Daily Sunspot Evaluation
Observation Sheet Friday, 16 September 1983
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)
- 4
- Number of spots (f)
- 23
- Relative number (R)
- 63
- Observer
- HM
- Reading
- all checks consistent
- File
- 19830916.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 1 | -8 | 75W | 145 | 79W | - | 277 |
| 2 | AXX – 1 | -21 | 68W | 139 | 78W | - | 280 |
| 3 | AXX – 1 | -4 | 35W | 105 | 38W | - | 291 |
| 4 | DAC – 20 | -13 | 07E | 63 | 08E | 6 | 288 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.