Daily Sunspot Evaluation
Observation Sheet Thursday, 26 March 1981
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)
- 9
- Number of spots (f)
- 65
- Relative number (R)
- 155
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19810326.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 6 | 20 | 48W | 173 | 51W | 7 | |
| 2 | ABX – 2 | 16 | 42W | 167 | 45W | 225 | |
| 3 | HAX – 6 | 10 | 38W | 163 | 41W | 2 | |
| 4 | FAC – 32 | 13 | 19W | 144 | 22W | 145 | |
| 5 | ABX – 1 | 19 | 05W | 130 | 08W | 1 | |
| 6 | DAO – 7 | 21 | 32E | 92 | 30E | 835 | |
| 7 | BXO – 2 | -19 | 17W | 142 | 20W | 2 | |
| 8 | HAX – 7 | -44 | 21E | 104 | 18E | 4E | |
| 9 | DAO – 2 | -12 | 61E | 64 | 58E | 825 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.