Daily Sunspot Evaluation
Observation Sheet Sunday, 31 December 1978
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)
- 163
- Relative number (R)
- 283
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19781231.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 18 | 48E | 44 | 46E | V5 | |
| 2 | D – 9 | 14 | 62E | 30 | 60E | V4 | |
| 3 | D – 10 | -10 | 50E | 42 | 48E | V4 | |
| 4 | J – 1 | -18 | 54E | 38 | 52E | V3 | |
| 5 | E – 24 | -34 | 54E | 38 | 52E | V2 | |
| 6 | E – 43 | -22 | 13E | 79 | 11E | V8 | |
| 7 | D – 17 | -32 | 17E | 75 | 15E | V9 | |
| 8 | E – 23 | -17 | 01W | 93 | 03W | V10 | |
| 9 | J – 4 | -30 | 05W | 97 | 09W | V11 | |
| 10 | A – 1 | -18 | 15W | 109 | 17W | ||
| 11 | E – 29 | 10 | 34W | 126 | 36W | V13 | |
| 12 | A – 1 | 15 | 11W | 103 | 13W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.