Daily Sunspot Evaluation
Observation Sheet Tuesday, 20 February 1979
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)
- 11
- Number of spots (f)
- 62
- Relative number (R)
- 172
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19790220.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 3 | 24 | 27E | 110 | 26E | 117 | |
| 2 | ? – 1 | 37 | 69E | 68 | 68E | 116 | |
| 3 | J – 1 | -25 | 66E | 71 | 65E | 114 | |
| 4 | J – 1 | -24 | 53E | 84 | 52E | 112 | |
| 5 | J – 2 | -27 | 07E | 130 | 66E | 108 | |
| 6 | A – 2 | -16 | 38W | 175 | 39 | 110 | |
| 7 | A – 1 | 2 | 32W | 169 | 33W | 105 | |
| 8 | H – 8 | 7 | 42W | 179 | 43W | 113 | |
| 9 | ? – 1 | 20 | 72W | 209 | 73W | 107 | |
| 10 | H – 11 | 18 | 38W | 175 | 39W | 106 | |
| 11 | E – 31 | 16 | 10W | 147 | 11W | 109 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.