Daily Sunspot Evaluation
Observation Sheet Saturday, 2 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)
- 15
- Number of spots (f)
- 63
- Relative number (R)
- 213
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19810502.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 2 | 16 | 36W | 31 | 38W | 1.5 | |
| 2 | RXX – 2 | 25 | 30W | 25 | 32W | 1.5 | |
| 3 | CSO – 2 | 2 | 29W | 24 | 31W | 9 | |
| 4 | BRO – 4 | 12 | 06W | 1 | 08W | 4.5 | |
| 5 | HSX – 1 | 20 | 15E | 340 | 13E | 2 | |
| 6 | DAC – 21 | 7 | 39E | 316 | 37E | 10 | |
| 7 | DAO – 10 | 15 | 42E | 313 | 40E | 7.5 | |
| 8 | HAX – 2 | 5 | 50E | 305 | 48E | 2 | |
| 9 | RXX – 1 | 9 | 55E | 300 | 53E | - | |
| 10 | RXX – 1 | 10 | 65E | 290 | 63E | - | |
| 11 | RXX – 1 | 16 | 65E | 290 | 63E | - | |
| 12 | BRO – 4 | -10 | 40W | 35 | 42W | 5 | |
| 13 | DAO – 9 | -8 | 22E | 333 | 20E | 7 | |
| 14 | RXX – 1 | -11 | 66E | 289 | 64E | - | |
| 15 | RXX – 2 | -5 | 30E | 325 | 28E | 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.