Daily Sunspot Evaluation
Observation Sheet Friday, 16 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)
- 5
- Number of spots (f)
- 43
- Relative number (R)
- 93
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19810116.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 17 | 4 | 35W | 347 | 37W | 5 | 9436 |
| 2 | DAI – 13 | 5 | 34E | 278 | 32E | 5 | |
| 3 | HAX – 1 | 19 | 73E | 239 | 71E | 2 | |
| 4 | BAI – 4 | -18 | 27W | 339 | 29W | 3 | |
| 5 | DAI – 8 | -21 | 63E | 249 | 61E | 4.75 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.