Daily Sunspot Evaluation
Observation Sheet Friday, 19 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)
- 7
- Number of spots (f)
- 23
- Relative number (R)
- 93
- Observer
- AT
- Reading
- counts consistent, some coordinates doubtful
- File
- 19680719.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 3 | 17 | 76E | 335 ⚠ | |||
| 2 | D – 7 | 10 | 65E | 6 | |||
| 3 | J – 2 | -17 | 35E | 36 | |||
| 4 | A – 2 | -19 | 17E | 54 | |||
| 5 | H – 1 | -14 | 40W | 111 | |||
| 6 | A – 2 | 15 | 45W | 116 | |||
| 7 | H – 6 | 13 | 22W | 33 ⚠ |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.