HR 7484

HR 7484

A light curve for V1143 Cygni, plotted from TESS data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension 19h 38m 41.18316s[2]
Declination +54° 58′ 25.6420″[2]
Apparent magnitude (V) 5.889±0.015,[3] 6.37[4]
Characteristics
Spectral type F6V[5] (F5 V + F5 V)[3]
B−V color index 0.482±0.004[5]
Variable type Algol[4]
Astrometry
Radial velocity (Rv)−13.9±0.2[5] km/s
Proper motion (μ) RA: +34.885[2] mas/yr
Dec.: +162.839[2] mas/yr
Parallax (π)24.7090 ± 0.0422 mas[2]
Distance132.0 ± 0.2 ly
(40.47 ± 0.07 pc)
Absolute magnitude (MV)2.83[5]
Orbit[3]
Period (P)7.64075217±0.00000051 d[6]
Semi-major axis (a)22.6950 AU
Eccentricity (e)0.5378±0.0003
Inclination (i)87.0±1.0°
Argument of periastron (ω)
(secondary)		0.860±0.001°
Semi-amplitude (K1)
(primary)		88.02±0.05 km/s
Semi-amplitude (K2)
(secondary)		89.97±0.10 km/s
Details[3]
V1143 Cyg A
Mass1.356±0.003 M☉
Radius1.339±0.023 R☉
Luminosity2.83±0.2[7] L☉
Surface gravity (log g)4.317±0.015 cgs
Temperature6,450±100 K
Metallicity [Fe/H]0.08 dex
Rotational velocity (v sin i)18±3[7] km/s
V1143 Cyg B
Mass1.328±0.002 M☉
Radius1.316±0.023 R☉
Luminosity2.65±0.2[7] L☉
Surface gravity (log g)4.323±0.015 cgs
Temperature6,400±100 K
Rotational velocity (v sin i)28±3[7] km/s
Other designations
V1143 Cyg, HD 185912, HIP 96620, HR 7484, SAO 31850[8]
Database references
SIMBADdata

HR 7484 (V1143 Cyg) is a binary star system in the northern constellation of Cygnus. It is dimly visible to the naked eye under good viewing conditions, having an apparent visual magnitude of 5.89.[3] Based upon an annual parallax shift of 24.71,[2] it is located 132 light years away. The system is moving closer with a heliocentric radial velocity of −14 km/s.[5]

  1. ^ Cite error: The named reference MAST was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference Graczyk2017 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference gcvs was invoked but never defined (see the help page).
  5. ^ a b c d e Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Gimenez1984 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference andersen was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).