Daily Sunspot Evaluation
Observation Sheet Friday, 15 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
- AÖ0
- Reading
- all checks consistent
- File
- 19830715.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 4 | 14 | 29W | 210 | 32W | 8.5 | 103 |
| 2 | CAI – 13 | 17 | 18E | 163 | 15E | 7 | 109 |
| 3 | BXO – 2 | 3 | 20E | 161 | 17E | 2.5 | 200 |
| 4 | HAX – 2 | 12 | 56E | 125 | 53E | 2.25 | 197 |
| 5 | ? – 2 | 14 | 73E | 108 | 70E | 201 | |
| 6 | ? – 2 | -10 | 83W | 264 | 86W | 187 | |
| 7 | HKX – 4 | -17 | 37W | 218 | 40W | 3.5 | 188 |
| 8 | AXX – 1 | -11 | 06W | 187 | 09W | 196 | |
| 9 | DAI – 24 | -15 | 25E | 156 | 22E | 8 | 194 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.