Daily Sunspot Evaluation
Observation Sheet Friday, 20 May 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)
- 57
- Relative number (R)
- 127
- Observer
- OG
- Reading
- all checks consistent
- File
- 19830520.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 1 | 8 | 40W | 242 | 42W | 1 | 124 |
| 2 | BRI – 6 | 10 | 30W | 232 | 32W | 3 | 125 |
| 3 | DKC – 30 | 17 | 46E | 156 | 44E | 10 | 131 |
| 4 | HAX – 1 | -10 | 77W | 279 | 79W | 3 | 126 |
| 5 | HAX – 1 | -20 | 65W | 267 | 67W | 1 | 133 |
| 6 | HAX – 1 | -27 | 08E | 194 | 06E | 2.5 | 120 |
| 7 | DAI – 17 | -25 | 23E | 179 | 21E | 9 | 130 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.