Daily Sunspot Evaluation
Observation Sheet Friday, 6 March 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)
- 12
- Number of spots (f)
- 76
- Relative number (R)
- 196
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19810306.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DRO – 11 | 8 | 43W | 71 | 46W | 5.25 | 9460 |
| 2 | CSI – 5 | 4 | 09E | 19 | 06E | 5 | |
| 3 | HSX – 3 | 11 | 21E | 7 | 18E | 1.5 | |
| 4 | RXX – 1 | 7 | 28E | 0 | 25E | ||
| 5 | RRX – 1 | 28 | 41E | 347 | 38E | 0.5 | |
| 6 | BRI – 5 | 12 | 43E | 345 | 40E | 3.5 | |
| 7 | HAX – 1 | 24 | 50E | 338 | 47E | 2 | |
| 8 | ? – 7 | -18 | 75W | 103 | 78W | 11 | |
| 9 | HKI – 10 | -13 | 49W | 77 | 52W | 5.5 | |
| 10 | HKX – 4 | -11 | 26W | 54 | 29W | 5 | |
| 11 | CSO – 2 | -2 | 09W | 37 | 12W | 5 | |
| 12 | FKC – 26 | -4 | 29E | 359 | 26E | 15 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.