Daily Sunspot Evaluation
Observation Sheet Sunday, 17 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)
- 7
- Number of spots (f)
- 46
- Relative number (R)
- 116
- Observer
- TS
- Reading
- counts consistent, some coordinates doubtful
- File
- 19830717.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 1 | 13 | 63W | 816 ⚠ | 64W | 3 | 193 |
| 2 | DAO – 4 | 18 | 10W | 163 | 11W | 11 | 199 |
| 3 | CAI – 10 | 12 | 22E | 126 ⚠ | 26E | 4.5 | 187 |
| 4 | AXX – 2 | 14 | 44E | 109 | 43E | 2 | 201 |
| 5 | HAX – 2 | -17 | 64W | 212 ⚠ | 65W | 4 | 188 |
| 6 | DAI – 19 | -14 | 06W | 159 | 07W | 10.5 | 164 |
| 7 | BXI – 8 | -10 | 11E | 142 | 10E | 5 | 202 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.