Daily Sunspot Evaluation
Observation Sheet Saturday, 23 June 1990
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)
- 6
- Number of spots (f)
- 18
- Relative number (R)
- 78
- Observer
- HE
- Reading
- all checks consistent
- File
- 19900623.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 27 | 55E | 147 | 53E | 2 | 262 |
| 2 | ? – 1 | -32 | 70W | 272 | 72W | - | 259 |
| 3 | HA – 1 | -9 | 58W | 260 | 60W | 1.5 | 253 |
| 4 | BRI – 13 | -9 | 23E | 179 | 21E | 7 | 264 |
| 5 | AR – 1 | -18 | 61E | 141 | 59E | 1 | 265 |
| 6 | ? – 1 | -22 | 73E | 129 | 71E | 3 | 266 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.