Daily Sunspot Evaluation
Observation Sheet Wednesday, 28 June 1989
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)
- 8
- Number of spots (f)
- 157
- Relative number (R)
- 237
- Observer
- MB
- Reading
- all checks consistent
- File
- 19890628.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EHO – 25 | 26 | 24W | 299 | 27W | 12.5 | 303 |
| 2 | DAC – 15 | 8 | 05W | 280 | 08W | 5.5 | 110 |
| 3 | CSI – 8 | 21 | 01W | 276 | 04W | 7.5 | 744 |
| 4 | EKC – 48 | 18 | 11E | 264 | 08E | 12 | 720 |
| 5 | HS – 1 | -17 | 63W | 338 | 66W | 2 | 305 |
| 6 | FSC – 6 | -19 | 31W | 306 | 34W | 21.5 | 348 |
| 7 | CSO – 20 | -19 | 12W | 287 | 15W | 12 | 771 |
| 8 | DKC – 34 | -17 | 05E | 270 | 02E | 9 | 777 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.