HD 205877
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Indus |
| Right ascension | 21h 39m 59.719s |
| Declination | −52° 21′ 32.43″ |
| Apparent magnitude (V) | 6.21 |
| Characteristics | |
| Spectral type | F7III |
| U−B color index | 0.32 |
| B−V color index | 0.596 |
| Astrometry | |
| Proper motion (μ) | RA: −17.62±0.59 mas/yr Dec.: 7.04±0.37 mas/yr |
| Parallax (π) | 5.75±0.55 mas |
| Distance | 570 ± 50 ly (170 ± 20 pc) |
| Orbit | |
| Primary | HD 205877 A |
| Companion | HD 205877 B |
| Period (P) | 21.31±0.74 yr |
| Semi-major axis (a) | 0.0762±0.0084″ |
| Eccentricity (e) | 0.54±0.18 |
| Inclination (i) | 150.4±11.1° |
| Longitude of the node (Ω) | 31.5±74.2° |
| Periastron epoch (T) | 1998.80±1.45 |
| Argument of periastron (ω) (secondary) | 231.4±66.6° |
| Details | |
| A | |
| Mass | 2.34 M☉ |
| B | |
| Mass | 2.20 M☉ |
| Other designations | |
| HDS 3084, HIP 106978, HR 8269, WDS J21400-5222AB | |
| Database references | |
| SIMBAD | data |
HD 205877 is a visual binary star system in the constellation Indus. It also a double lined spectroscopic binary. The components are very similar and both are located on the giant branch in the Hertzsprung–Russell diagram in agreement with the F7III spectral type.