Daily Sunspot Evaluation
Observation Sheet Sunday, 4 January 1981
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)
- 9
- Number of spots (f)
- 37
- Relative number (R)
- 127
- Observer
- OG
- Reading
- all checks consistent
- File
- 19810104.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 13 | 83W | 194 | 85W | ||
| 2 | AXX – 3 | 9 | 73W | 184 | 75W | ||
| 3 | DAI – 9 | 23 | 49W | 160 | 51W | ||
| 4 | DAC – 10 | 8 | 31W | 142 | 33W | ||
| 5 | DAO – 4 | 12 | 06W | 117 | 08W | ||
| 6 | HAX – 1 | -6 | 74W | 185 | 76W | ||
| 7 | HSX – 1 | -30 | 67W | 178 | 69W | ||
| 8 | BXO – 3 | -14 | 41E | 70 | 39E | ||
| 9 | BXI – 5 | -16 | 67E | 44 | 65E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.