Daily Sunspot Evaluation
Observation Sheet Sunday, 28 December 1969
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)
- 12
- Number of spots (f)
- 63
- Relative number (R)
- 183
- Observer
- MÖ
- Reading
- all checks consistent
- File
- 19691228.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 13 | 50E | 265 | |||
| 2 | J – 4 | 11 | 73E | 242 | |||
| 3 | D – 19 | -21 | 29E | 286 | |||
| 4 | H – 1 | -16 | 06W | 321 | |||
| 5 | D – 8 | -22 | 35W | 350 | |||
| 6 | C – 5 | -12 | 33W | 348 | |||
| 7 | H – 6 | -14 | 54W | 9 | |||
| 8 | C – 9 | -3 | 32W | 347 | |||
| 9 | J – 1 | 10 | 56W | 11 | |||
| 10 | A – 5 | 8 | 07W | 320 | |||
| 11 | H – 3 | 22 | 03W | 318 | |||
| 12 | J – 1 | 10 | 02W | 317 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.