Daily Sunspot Evaluation
Observation Sheet Tuesday, 18 October 1988
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)
- 8
- Number of spots (f)
- 60
- Relative number (R)
- 140
- Observer
- HÇ
- Reading
- all checks consistent
- File
- 19881018.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 20 | 23 | 25W | 37 | 28W | 7.5 | 277 |
| 2 | CAI – 7 | 21 | 11W | 23 | 14W | 3.25 | 272 |
| 3 | OXO – 3 | 32 | 10W | 22 | 13W | 5 | 260 |
| 4 | HA – 2 | 29 | 63E | 309 | 60E | 2 | 251 |
| 5 | FKC – 9 | 21 | 80E | 292 | 77E | 16 | 262 |
| 6 | DAO – 17 | -22 | 55W | 67 | 58W | 9.5 | 295 |
| 7 | HA – 1 | -13 | 52W | 64 | 55W | 1.5 | 276 |
| 8 | HA – 1 | -37 | 47E | 325 | 44E | 2.25 | 283 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.