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  1. Home
  2. Exoplanets
  3. HD 176986 d
Exoplanet

HD 176986 d

Host star: HD 176986Discovered: 2026
Radial VelocityMultiple Observatories

Distance from Earth: 27.8 parsecs (90.6 light years)

Discovery Method: Radial Velocity

The radial velocity (Doppler) method detects the slight wobble a planet induces in its host star as both bodies orbit their common center of mass. By measuring tiny shifts in the star's spectral lines, astronomers can infer the planet's minimum mass and orbital period. This was the first technique to successfully detect exoplanets around Sun-like stars.

Physical Properties

Radius

Unknown

Mass

6.76 M⊕

4.04E25 kg

Orbital Period

61.38 days

0.168 years

Eq. Temperature

363 K

90°C

Orbital Semi-major Axis

0.2815 AU

Density

Unknown

Compared to Earth

Mass

HD 176986 d6.76 M\u2295
Earth1.00 M\u2295

6.76x Earth

Orbital Period

HD 176986 d61.38 days
Earth365.25 days

0.168x Earth

Temperature

HD 176986 d363.00 K
Earth288.00 K

1.26x Earth

Star System: HD 176986

Star Temperature

4,931 K

Star Radius

0.78 R☉

Star Mass

0.79 M☉

Planets in System

3

Stars in System

1

Habitability Assessment

Temperature Range

363 K is outside the range for liquid water (180-310 K).

Stellar Flux

Receives 4.09x Earth's insolation, outside the habitable zone.

Habitable Zone

This planet orbits outside the estimated habitable zone of its star.

Habitability assessments are rough estimates based on limited available data. True habitability depends on many additional factors including atmospheric composition, magnetic field presence, tidal locking, and stellar activity. These assessments should not be considered definitive.

Exoplanet ExplorerNASA Archive

All Exoplanets

Solar System

The Sun

Glossary

ISS Tracker

Eccentricity

Unknown

Insolation Flux

4.09 S⊕

Earth flux = 1.0