Daily Sunspot Evaluation
Observation Sheet Sunday, 17 April 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)
- 6
- Number of spots (f)
- 30
- Relative number (R)
- 90
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19830417.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 6 | 5 | 44E | 234 | 42 | 3 | 91 |
| 2 | CAI – 4 | 6 | 50E | 228 | 48 | 4.5 | 92 |
| 3 | DAC – 6 | -29 | 34W | 312 | 36W | 4 | 93 |
| 4 | AXX – 1 | -8 | 14W | 292 | 16W | 89 | |
| 5 | CAI – 9 | -7 | 08W | 286 | 10W | 7 | 94 |
| 6 | BRO – 4 | -11 | 06E | 272 | 04E | 3.5 | 95 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.