HD 41742 and HD 41700
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Puppis |
| HD 41742 A | |
| Right ascension | 06h 04m 40.101s |
| Declination | −45° 04′ 44.10″ |
| Apparent magnitude (V) | 5.975±0.009 |
| HD 41742 B | |
| Right ascension | 06h 04m 39.782s |
| Declination | −45° 04′ 48.78″ |
| Apparent magnitude (V) | 8.867±0.028 |
| HD 41700 (C) | |
| Right ascension | 06h 04m 28.439s |
| Declination | −45° 02′ 11.77″ |
| Apparent magnitude (V) | 6.343±0.010 |
| Characteristics | |
| HD 41742 A | |
| Spectral type | F6V/K-MV(MS) |
| B−V color index | 0.493±0.009 |
| HD 41742 B | |
| Spectral type | K3V |
| B−V color index | 1.014±0.076 |
| HD 41700 (C) | |
| Spectral type | F7.5V |
| B−V color index | 0.517±0.005 |
| Astrometry | |
| HD 41742 A | |
| Radial velocity (Rv) | 27.0±2.5 km/s |
| Proper motion (μ) | RA: −80.831 mas/yr Dec.: +251.617 mas/yr |
| Parallax (π) | 35.779±0.2768 mas |
| Distance | 91.2 ± 0.7 ly (27.9 ± 0.2 pc) |
| Absolute magnitude (MV) | 3.853±0.024 |
| HD 41742 B | |
| Proper motion (μ) | RA: −84.025 mas/yr Dec.: 237.521 mas/yr |
| Parallax (π) | 37.0030±0.0525 mas |
| Distance | 88.1 ± 0.1 ly (27.02 ± 0.04 pc) |
| Absolute magnitude (MV) | 6.745±0.043 |
| HD 41700 (C) | |
| Radial velocity (Rv) | 27.4±0.4 km/s |
| Proper motion (μ) | RA: −82.262 mas/yr Dec.: 246.246 mas/yr |
| Parallax (π) | 36.8531±0.0162 mas |
| Distance | 88.50 ± 0.04 ly (27.13 ± 0.01 pc) |
| Absolute magnitude (MV) | 4.221±0.025 |
| Details | |
| HD 41742 A | |
| Mass | 1.20+0.07 −0.06 M☉ / ~≥0.21 ± 0.06 M☉ |
| Radius | 1.4 R☉ |
| Luminosity | 2.7 L☉ |
| Surface gravity (log g) | 4.30 ± ~0.10 cgs |
| Temperature | 6,363±85 K |
| Metallicity [Fe/H] | −0.17±0.10 dex |
| Rotation | ≤2.0 days (maximum rotational period, derived from v sin i if i = 90°) |
| Rotational velocity (v sin i) | 26.7±1.3 km/s |
| Age | 3.3 Gyr |
| HD 41742 B | |
| Mass | 0.80 M☉ |
| Radius | 0.93 R☉ |
| Luminosity | 0.25 L☉ |
| Surface gravity (log g) | 4.38 cgs |
| Temperature | 4,294 K |
| Metallicity [Fe/H] | −0.22 dex |
| HD 41700 (C) | |
| Mass | 1.13+0.04 −0.07 M☉ |
| Radius | 1.2 R☉ |
| Luminosity | 1.8 L☉ |
| Surface gravity (log g) | 4.36 cgs |
| Temperature | 6,165±80 K |
| Metallicity [Fe/H] | −0.19±0.10 dex |
| Rotational velocity (v sin i) | 16.6±1.0 km/s |
| Age | 3.7 Gyr |
| Other designations | |
| HD 41742 A: HIP 28790, TYC 8101-1755-1, HR 2158 | |
| HD 41742 B: TYC 8101-1757-1 | |
| HD 41700 (C): HIP 28764, GJ 9200, TYC 8101-309-1, HR 2157 | |
| Database references | |
| HD 41742 A | |
| SIMBAD | data |
| HD 41742 B | |
| SIMBAD | data |
| HD 41700 (C) | |
| SIMBAD | data |
HD 41742 and HD 41700 is a star system that lies approximately 88 light-years away in the constellation of Puppis. The system consists of two bright stars where the primary is orbited by two fainter stars, making it a quadruple with an unequal hierarchy.