TrES-4

Planetary system · 1682.9 light-years away

TrES-4 is 1,683 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this F8 V star; the first was found in 2007 by transit (TrES).

Fly there in 3D

Worth knowing

TrES-4 b goes round its star every 3.55 days, 25 times as often as Mercury goes round the Sun.

TrES-4 is one of 2 stars in its system. The position of the other star is not catalogued, so only TrES-4 and its planets are drawn.

The star

Spectral typeF8 V
Surface temperature6,200 K
Mass1.08 solar masses
Radius1.66 solar radii
Luminosity5.315 times the Sun
Apparent magnitude11.932
Ageabout 2.2 billion years
Distance from the Sun1682.9 light-years (516.0 parsecs)
Position (J2000)RA 268.3043°, Dec 37.2117°
ConstellationHercules

Planets (1)

PlanetYearOrbitRadiusMassFound
TrES-4 b3.55 days0.0508 AU18.046 R⊕247.91 M⊕Transit, 2007

Values are the NASA Exoplanet Archive’s composite parameters. A radius marked estimated comes from a mass–radius relation; a mass marked minimum is M sin i. Planet sizes and colours in the 3D view are renderings: none of these worlds has been photographed as more than a point of light.

The planets, compared

For a star of 6,200 K, 5.3 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 2.14 to 3.73 AU. None of its known planets orbits inside it. The zone says how much starlight arrives, not whether a planet has water or air. The edges follow Kopparapu et al. (2014), as the 3D view draws them.

The light you see left 1,683 years ago, around AD 340.

Nearest systems to it

Also found by TrES

Sources

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