Daily Sunspot Evaluation
Observation Sheet Saturday, 4 May 1991
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)
- 7
- Number of spots (f)
- 45
- Relative number (R)
- 115
- Observer
- HE
- Reading
- all checks consistent
- File
- 19910504.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CSI – 12 | 7 | 29W | 35 | 31W | 7.5 | 196 |
| 2 | ? – 1 | -26 | 81W | 87 | 83W | 2 | 200 |
| 3 | CAO – 7 | -24 | 56W | 62 | 58W | 9 | 206 |
| 4 | HS – 1 | -22 | 18W | 24 | 20W | 2 | 199 |
| 5 | AR – 1 | -5 | 09W | 15 | 11W | 0.5 | 202 |
| 6 | DAI – 22 | -10 | 16E | 350 | 14E | 5.5 | 204 |
| 7 | HA – 1 | -12 | 24E | 342 | 22E | 1 | 203 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.