Daily Sunspot Evaluation
Observation Sheet Friday, 28 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)
- 4
- Number of spots (f)
- 10
- Relative number (R)
- 50
- Observer
- HM
- Reading
- all checks consistent
- File
- 19780728.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 39 | 75E | 276 | 72E | ||
| 2 | ? – 1 | 20 | 79E | 272 | 76E | ||
| 3 | B – 3 | 19 | 60E | 291 | 57E | ||
| 4 | B – 5 | 27 | 20W | 11 | 23W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.