Daily Sunspot Evaluation
Observation Sheet Friday, 1 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)
- 16
- Number of spots (f)
- 85
- Relative number (R)
- 245
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19891201.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DKC – 8 | 26 | 62W | 76 | 64W | 6.5 | |
| 2 | BRI – 3 | 43 | 54W | 68 | 56W | 4 | |
| 3 | DKC – 15 | 19 | 20W | 34 | 22W | 6.5 | |
| 4 | AX – 1 | 20 | 11W | 25 | 13W | - | |
| 5 | DAI – 9 | 15 | 11W | 25 | 13W | 5.5 | |
| 6 | DAI – 20 | 10 | 16E | 358 | 14E | 6.5 | |
| 7 | BXO – 4 | 12 | 44E | 330 | 42E | 5 | |
| 8 | AR – 1 | 12 | 57E | 317 | 55E | 0.5 | |
| 9 | HK – 2 | 18 | 67E | 307 | 65E | 5 | |
| 10 | ? – 4 | -5 | 78W | 92 | 80W | 11 | |
| 11 | HA – 1 | -11 | 54W | 68 | 56W | 1 | |
| 12 | HA – 1 | -15 | 51W | 65 | 53W | 1.5 | |
| 13 | DAO – 9 | -18 | 12E | 2 | 10E | 9.5 | |
| 14 | CAO – 4 | -16 | 36E | 338 | 34E | 5.5 | |
| 15 | BXO – 2 | -27 | 45E | 329 | 43E | 3 | |
| 16 | AR – 1 | -16 | 61E | 313 | 59E | 0.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.