Daily Sunspot Evaluation
Observation Sheet Sunday, 6 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)
- 16
- Number of spots (f)
- 82
- Relative number (R)
- 242
- Observer
- OG
- Reading
- counts consistent, some coordinates doubtful
- File
- 19810906.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 1 | 15 | 51W | 166 | 53W | 1 | |
| 2 | HAX – 2 | 7 | 21W | 136 | 23W | 2 | |
| 3 | HAX – 1 | 12 | 12W | 127 | 14W | 3 | |
| 4 | BXO – 4 | 12 | 02W | 117 | 04W | 4 | |
| 5 | AXX – 1 | 17 | 22E | 83 ⚠ | 20E | - | |
| 6 | CAO – 9 | 28 | 24E | 81 ⚠ | 22E | 7 | |
| 7 | AXX – 3 | 19 | 42E | 73 | 40E | 3 | |
| 8 | EKC – 15 | 9 | 58E | 57 | 56E | 16 | |
| 9 | HAX – 2 | 14 | 61E | 54 | 59E | 2 | |
| 10 | EAO – 15 | -12 | 65W | 180 | 67W | 15 | |
| 11 | OKI – 14 | -11 | 16W | 131 | 18W | 7 | |
| 12 | HAX – 1 | -6 | 15W | 130 | 17W | 4 | |
| 13 | HKI – 8 | -16 | 07W | 122 | 08W | 5 | |
| 14 | AXX – 1 | -19 | 04E | 111 | 02E | - | |
| 15 | BXO – 3 | -1 | 58E | 57 | 56E | 6 | |
| 16 | ? – 2 | -8 | 73E | 42 | 71E | 8 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.