Daily Sunspot Evaluation
Observation Sheet Tuesday, 28 July 1959
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)
- 105
- Relative number (R)
- 205
- Observer
- ET
- Reading
- all checks consistent
- File
- 19590728.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 10 | 25 | 16E | ||||
| 2 | J – 1 | 28 | 28E | ||||
| 3 | H – 13 | 36 | 40E | ||||
| 4 | F – 63 | 11 | 43E | ||||
| 5 | A – 3 | 13 | 61E | ||||
| 6 | G – 2 | 7 | 75E | ||||
| 7 | J – 2 | -18 | 4E | ||||
| 8 | B – 4 | -21 | 48W | ||||
| 9 | G – 6 | -6 | 50W | ||||
| 10 | J – 1 | 18 | 44W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.