Daily Sunspot Evaluation
Observation Sheet Friday, 17 March 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)
- 13
- Number of spots (f)
- 179
- Relative number (R)
- 309
- Observer
- HÇ
- Reading
- all checks consistent
- File
- 19890317.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | FKC – 48 | 34 | 58W | 254 | 60W | 23.0 | 134 |
| 2 | AX – 6 | 14 | 17W | 213 | 19W | 1.0 | 133 |
| 3 | BRI – 27 | 17 | 10W | 206 | 12W | 7.5 | 132 |
| 4 | AX – 1 | 28 | 19E | 177 | 17E | - | 131 |
| 5 | HA – 13 | 32 | 22E | 174 | 20E | 2.0 | 130 |
| 6 | CKO – 17 | 17 | 57E | 139 | 55E | 10.0 | 129 |
| 7 | CAO – 2 | 12 | 72E | 124 | 70E | 7.0 | 128 |
| 8 | CAO – 17 | -17 | 44W | 240 | 46W | 12.5 | 127 |
| 9 | AX – 2 | -17 | 25W | 221 | 27W | 0.5 | 126 |
| 10 | BXI – 3 | -47 | 10E | 186 | 08E | 3.0 | 125 |
| 11 | IK – 36 | -15 | 20E | 176 | 18E | 8.0 | 124 |
| 12 | BXI – 3 | -16 | 50E | 146 | 48E | 4.0 | 123 |
| 13 | BXI – 4 | -12 | 74E | 122 | 72E | 5.0 | 122 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.