Key parameters at a glance

A radius of 13.70 Earth radii
A mass of 356.29 Earth masses
Surface gravity around 1.90 g
An orbital period of 676.600 days
Semi-major axis 1.7000 AU
Distance from Earth 388.57 light-years
Earth Similarity Index 0.318
Travel time at Voyager 1 speed 6,852,475 years

HD 14787 b Planet Profile

Physical Specs

Radius

13.70 R⊕

Radius (Jupiter)

1.230 R♃

Mass

356.29 M⊕

Mass (Jupiter)

1.121 M♃

Density

0.76 g/cm³

Surface Gravity

1.90 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.318

HZ Position Unknown

Controversial No

Discovery

Year 2018

Method Radial Velocity

Facility W. M. Keck Observatory

Telescope 10 m Keck I Telescope

Size rank in cohort

Rank by radius

#554of 1771

top 31.2%

This planet

13.70R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 148164 b 13.70 R⊕ HD 114783 b 13.70 R⊕ HD 159243 b 13.70 R⊕

Metric	Earth	HD 14787 b	Jupiter
Radius (R⊕)	1.00	13.70	11.21
Mass (M⊕)	1.00	356.29	317.83
Density (g/cm³)	5.51	0.76	1.33
Surface Gravity (g)	1.00	1.90	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	356.287 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 14787

HIP

HIP 11130

TIC

TIC 380966347

Gaia DR2

Gaia DR2 24570756281835392

Gaia DR3

Gaia DR3 24570756281835392

System

HD 14787

Percentile among Gas Giant cohort

Radius 13.700 R⊕ · percentile 66 / cohort 1771

Mass 356.287 M⊕ · percentile 38 / cohort 1747

Orbital period 676.60 d · percentile 72 / cohort 1533

Distance 119.14 pc · percentile 38 / cohort 1759

ESI 0.318 · percentile 62 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

676.600 days

Semi-major axis

1.7000 AU

Eccentricity

0.155

Inclination

— °

Year Length

A year here lasts about 1.85 Earth years on a mildly elliptical path at a mean orbital distance of 1.7000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.318

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Luhn et al. 2019

Instrument

HIRES Spectrometer

Publication

2019-04

Observation locale

Ground

Discovery cohort

Planets confirmed in 2018 at W. M. Keck Observatory (12 shown).

HD 75784 c · Gas Giant HD 99706 c · Gas Giant HD 148164 c · Gas Giant HD 55696 b · Gas Giant HD 95089 c · Gas Giant HD 13167 b · Gas Giant HD 18015 b · Gas Giant HAT-P-11 c · Gas Giant HD 156279 c · Gas Giant HD 98736 b · Gas Giant HD 180053 b · Gas Giant HD 114783 c · Gas Giant

Host System: HD 14787

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

4,946 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

5.010 R☉

Stellar Mass

1.430 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

3.230 dex

Systemic radial velocity

-8.14 km/s

Metallicity ratio

[M/H]

Distance

119.14 parsec

Light-years 388.57 ly

V-band magnitude

7.63 mag

Voyager-speed travel 6,852,475 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

8.365 mas

Total Proper Motion

16.212 mas/yr

PM Right Ascension

-11.10 mas/yr

PM Declination

11.81 mas/yr

Galactic Cartesian (pc)

x = 0.797 · y = 0.575 · z = 0.188

Equatorial (J2000)

RA 35.80851° · Dec 10.83680°

Galactic ℓ, b

156.380° · -45.989°

Ecliptic λ, β

37.078° · -3.215°

HTM-20 index

137340831