Daily Sunspot Evaluation
Observation Sheet Monday, 28 September 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)
- 111
- Relative number (R)
- 261
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19810928.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 3 | 11 | 76W | 258 | 77W | 2 | |
| 2 | DKC – 28 | 9 | 07W | 190 | 08W | 105 | |
| 3 | DAI – 20 | 7 | 27E | 156 | 26E | 105 | |
| 4 | BXO – 6 | 17 | 42E | 141 | 41E | 5 | |
| 5 | HAX – 1 | 10 | 44E | 139 | 43E | 15 | |
| 6 | AXX – 3 | 14 | 53E | 130 | 52E | 25 | |
| 7 | HHX – 1 | -9 | 70W | 253 | 71W | 3 | |
| 8 | DAI – 17 | -8 | 49W | 232 | 50W | 95 | |
| 9 | HAX – 1 | -9 | 16W | 199 | 17W | 15 | |
| 10 | CAO – 6 | -7 | 08W | 191 | 09W | 45 | |
| 11 | HSX – 1 | -14 | 03W | 186 | 04W | 15 | |
| 12 | CAI – 15 | -14 | 13E | 170 | 12E | 95 | |
| 13 | RXO – 4 | -6 | 27E | 156 | 26E | 4 | |
| 14 | HKX – 1 | -17 | 58E | 125 | 57E | - | |
| 15 | ? – 4 | -18 | 75E | 108 | 74E | - |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.