Daily Sunspot Evaluation
Observation Sheet Thursday, 16 October 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)
- 12
- Number of spots (f)
- 154
- Relative number (R)
- 274
- Observer
- OG
- Reading
- all checks consistent
- File
- 19801016.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 12 | 12 | 78W | 164 | 81W | 15 | |
| 2 | CAO – 8 | 14 | 55W | 141 | 58W | 12 | |
| 3 | BXO – 9 | 16 | 09W | 95 | 12W | 6 | |
| 4 | BXO – 7 | 6 | 08W | 94 | 11W | 4 | |
| 5 | CAI – 11 | 8 | 26E | 60 | 23E | 6.5 | |
| 6 | ? – 1 | -26 | 75W | 161 | 78W | ||
| 7 | HAX – 1 | -31 | 59W | 145 | 62W | 2 | |
| 8 | EKI – 80 | -10 | 35W | 121 | 38W | 11.5 | |
| 9 | AKK – 3 | -7 | 24W | 110 | 27W | 2 | |
| 10 | ARX – 2 | -20 | 17W | 103 | 20W | 0.5 | |
| 11 | DAI – 17 | -28 | 11E | 75 | 08E | 7E | |
| 12 | HKX – 3 | -33 | 42E | 44 | 38E | 3.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.