Daily Sunspot Evaluation
Observation Sheet Tuesday, 21 January 1958
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)
- 18
- Number of spots (f)
- 62
- Relative number (R)
- 242
- Observer
- AK
- Reading
- all checks consistent
- File
- 19580121.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 8 | 31 | 2E | ||||
| 2 | B – 7 | 24 | 4E | ||||
| 3 | E – 8 | 25 | 17E | ||||
| 4 | A – 1 | 20 | 21E | ||||
| 5 | H – 3 | 29 | 37E | ||||
| 6 | J – 1 | -8 | 69E | ||||
| 7 | A – 1 | -16 | 60E | ||||
| 8 | A – 2 | -19 | 66E | ||||
| 9 | B – 6 | -12 | 20E | ||||
| 10 | J – 1 | -20 | 27E | ||||
| 11 | C – 9 | -25 | 18W | ||||
| 12 | A – 1 | -23 | 79W | ||||
| 13 | J – 1 | -7 | 72W | ||||
| 14 | H – 5 | 11 | 55W | ||||
| 15 | A – 2 | 14 | 45W | ||||
| 16 | A – 1 | 30 | 80W | ||||
| 17 | H – 2 | 22 | 8W | ||||
| 18 | B – 3 | 37 | 5W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.