Daily Sunspot Evaluation
Observation Sheet Monday, 27 April 1981
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)
- 6
- Number of spots (f)
- 115
- Relative number (R)
- 175
- Observer
- OG
- Reading
- all checks consistent
- File
- 19810427.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKC – 56 | 14 | 24W | 359 | 27W | 11 | |
| 2 | DAI – 11 | 19 | 33E | 302 | 30E | 7.5 | |
| 3 | HRX – 2 | 18 | 68E | 267 | 65E | 3 | |
| 4 | AXX – 3 | -9 | 04W | 339 | 07W | 1 | |
| 5 | CKO – 6 | -8 | 02E | 333 | 01W | 5 | |
| 6 | EKC – 37 | -17 | 57E | 278 | 54E | 18 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.