Daily Sunspot Evaluation
Observation Sheet Saturday, 23 May 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)
- 7
- Number of spots (f)
- 28
- Relative number (R)
- 98
- Observer
- OG
- Reading
- all checks consistent
- File
- 19810523.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 2 | 16 | 67W | 146 | 70W | 4 | |
| 2 | CAI – 9 | 18 | 30E | 49 | 27E | 7 | |
| 3 | HAI – 4 | 2 | 60E | 19 | 57E | 4 | |
| 4 | BXO – 4 | 13 | 68E | 11 | 65E | 5 | |
| 5 | HKI – 7 | -25 | 39W | 118 | 42W | 6 | |
| 6 | AXX – 1 | -15 | 41E | 38 | 38E | - | |
| 7 | AXX – 1 | -8 | 42E | 36 | 40E | 0.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.