Key parameters at a glance

A radius of 12.40 Earth radii
A mass of 3,623.24 Earth masses
Surface gravity around 23.56 g
An orbital period of 1,888.000 days
Semi-major axis 3.3400 AU
Distance from Earth 305.96 light-years
Earth Similarity Index 0.366
Travel time at Voyager 1 speed 5,395,612 years

HD 106270 b Planet Profile

Physical Specs

Radius

12.40 R⊕

Radius (Jupiter)

1.110 R♃

Mass

3,623.24 M⊕

Mass (Jupiter)

11.400 M♃

Density

10.40 g/cm³

Surface Gravity

23.56 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.366

HZ Position Unknown

Controversial No

Discovery

Year 2011

Method Radial Velocity

Facility W. M. Keck Observatory

Telescope 10 m Keck I Telescope

Size rank in cohort

Rank by radius

#1298of 1771

top 73.2%

This planet

12.40R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 110014 b 12.40 R⊕ CFBDSIR J145829+101343 b 12.40 R⊕ MOA-2010-BLG-073L b 12.40 R⊕

Metric	Earth	HD 106270 b	Jupiter
Radius (R⊕)	1.00	12.40	11.21
Mass (M⊕)	1.00	3,623.24	317.83
Density (g/cm³)	5.51	10.40	1.33
Surface Gravity (g)	1.00	23.56	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	3,623.244 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	3,219.618 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 106270

HIP

HIP 59625

TIC

TIC 176910071

Gaia DR2

Gaia DR2 3581292685166588672

Gaia DR3

Gaia DR3 3581292685166588672

System

HD 106270

Percentile among Gas Giant cohort

Radius 12.400 R⊕ · percentile 25 / cohort 1771

Mass 3,623.244 M⊕ · percentile 90 / cohort 1747

Orbital period 1,888.00 d · percentile 84 / cohort 1533

Distance 93.81 pc · percentile 34 / cohort 1759

ESI 0.366 · percentile 75 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,888.000 days

Semi-major axis

3.3400 AU

Eccentricity

0.185

Inclination

63.00 °

Year Length

A year here lasts about 5.17 Earth years on a mildly elliptical path at a mean orbital distance of 3.3400 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.366

0 = alien, 1 = Earth-identical

Detection Signatures

Radial velocity

Stellar wobble has been measured spectroscopically.

Astrometry

Positional wobble of the host star was measured.

Discovery Paper

Primary reference

Johnson et al. 2011

Instrument

HIRES Spectrometer

Publication

2011-12

Observation locale

Ground

Discovery cohort

Planets confirmed in 2011 at W. M. Keck Observatory (12 shown).

HD 5891 b · Gas Giant HD 102329 b · Gas Giant HD 18742 b · Gas Giant HD 142245 b · Gas Giant CFBDSIR J145829+101343 b · Gas Giant HD 1502 b · Gas Giant HD 108863 b · Gas Giant HD 82886 b · Gas Giant HD 98219 b · Gas Giant HD 152581 b · Gas Giant HD 131496 b · Gas Giant HD 30856 b · Gas Giant

Host System: HD 106270

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,509 K — cooler than the Sun (5,778 K)

Estimated Age

4.30 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

2.660 R☉

Stellar Mass

1.390 M☉

Metallicity [Fe/H]

0.06

Extended Stellar Properties

Surface gravity (log g)

3.720 dex

Systemic radial velocity

24.45 km/s

Rotational v·sin i

3.13 km/s

Metallicity ratio

[Fe/H]

Distance

93.81 parsec

Light-years 305.96 ly

V-band magnitude

7.58 mag

Voyager-speed travel 5,395,612 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

10.632 mas

Total Proper Motion

107.742 mas/yr

PM Right Ascension

-99.04 mas/yr

PM Declination

-42.43 mas/yr

Galactic Cartesian (pc)

x = -0.985 · y = -0.059 · z = -0.165

Equatorial (J2000)

RA 183.40493° · Dec -9.51356°

Galactic ℓ, b

287.595° · 52.228°

Ecliptic λ, β

186.916° · -7.374°

HTM-20 index

-228818745