Daily Sunspot Evaluation
Observation Sheet Thursday, 17 March 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)
- 29
- Relative number (R)
- 79
- Observer
- HG
- Reading
- all checks consistent
- File
- 19880317.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HKX – 6 | 22 | 10E | 322 | 09E | 3.25 | 47 |
| 2 | DAI – 7 | -31 | 19W | 351 | 20W | 6.5 | 52 |
| 3 | AXX – 1 | -16 | 02E | 330 | 01E | 50 | |
| 4 | AXX – 1 | -28 | 08E | 324 | 07E | 53 | |
| 5 | FKC – 14 | -25 | 17E | 315 | 16E | 17 | 48 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.