Exoplanet

HD 164604 b

Orbiting HD 164604

Overview

HD 164604 b is an exoplanet orbiting the star HD 164604, discovered in 2009 using the Radial Velocity method.

Key Measurements

Mass

4195.33

Earth masses

0500 M⊕

Orbital Period

653.9

days

0.1d10,000d

Distance

39.4

parsecs

Nearby10,000 pc

What these measurements mean

These comparisons use the reported catalog values. They are interpretations and calculations, not additional observations.

A year on this world
One orbit lasts about 1.79 Earth years. This comparison uses the reported orbital period. It does not measure the planet's rotation or the length of its day.
What the mass can tell you
Mass describes how much material the planet contains. Inspect the published uncertainty and reference before combining it with a radius to estimate density. Catalog values can come from different studies.
Work through an exoplanet comparisonArchive measurement definitions

Radius (Earth radii)

Unknown

Mass (Earth masses)

4195.33

Measured

Equilibrium Temperature

Unknown

Parameter source: Xiao et al. 2026

Orbital Period

653.900+1.500−1.700days

Semi-Major Axis

1.3620+0.0120−0.0120au

Planet Mass (Earth masses)

4195.33+572.09−476.74

Planet Mass (Jupiter masses)

13.2000+1.8000−1.5000

Eccentricity

0.4790+0.0270−0.0210

Epoch of Periastron

2453831.30+7.10−6.60days(JD)

Argument of Periastron

64.6+1.7−2.0deg

Radial Velocity Semi-Amplitude

76.20+2.30−1.80m/s

Distance from Earth

39.4 pc (~128 ly)

Spectral Type

K3.5 V

Temperature

4663 K

Mass (Solar)

0.77 M☉

Radius (Solar)

0.78 R☉

Luminosity

-0.59 log L☉

Planets in System

2

Stars in System

1

Coordinates (RA, Dec)

270.7787°, -28.5608°

Discovery Method

Radial Velocity

Discovery Year

2009

Data Sources
NASA Exoplanet Archive

Source ID: HD 164604 b

System Context

HD 164604 b orbits HD 164604 and was reported in 2009 and was detected with the Radial Velocity method.

Published measurements list a mass of 4,195.33 Earth masses and an orbital period of 653.9 days.

Catalog data places the system at about 39.4 parsecs from Earth, a host star classified as K3.5 V, and 2 known planets in the system.

Host star

Explore the stellar record for this system to compare temperature, spectral type, and known planets.

Open HD 164604

More planets in this system

HD 164604 c