Daily Sunspot Evaluation
Observation Sheet Monday, 19 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)
- 7
- Number of spots (f)
- 35
- Relative number (R)
- 105
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19810119.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 3 | 4 | 74W | 347 | 76W | 3 | |
| 2 | DAC – 13 | 5 | 06W | 279 | 08W | 8 | |
| 3 | HAX – 1 | 18 | 35E | 238 | 32E | 4.5 | |
| 4 | BXO – 5 | 16 | 37E | 236 | 35E | 4.25 | |
| 5 | ? – 1 | 9 | 80E | 193 | 78E | ||
| 6 | BXO – 2 | -17 | 65W | 338 | 67W | 6.5 | |
| 7 | DAC – 10 | -21 | 25E | 248 | 23E | 6.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.