Daily Sunspot Evaluation
Observation Sheet Thursday, 21 January 1988
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)
- 5
- Number of spots (f)
- 26
- Relative number (R)
- 76
- Observer
- HG
- Reading
- all checks consistent
- File
- 19880121.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ARX – 1 | -37 | 42W | 33 | 44W | 0.5 | 10 |
| 2 | CRO – 4 | -40 | 33W | 24 | 35W | 6.0 | 11 |
| 3 | EKC – 9 | -20 | 17W | 8 | 19W | 14.0 | 13 |
| 4 | AXX – 1 | -24 | 01E | 350 | 01W | - | 15 |
| 5 | DAI – 11 | -30 | 06E | 345 | 04E | 9.5 | 14 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.