Daily Sunspot Evaluation
Observation Sheet Monday, 12 March 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)
- 7
- Number of spots (f)
- 41
- Relative number (R)
- 111
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19900312.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 2 | 29 | 60W | 184 | 62W | 7 | 102 |
| 2 | BRI – 11 | 11 | 18W | 142 | 20W | 5.5 | 104 |
| 3 | HH – 1 | 20 | 23E | 101 | 21E | 3 | 106 |
| 4 | BRO – 2 | 26 | 24E | 100 | 22E | 3 | 107 |
| 5 | CKI – 20 | 32 | 50G | 74 | 48E | 10 | 108 |
| 6 | DAO – 3 | -22 | 56W | 180 | 58W | 7 | 103 |
| 7 | AX – 2 | -18 | 24W | 148 | 26W | 4 | 111 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.