Daily Sunspot Evaluation
Observation Sheet Wednesday, 20 July 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)
- 9
- Number of spots (f)
- 54
- Relative number (R)
- 144
- Observer
- TS
- Reading
- all checks consistent
- File
- 19830720.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 1 | 17 | 56W | 171 | 58W | 210 | |
| 2 | AXX – 1 | 21 | 44W | 159 | 46W | 199 | |
| 3 | HAX – 4 | 14 | 12W | 127 | 14W | 3 | 197 |
| 4 | AXX – 1 | 17 | 07E | 108 | 05E | 201 | |
| 5 | BXI – 9 | 8 | 23E | 92 | 21E | 3 | 211 |
| 6 | BXO – 7 | 11 | 34E | 81 | 32E | 6 | 207 |
| 7 | AXX – 2 | -5 | 31W | 146 | 33W | 1 | 202 |
| 8 | BXI – 27 | -9 | 29W | 144 | 31W | 9 | 206 |
| 9 | AXX – 2 | -6 | 24E | 91 | 22E | 1 | 212 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.