Daily Sunspot Evaluation
Observation Sheet Thursday, 12 May 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)
- 14
- Relative number (R)
- 64
- Observer
- HG
- Reading
- counts consistent, some coordinates doubtful
- File
- 19880512.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 2 | 25 | 65W | -19 ⚠ | 67W | 89 | |
| 2 | AR – 1 | 21 | 52W | 6 | 54W | 93 | |
| 3 | BRI – 3 | 14 | 46W | 60 ⚠ | 48W | 3.5 | 100 |
| 4 | AR – 2 | 18 | 18W | 332 | 20W | 0.75 | 91 |
| 5 | CRI – 6 | -15 | 12W | 326 | 14W | 2 | 95 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.