Daily Sunspot Evaluation
Observation Sheet Wednesday, 17 January 1990
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)
- 14
- Number of spots (f)
- 100
- Relative number (R)
- 240
- Observer
- HÇ
- Reading
- all checks consistent
- File
- 19900117.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXO – 7 | 11 | 25W | 140 | 28W | 6.5 | 10 |
| 2 | AX – 1 | 41 | 01E | 114 | 02W | - | 25 |
| 3 | EAC – 22 | 33 | 04E | 111 | 01E | 13.5 | 20 |
| 4 | CAI – 44 | 22 | 12E | 103 | 09E | 11 | 21 |
| 5 | HA – 2 | 25 | 47E | 68 | 44E | 1 | 26 |
| 6 | HS – 1 | -24 | 75W | 190 | 78W | 2 | 10 |
| 7 | AX – 2 | -37 | 12W | 127 | 15W | 1 | 16 |
| 8 | HA – 1 | -30 | 06E | 109 | 03E | 1.5 | 19 |
| 9 | HA – 5 | -20 | 12E | 103 | 09E | 2 | 22 |
| 10 | AX – 1 | -29 | 19E | 96 | 16E | - | 28 |
| 11 | AX – 1 | -34 | 25E | 90 | 22E | - | 29 |
| 12 | HA – 4 | -9 | 62E | 53 | 59E | 4 | 27 |
| 13 | BXI – 8 | -12 | 74E | 41 | 71E | 8 | 30 |
| 14 | ? – 1 | -27 | 87E | 28 | 84E | - | 31 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.