Daily Sunspot Evaluation
Observation Sheet Monday, 28 April 1958
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)
- 13
- Number of spots (f)
- 86
- Relative number (R)
- 216
- Observer
- FY
- Reading
- all checks consistent
- File
- 19580428.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 2 | 11 | 15E | ||||
| 2 | J – 1 | 28 | 39E | ||||
| 3 | E – 23 | 18 | 49E | ||||
| 4 | A – 1 | 19 | 61E | ||||
| 5 | E – 26 | -15 | 68E | ||||
| 6 | J – 1 | -16 | 47E | ||||
| 7 | C – 5 | -24 | 42E | ||||
| 8 | H – 1 | -16 | 16E | ||||
| 9 | A – 1 | -16 | 37W | ||||
| 10 | J – 1 | 13 | 66W | ||||
| 11 | B – 3 | 8 | 38W | ||||
| 12 | E – 19 | 12 | 26W | ||||
| 13 | J – 2 | 17 | 12W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.