Daily Sunspot Evaluation
Observation Sheet Thursday, 15 August 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)
- 10
- Number of spots (f)
- 80
- Relative number (R)
- 180
- Observer
- LT
- Reading
- all checks consistent
- File
- 19680815.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 1 | 6 | 58E | 16 | |||
| 2 | E – 10 | -13 | 63E | 11 | |||
| 3 | E – 26 | -15 | 41E | 33 | |||
| 4 | J – 2 | -17 | 18E | 56 | |||
| 5 | A – 2 | -13 | 32W | 106 | |||
| 6 | D – 9 | -26 | 70W | 144 | |||
| 7 | C – 4 | -8 | 42W | 116 | |||
| 8 | D – 7 | -1 | 66W | 140 | |||
| 9 | ? – 2 | 12 | 88W | 162 | |||
| 10 | D – 17 | 17 | 24W | 98 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.