Key parameters at a glance

A radius of 14.10 Earth radii
A mass of 209.77 Earth masses
Surface gravity around 1.06 g
An orbital period of 1,145.000 days
Semi-major axis 2.2400 AU
Distance from Earth 196.27 light-years
Earth Similarity Index 0.274
Travel time at Voyager 1 speed 3,461,295 years

HD 170469 b Planet Profile

Physical Specs

Radius

14.10 R⊕

Radius (Jupiter)

1.250 R♃

Mass

209.77 M⊕

Mass (Jupiter)

0.660 M♃

Density

0.41 g/cm³

Surface Gravity

1.06 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.274

HZ Position Unknown

Controversial No

Discovery

Year 2007

Method Radial Velocity

Facility W. M. Keck Observatory

Telescope 10 m Keck I Telescope

Size rank in cohort

Rank by radius

#371of 1771

top 20.9%

This planet

14.10R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 27894 b 14.10 R⊕ HD 103720 b 14.10 R⊕ HD 216770 b 14.10 R⊕

Metric	Earth	HD 170469 b	Jupiter
Radius (R⊕)	1.00	14.10	11.21
Mass (M⊕)	1.00	209.77	317.83
Density (g/cm³)	5.51	0.41	1.33
Surface Gravity (g)	1.00	1.06	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	209.768 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 170469

HIP

HIP 90593

TIC

TIC 320362897

Gaia DR2

Gaia DR2 4484013343859055744

Gaia DR3

Gaia DR3 4484013343859055744

System

HD 170469

Percentile among Gas Giant cohort

Radius 14.100 R⊕ · percentile 77 / cohort 1771

Mass 209.768 M⊕ · percentile 21 / cohort 1747

Orbital period 1,145.00 d · percentile 79 / cohort 1533

Distance 60.18 pc · percentile 25 / cohort 1759

ESI 0.274 · percentile 51 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,145.000 days

Semi-major axis

2.2400 AU

Eccentricity

0.110

Inclination

— °

Year Length

A year here lasts about 3.13 Earth years on a mildly elliptical path at a mean orbital distance of 2.2400 AU.

Extended Orbital Architecture

RV semi-amplitude (K)

12.000 m/s

Transit mid-time (BJD)

2,453,003.0000

Long. of periastron (ω)

34.00°

Angular separation (arcsec)

37.20000

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.274

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Fischer et al. 2007

Instrument

HIRES Spectrometer

Publication

2007-11

Observation locale

Ground

Discovery cohort

Planets confirmed in 2007 at W. M. Keck Observatory (7 shown).

HD 11506 b · Gas Giant HD 125612 b · Gas Giant HD 75898 b · Gas Giant GJ 317 b · Gas Giant HD 5319 b · Gas Giant HD 231701 b · Gas Giant HD 175541 b · Gas Giant

Host System: HD 170469

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,842 K — hotter than the Sun (5,778 K)

Estimated Age

6.70 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.240 R☉

Stellar Mass

1.100 M☉

Metallicity [Fe/H]

0.29

Extended Stellar Properties

Surface gravity (log g)

4.300 dex

Stellar density

0.692 g/cm³

Systemic radial velocity

-59.27 km/s

Rotational v·sin i

1.70 km/s

Rotation period

13.00 days

Activity index (log R'HK)

-5.090

Metallicity ratio

[Fe/H]

Distance

60.18 parsec

Light-years 196.27 ly

V-band magnitude

8.21 mag

Voyager-speed travel 3,461,295 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

16.589 mas

Total Proper Motion

51.473 mas/yr

PM Right Ascension

-48.42 mas/yr

PM Declination

-17.47 mas/yr

Galactic Cartesian (pc)

x = 0.124 · y = -0.971 · z = 0.203

Equatorial (J2000)

RA 277.29554° · Dec 11.69542°

Galactic ℓ, b

40.940° · 10.191°

Ecliptic λ, β

278.718° · 34.914°

HTM-20 index

-1201295399

Observation Record

Photometric series

RV measurements

Stellar spectra

Archive notes