Table 5.
Similar to Table 4, but now for HR 5171A.
| Mode | Trend | Dates | JD− | Duration |
|---|---|---|---|---|
| of (B − V) | 24 00000 | (d) | ||
| V-c B-c | const | 1953–1958 | 34400–36400 | 2000 |
| V-c B-d | red | 1958–1962 | 36400–37800 | 1400 |
| V-d B-dd | red | 1962–1965 | 37800–38800 | 1000 |
| V-d B-dd | red | 1965–1969 | 38800–40400 | 1600 |
| V-d B-dd | red | 1969–1973 | 40400–42000 | 1600 |
| (V-dd B-d) | blue | 1973–1975 | 42000–42500 | 500 |
| V-uu B-u | red | 1975–1976 | 42500–43000 | 500 |
| V-u B-uu | blue | 1976–1977 | 43000–43200 | 200 |
| V-c B-d | red | 1977–1981 | 43200–44800 | 1600 |
| V-c B-c | const | 1981–1985 | 44800–46100 | 1300 |
| V-d B-d | const | 1985–1988 | 46100–47300 | 1200 |
| V-uu B-u | red | 1988–1991 | 47300–48400 | 1100 |
| V-dd B-d | blue | 1991–1995 | 48400–50000 | 1600 |
| V-dd B-d | blue | 2013–2018 | 56330–58140 | 1810 |
Notes. The transitions between blue and red modes between 1973 and 1977, just before and after the 1975 eruption, are amazingly short: 200d–500d compared to the other ones, and those of HR 8752, ρ Cas, and HD 179821 in Table 4; see Sect. 3.4.1 for a plausible cause. We note the gap between 1995 and 2013 which is caused by the lack of BV photometry. The BV data between 2013 and 2018 are listed in Table I.1. The 2013–2018 mode is not yet finished, and therefore the duration is a lower limit.
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