NSVS 14256825
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 20h 20m 00.45867s |
| Declination | +04° 37′ 56.5198″ |
| Apparent magnitude (V) | 13.2 |
| Characteristics | |
| Spectral type | sdOB / M V |
| Astrometry | |
| Radial velocity (Rv) | 12.10 ± 1.5 km/s |
| Proper motion (μ) | RA: 8.063 mas/yr Dec.: 1.133 mas/yr |
| Parallax (π) | 1.1929±0.0599 mas |
| Distance | 2,700 ± 100 ly (840 ± 40 pc) |
| Orbit | |
| Period (P) | 0.110374230 d |
| Inclination (i) | 82.5° |
| Periastron epoch (T) | 2454274.20874 JD |
| Details | |
| Mass | 0.528 M☉ |
| Temperature | 42,000 K |
| Other designations | |
| V1828 Aql, 2MASS J20200045+0437564 | |
| Database references | |
| SIMBAD | data |
NSVS 14256825, also known as V1828 Aquilae, is an eclipsing binary system (of the Algol type) in the constellation of Aquila. The system comprises a subdwarf OB star and red dwarf star. The two stars orbit each other every 2.648976 hours. Based on the stellar parallax of the system, observed by Gaia, the system is located approximately 2,700 light-years (840 parsecs) away.
In 2007, Patrick Wils et al. discovered that NSVS 14256825 is an eclipsing binary, by examining the Northern Sky Variability Survey (NSVS) data. They also classified it as an HW Virginis type star, a binary pair in which variability arises from one star reflecting the light of the other as they orbit each other.