Daily Sunspot Evaluation
Observation Sheet Monday, 23 July 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)
- 13
- Number of spots (f)
- 87
- Relative number (R)
- 217
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19900723.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AR – 1 | 11 | 47W | 214 | 50W | — | 325 |
| 2 | BXO – 5 | 21 | 12W | 179 | 15W | 2.5 | 320 |
| 3 | BXO – 2 | 10 | 12W | 179 | 15W | 3 | 313 |
| 4 | AX – 1 | 18 | 08W | 175 | 11W | — | 321 |
| 5 | BXO – 8 | 23 | 02W | 169 | 05W | 4 | 314 |
| 6 | FKO – 34 | 10 | 26E | 141 | 23E | 20 | 311 |
| 7 | BXI – 11 | 27 | 35E | 132 | 32E | 5 | 314 |
| 8 | ? – 3 | 10 | 76E | 91 | 73E | 8 | 322 |
| 9 | BXI – 3 | -16 | 39W | 206 | 42W | 3° | 315 |
| 10 | AX – 1 | -15 | 02W | 169 | 05W | — | 318 |
| 11 | EKO – 14 | -28 | 01E | 166 | 02W | 15.5 | 310 |
| 12 | HS – 2 | -22 | 46E | 121 | 43E | 2 | 36 |
| 13 | HK – 2 | -14 | 65E | 102 | 62E | 3 | 319 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.