Daily Sunspot Evaluation
Observation Sheet Tuesday, 16 September 1980
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)
- 8
- Number of spots (f)
- 37
- Relative number (R)
- 117
- Observer
- ED
- Reading
- all checks consistent
- File
- 19800916.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 1 | 13 | 35W | 157 | 38W | ||
| 2 | BXX – 3 | -9 | 29W | 151 | 32W | 2.5 | |
| 3 | HXS – 17 | 15 | 27W | 149 | 30W | 7 | |
| 4 | CAO – 5 | -10 | 03E | 119 | 00 | 2.5 | |
| 5 | AXX – 2 | 15 | 06E | 116 | 03E | 0.5 | |
| 6 | DAO – 5 | -11 | 12E | 110 | 09E | 5 | |
| 7 | AXX – 2 | 21 | 17E | 105 | 14E | 0.5 | |
| 8 | HXX – 2 | -30 | 65E | 57 | 61E | 1.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.