Daily Sunspot Evaluation
Observation Sheet Tuesday, 15 January 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)
- 10
- Number of spots (f)
- 69
- Relative number (R)
- 169
- Observer
- OG
- Reading
- all checks consistent
- File
- 19800115.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 2 | 20 | 78W | 195 | 81W | 5 | |
| 2 | HAX – 2 | 13 | 65W | 182 | 68W | 3 | |
| 3 | EAO – 14 | 26 | 54W | 171 | 57W | 16 | |
| 4 | HSX – 1 | 22 | 17W | 134 | 20W | 0.5 | |
| 5 | EAE – 10 | 9 | 04W | 121 | 07W | 9.5 | |
| 6 | HAX – 1 | 29 | 15E | 101 | 12E | 2.5 | |
| 7 | AXX – 3 | 32 | 25E | 92 | 22E | 1 | |
| 8 | EAO – 9 | -13 | 60W | 177 | 63W | 14 | |
| 9 | DAI – 12 | -17 | 02E | 115 | 01W | 7 | |
| 10 | EAC – 15 | -15 | 55E | 62 | 52E | 13 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.