Daily Sunspot Evaluation
Observation Sheet Tuesday, 29 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)
- 14
- Number of spots (f)
- 101
- Relative number (R)
- 241
- Observer
- GT
- Reading
- all checks consistent
- File
- 19810929.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DKC – 33 | 8 | 17W | 190 | 20W | 11 | |
| 2 | DAI – 10 | 7 | 16E | 157 | 13E | 8 | |
| 3 | BXO – 10 | 16 | 31E | 142 | 28E | 55 | |
| 4 | HAX – 1 | 10 | 34E | 139 | 31E | 1 | |
| 5 | CAI – 10 | 15 | 41E | 132 | 38E | 5 | |
| 6 | HKX – 1 | -11 | 81W | 255 | 85W | 4 | |
| 7 | HSX – 1 | -9 | 56W | 229 | 59W | 2 | |
| 8 | HSX – 1 | -10 | 26W | 199 | 29W | 1 | |
| 9 | CAI – 13 | -7 | 18W | 191 | 21W | 6 | |
| 10 | HAX – 2 | -15 | 13W | 186 | 16W | 2 | |
| 11 | CAI – 9 | -15 | 02E | 171 | 01W | 8 | |
| 12 | AXX – 5 | -8 | 17E | 156 | 14E | 3 | |
| 13 | HAX – 1 | -17 | 48E | 125 | 45E | 2 | |
| 14 | CAO – 4 | -18 | 66E | 107 | 63E | 5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.