Daily Sunspot Evaluation
Observation Sheet Saturday, 27 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)
- 11
- Number of spots (f)
- 45
- Relative number (R)
- 155
- Observer
- AT
- Reading
- counts consistent, some coordinates doubtful
- File
- 19691227.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 2 | 23 | 08E | 320 | |||
| 2 | B – 6 | 11 | 07E | 321 | |||
| 3 | A – 2 | 14 | 62E | 266 | |||
| 4 | B – 6 | -20 | 40E | 288 | |||
| 5 | H – 1 | -15 | 06E | 322 | |||
| 6 | D – 9 | -21 | 22W | 350 | |||
| 7 | A – 7 | -12 | 20W | 348 | |||
| 8 | H – 8 | -13 | 40W | 8 | |||
| 9 | A – 1 | -8 | 35W | 3 | |||
| 10 | J – 2 | -3 | 22W | 350 | |||
| 11 | J – 1 | 10 | 43W | 41 ⚠ |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.