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 | 1.38 R☉ |
| Luminosity | 2.667 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 | 0.900 R☉ |
| Luminosity | 0.248 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 | 1.197 R☉ |
| Luminosity | 1.789 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.
The fainter star HD 41700 was designated Rho Columbae (ρ Col) by Nicolas Louis de Lacaille before Francis Baily included it in Puppis and leaving it undesignated.