Daily Sunspot Evaluation
Observation Sheet Saturday, 28 February 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)
- 13
- Number of spots (f)
- 72
- Relative number (R)
- 202
- Observer
- AB
- Reading
- all checks consistent
- File
- 19590228.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 18 | 39E | ||||
| 2 | B – 4 | 18 | 50E | ||||
| 3 | B – 3 | 12 | 52E | ||||
| 4 | J – 1 | 13 | 61E | ||||
| 5 | C – 4 | -2 | 51E | ||||
| 6 | C – 2 | -6 | 17E | ||||
| 7 | C – 10 | -10 | 20E | ||||
| 8 | A – 4 | -33 | 25W | ||||
| 9 | H – 2 | -33 | 36W | ||||
| 10 | H – 2 | 18 | 54W | ||||
| 11 | J – 1 | 22 | 55W | ||||
| 12 | B – 5 | 16 | 23W | ||||
| 13 | E – 33 | 23 | 26W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.