Daily Sunspot Evaluation
Observation Sheet Monday, 18 December 1989
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)
- 48
- Relative number (R)
- 118
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19891218.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 8 | 33 | 45W | 196 | 48W | 9 | 439 |
| 2 | AR – 1 | 27 | 05E | 146 | 02E | - | 439 |
| 3 | CHI – 9 | 12 | 11E | 140 | 08E | 12.5 | 439 |
| 4 | BRI – 4 | 19 | 31E | 120 | 28E | 8 | 439 |
| 5 | CAI – 9 | 19 | 52E | 99 | 49E | 5 | 439 |
| 6 | DAI – 14 | -10 | 42W | 193 | 45W | 7 | 439 |
| 7 | HK – 3 | -6 | 48E | 103 | 45E | 5 | 439 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.