| Observation data EpochJ2000.0 EquinoxJ2000.0 (ICRS) | |
|---|---|
| Constellation | Norma |
| Right ascension | 16h 06m 29.43692s[1] |
| Declination | −45° 10′ 23.4518″[1] |
| Apparent magnitude (V) | 4.74[2] |
| Characteristics | |
| Spectral type | kA3hA7mF0 III:[3] |
| U−Bcolor index | +0.16[2] |
| B−Vcolor index | +0.24[2] |
| Astrometry | |
| Radial velocity (Rv) | −15.5±2.8[4] km/s |
| Proper motion (μ) | RA: −16.19[1]mas/yr Dec.: −38.45[1]mas/yr |
| Parallax (π) | 26.66±0.74 mas[1] |
| Distance | 122 ± 3 ly (38 ± 1 pc) |
| Absolute magnitude (MV) | +1.86[5] |
| Details | |
| Mass | 1.75[6] M☉ |
| Radius | 2.00[6] R☉ |
| Luminosity | 13.4[7] L☉ |
| Surface gravity (log g) | 4.04[8] cgs |
| Temperature | 7,691[8] K |
| Metallicity [Fe/H] | +0.32[8] dex |
| Rotational velocity (v sin i) | 7[6] km/s |
| Age | 62.5±12.5[6] Myr |
| Other designations | |
| δ Nor,CD−44° 10625,FK5 596,HD 144197,HIP 78914,HR 5980,SAO 226500[9] | |
| Database references | |
| SIMBAD | data |
Delta Normae,Latinised fromδ Normae, is astar system in thesouthernconstellation ofNorma. It is visible to the naked eye with anapparent visual magnitude of 4.74.[2] Based upon an annualparallax shift of 26.66 mas as seen from Earth,[1] the system is located about 122 light-years distant from theSun.
Because theproper motion of the star has been found to change over time, this is most likely anastrometric binary.[10][11] The visible component is anAm star, which means it displays thespectrum of ametal-linedA-typechemically peculiar star. Thestellar classification of kA3hA7mF0 III:[3] indicates it is anevolvedgiant with thecalcium K-lines of an A3-class star, thehydrogen lines of an A7 star, and F0-class metallic lines. It has amagnetic field with an effective strength of(169.73±151.7)×10−4 T.[12]
Delta Normae has an estimated 1.75 times themass of the Sun and twice theSun's radius. It is around 63 million years old, and, as with other Am stars, has a relatively low spin rate with aprojected rotational velocity of 7 km/s.[6] The star is radiating 13.4[7] times theSun's luminosity from itsphotosphere at aneffective temperature of7,691 K.[8]
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