V1472 Aquilae
| Observation data Epoch J2000 Equinox J2000 | ||
|---|---|---|
| Constellation | Aquila | |
| Right ascension | 20h 05m 26.54594s[2] | |
| Declination | +15° 30′ 01.5408″[2] | |
| Apparent magnitude (V) | 6.34[3] (6.36 to 6.60)[4] | |
| Characteristics | ||
| Spectral type | M2.5III[1] | |
| U−B color index | +1.76[3] | |
| B−V color index | +1.64[3] | |
| Variable type | Candidate eclipsing variable[4]
| |
| Absolute magnitude (MV) | −2.6±1.0[6] | |
Semi-amplitude (K1)(primary) | 12.97±0.27 km/s | |
| Details | ||
Rotational velocity (v sin i) | 10[8] km/s | |
| Database references | ||
| SIMBAD | data | |
V1472 Aquilae is a
high-velocity star system with a radial velocity of −112 km/s.[5]
The binary nature of the main component was announced by
projected rotational velocity of 10 km/s, possibly due to interaction with its companion.[8]
The variability of this star was discovered from Hipparcos data and, in 1997, it was classified as a
ellipsoidal variable. The 198-day orbital period produces a light curve with a primary and secondary minimum which, together with possible variations due to ellipsoidal rotation, produces the observed semiregular 100-day photometric variation.[1] Later observations show that it is less luminous than expected for a pulsating star with its amplitude, being more typical of ellipsoidal variables, and that it has a 200.05-day period with primary and secondary minima.[10]
A co-moving companion some 4.0 magnitudes fainter than the primary lies at an
arcseconds.[1]
References
- ^ Bibcode:1997IBVS.4501....1S.
- ^ .
- ^ Bibcode:1995yCat.5050....0H.
- ^ S2CID 125853869.
- ^ .
- ^ S2CID 118573930. A1.
- ^ Bibcode:1982A&A...105..318L.
- ^ S2CID 15149456.
- ^ "HD 190658". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-03-02.
- S2CID 118411237.
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