46 Aquilae

46 Aquilae
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 19h 42m 12.81242s[1]
Declination 12° 11′ 35.7382″[1]
Apparent magnitude (V) 6.33[2]
Characteristics
Spectral type B9III[3]
U−B color index −0.42[4]
B−V color index −0.077±0.004[2]
Astrometry
Radial velocity (Rv)−24.7±1.6[2] km/s
Proper motion (μ) RA: −0.495[1] mas/yr
Dec.: −8.147[1] mas/yr
Parallax (π)3.9251 ± 0.0579 mas[1]
Distance830 ± 10 ly
(255 ± 4 pc)
Absolute magnitude (MV)−0.32[2]
Details[5]
Luminosity179.50[2] L☉
Surface gravity (log g)3.7 cgs
Temperature12,900 K
Metallicity [Fe/H]0.50[6] dex
Rotational velocity (v sin i)1.0±0.5 km/s
Other designations
46 Aql, BD+11° 3954, GC 27263, HD 186122, HIP 96931, HR 7493, SAO 105156[3]
Database references
SIMBADdata

46 Aquilae is a star in the constellation of Aquila, located to the north of Tarazed (γ Aquilae). 46 Aquilae is its Flamsteed designation. It is a dim, blue-white hued star that is a challenge to view with the naked eye, having an apparent visual magnitude of 6.33.[2] This object is located approximately 830 light years from the Sun, based on parallax.[1] It is moving closer to the Earth with a heliocentric radial velocity of −25 km/s.[2]

This body has a stellar classification of B9 III,[7] matching a late B-type giant star. It is a chemically peculiar star of a weak Mercury-Manganese type (CP3),[8] and is the most chromium–deficient star known.[9] The star may possess a magnetic field with a strength greater than 2 kG.[10] It is radiating 180[2] times the luminosity of the Sun from its photosphere at an effective temperature of 12,900 K.[5]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference UBV was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Bailey2013 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Smith1993 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Cowley1969 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Ghazaryan2018 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Savanov2003 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Hubrig2001 was invoked but never defined (see the help page).