Daily Sunspot Evaluation
Observation Sheet Monday, 17 July 1978
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)
- 6
- Number of spots (f)
- 61
- Relative number (R)
- 121
- Observer
- HM
- Reading
- all checks consistent
- File
- 19780717.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 6 | 13 | 10E | 123 | 10E | ||
| 2 | A – 2 | -28 | 31E | 102 | 31E | ||
| 3 | J – 1 | -23 | 10E | 123 | 10E | ||
| 4 | E – 41 | 17 | 35W | 168 | 35W | ||
| 5 | D – 9 | 16 | 08W | 141 | 08W | ||
| 6 | A – 2 | 11 | 03W | 136 | 03W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.