Daily Sunspot Evaluation
Observation Sheet Monday, 20 February 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)
- 12
- Number of spots (f)
- 142
- Relative number (R)
- 262
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19890220.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 18 | 80W | 245 | 83W | - | 77 |
| 2 | AX – 1 | 26 | 75W | 240 | 78W | - | 58 |
| 3 | HA – 3 | 27 | 49W | 214 | 52W | 2.0 | 59 |
| 4 | BRO – 12 | 20 | 30W | 195 | 33W | 14.0 | 78 |
| 5 | BXO – 2 | 39 | 28W | 193 | 31W | 3.5 | |
| 6 | AR – 4 | 31 | 19W | 184 | 22W | 2.0 | |
| 7 | DKC – 34 | 17 | 30E | 135 | 27E | 14.0 | |
| 8 | CAI – 10 | -17 | 70W | 235 | 73W | 5.0 | |
| 9 | FKC – 45 | -12 | 00 | 165 | 03W | 17.0 | |
| 10 | CSI – 22 | -21 | 21E | 144 | 18E | 12.5 | |
| 11 | CAI – 7 | -10 | 66E | 99 | 63E | 6.0 | |
| 12 | ? – 1 | -26 | 80E | 85 | 77E | - |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.