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Table 1.
Automatically detected base brightenings categorized according to directions.
| Directional | Random-like walk | Undefined* | |
|---|---|---|---|
| Number of base brightenings | 38 | 222 | 191 |
| Mean PoS velocity | 9.6 km s−1 | 6.2 km s−1 | 6.1 km s−1 |
| Most frequent Pos velocity | 7, 13 km s−1** | 3 km s−1 | 3 km s−1 |
Notes. *Base brightenings appearing in only two frames have undefined directions
**Distribution of this group shows two peaks.
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