Daily Sunspot Evaluation
Observation Sheet Tuesday, 15 February 1977
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)
- 4
- Number of spots (f)
- 19
- Relative number (R)
- 59
- Observer
- GA
- Reading
- all checks consistent
- File
- 19770215.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | -20 | 65E | 56 | 63E | ||
| 2 | D – 8 | -41 | 39W | 160 | 41W | ||
| 3 | G – 4 | 3 | 19W | 140 | 21W | ||
| 4 | C – 5 | 24 | 19W | 140 | 21W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.