | 91 | |||
| 5 | J – 1 | 14 | 53E | 111 | |||
| 6 | B – 6 | -30 | 40E | 124 | |||
| 7 | B – 7 | -17 | 12E | 152 | |||
| 8 | J – 2 | -17 | 17W | 181 | |||
| 9 | H – 8 | -9 | 19W | 183 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.