HD 193322
HD 193322 (HR 7767) is a group of six stars which appear to be at least loosely bound into a system in the constellation Cygnus. The stars comprise the core of the young open cluster Collinder 419 (Cr 419), which contains a total of 51 known stars. Another prominent member of the cluster is the eclipsing binary star V470 Cygni (HD 228911). The cluster lies at a distance of about 3500 light years and its stars are only a few million years old.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cygnus |
| HD 193322A | |
| Right ascension | 20h 18m 06.9877s |
| Declination | +40° 43′ 55.4947″ |
| Apparent magnitude (V) | +5.958 |
| HD 193322B | |
| Right ascension | 20h 18m 06.7684s |
| Declination | +40° 43′ 54.3586″ |
| Apparent magnitude (V) | +8.23 |
| Characteristics | |
| HD 193322Aa | |
| Evolutionary stage | main-sequence star |
| Spectral type | O9Vnn |
| HD 193322Ab1 | |
| Evolutionary stage | giant star |
| Spectral type | O8.5 III |
| HD 193322Ab2 | |
| Evolutionary stage | main-sequence star |
| Spectral type | B2.5 V? |
| HD 193322B | |
| Evolutionary stage | main-sequence star |
| Spectral type | B1.5 V |
| HD 193322C | |
| Evolutionary stage | main-sequence star |
| Spectral type | B8 V |
| HD 193322D | |
| Evolutionary stage | main-sequence star |
| Spectral type | B9 V |
| Astrometry | |
| HD 193322A | |
| Proper motion (μ) | RA: -2.488 mas/yr Dec.: -6.837 mas/yr |
| Parallax (π) | 1.0669 ± 0.1403 mas |
| Distance | approx. 3,100 ly (approx. 900 pc) |
| HD 193322B | |
| Proper motion (μ) | RA: -3.070 mas/yr Dec.: -6.015 mas/yr |
| Parallax (π) | 0.9268 ± 0.0432 mas |
| Distance | 3,500 ± 200 ly (1,080 ± 50 pc) |
| Orbit | |
| Primary | HD 193322Aa |
| Companion | HD 193322Ab |
| Period (P) | 44±1 yr |
| Semi-major axis (a) | 0.0525+0.0025 −0.0020″ |
| Eccentricity (e) | 0.58+0.03 −0.04 |
| Inclination (i) | 37+6 −4° |
| Details | |
| HD 193322A | |
| Mass | Aa: 21 M☉ Ab1: 23 M☉ Ab2: 9 M☉ |
| Surface gravity (log g) | Aa: 4.0 cgs Ab1: 3.5 cgs Ab2: 4.0 cgs |
| Temperature | Aa: 33,000 K Ab1: 32,500 K Ab2: 20,000 K |
| Rotational velocity (v sin i) | Aa: 350 km/s Ab1: 40 km/s Ab2: 200 km/s |
| Age | 7 Myr |
| HD 193322B | |
| Surface gravity (log g) | 4.0 cgs |
| Temperature | 23,000 K |
| Rotational velocity (v sin i) | 100 km/s |
| Other designations | |
| HD 193322A: TYC 3155-2321-1, Gaia EDR3 2062360626011542272 304.5291012654289 | |
| HD 193322B: TYC 3155-2321-2, Gaia EDR3 2062360626009209856 | |
| HD 193322C: UCAC2 46029301, 2MASS J20180562+4043248, Gaia EDR3 2062359152847218432 | |
| HD 193322D: UCAC2 46029306, 2MASS J20180691+4043055, Gaia EDR3 2062359084127740032 | |
| Database references | |
| SIMBAD | data |
| data2 | |
| data3 | |
| data4 | |
| data5 | |
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