Daily Sunspot Evaluation
Observation Sheet Saturday, 13 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)
- 88
- Relative number (R)
- 178
- Observer
- DK
- Reading
- all checks consistent
- File
- 19680713.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 55 | 11 | 0 | 151 | |||
| 2 | J – 1 | 25 | 66E | 85 | |||
| 3 | H – 5 | 13 | 60E | 91 | |||
| 4 | H – 1 | -15 | 40E | 111 | |||
| 5 | A – 2 | -30 | 34E | 117 | |||
| 6 | B – 9 | -18 | 0 | 151 | |||
| 7 | A – 2 | -17 | 30W | 181 | |||
| 8 | H – 5 | 10 | 28W | 179 | |||
| 9 | H – 8 | 28 | 03W | 154 | 1 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.