Daily Sunspot Evaluation
Observation Sheet Friday, 21 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)
- 9
- Number of spots (f)
- 35
- Relative number (R)
- 125
- Observer
- GA
- Reading
- all checks consistent
- File
- 19780721.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | -15 | 10E | 73 | 07E | ||
| 2 | B – 2 | -23 | 11E | 72 | 08E | ||
| 3 | B – 6 | -39 | 36W | 119 | 39W | ||
| 4 | J – 1 | -24 | 39W | 122 | 42W | ||
| 5 | A – 2 | 9 | 48W | 131 | 51W | ||
| 6 | B – 5 | 9 | 55W | 138 | 58W | ||
| 7 | ? – 4 | 17 | 83W | 166 | 86W | ||
| 8 | A – 3 | 13 | 24W | 107 | 27W | ||
| 9 | C – 10 | 18 | 30W | 113 | 33W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.