Daily Sunspot Evaluation
Observation Sheet Thursday, 12 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)
- 5
- Number of spots (f)
- 78
- Relative number (R)
- 128
- Observer
- HM
- Reading
- all checks consistent
- File
- 19830512.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 3 | 8 | 71E | 238 | 68E | 4 | 124 |
| 2 | FKC – 31 | -11 | 38W | 347 | 41W | 20 | 120 |
| 3 | DAC – 27 | -10 | 09E | 300 | 06E | 10 | 121 |
| 4 | CKO – 12 | -30 | 09E | 300 | 06E | 7 | 122 |
| 5 | HAX – 5 | -34 | 13E | 296 | 10E | 2 | 123 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.