Daily Sunspot Evaluation
Observation Sheet Monday, 12 September 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)
- 29
- Relative number (R)
- 109
- Observer
- HE
- Reading
- all checks consistent
- File
- 19880912.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 1 | 29 | 82W | 209 | 85W | 217 | |
| 2 | AX – 1 | 16 | 12W | 139 | 15W | 218 | |
| 3 | HA – 9 | 33 | 22E | 105 | 19E | 3.5 | 213 |
| 4 | RBO – 2 | 14 | 32E | 95 | 29E | 2.25 | 219 |
| 5 | BXO – 2 | -26 | 52W | 179 | 55W | 6 | 222 |
| 6 | HS – 2 | -21 | 16W | 143 | 19W | 1.5 | 210 |
| 7 | BXO – 4 | -20 | 1W | 128 | 4W | 2.5 | 220 |
| 8 | DAI – 8 | -10 | 68E | 59 | 69E | 6.5 | 223 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.