Key parameters at a glance

A radius of 13.20 Earth radii
A mass of 874.03 Earth masses
Surface gravity around 5.02 g
An orbital period of 428.500 days
Semi-major axis 1.2620 AU
Distance from Earth 622.80 light-years
Earth Similarity Index 0.391
Travel time at Voyager 1 speed 10,983,160 years

HD 1502 b Planet Profile

Physical Specs

Radius

13.20 R⊕

Radius (Jupiter)

1.180 R♃

Mass

874.03 M⊕

Mass (Jupiter)

2.750 M♃

Density

2.09 g/cm³

Surface Gravity

5.02 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.391

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

#847of 1771

top 47.8%

This planet

13.20R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 12661 c 13.20 R⊕ HD 37605 b 13.20 R⊕ MOA-2009-BLG-387L b 13.20 R⊕

Metric	Earth	HD 1502 b	Jupiter
Radius (R⊕)	1.00	13.20	11.21
Mass (M⊕)	1.00	874.03	317.83
Density (g/cm³)	5.51	2.09	1.33
Surface Gravity (g)	1.00	5.02	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	874.033 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 1502

HIP

HIP 1547

TIC

TIC 303193565

Gaia DR2

Gaia DR2 2768172019308167296

Gaia DR3

Gaia DR3 2768172019308167296

System

HD 1502

Percentile among Gas Giant cohort

Radius 13.200 R⊕ · percentile 49 / cohort 1771

Mass 874.033 M⊕ · percentile 64 / cohort 1747

Orbital period 428.50 d · percentile 65 / cohort 1533

Distance 190.95 pc · percentile 49 / cohort 1759

ESI 0.391 · percentile 83 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

428.500 days

Semi-major axis

1.2620 AU

Eccentricity

0.031

Inclination

— °

Year Length

A year here lasts about 1.17 Earth years on a nearly circular orbit at a mean orbital distance of 1.2620 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.391

0 = alien, 1 = Earth-identical

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 108863 b · Gas Giant HD 82886 b · Gas Giant HD 106270 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 1502

Spectral Class

K-type orange

Effective Temperature

4,947 K — cooler than the Sun (5,778 K)

Estimated Age

2.40 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

4.670 R☉

Stellar Mass

1.460 M☉

Metallicity [Fe/H]

0.09

Extended Stellar Properties

Surface gravity (log g)

3.180 dex

Systemic radial velocity

-9.81 km/s

Rotational v·sin i

2.70 km/s

Metallicity ratio

[Fe/H]

Distance

190.95 parsec

Light-years 622.80 ly

V-band magnitude

8.36 mag

Voyager-speed travel 10,983,160 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

5.210 mas

Total Proper Motion

76.026 mas/yr

PM Right Ascension

74.11 mas/yr

PM Declination

-16.94 mas/yr

Galactic Cartesian (pc)

x = 0.967 · y = 0.082 · z = 0.243

Equatorial (J2000)

RA 4.82144° · Dec 14.05468°

Galactic ℓ, b

111.217° · -48.084°

Ecliptic λ, β

10.051° · 10.975°

HTM-20 index

391160984

Similar Worlds

KMT-2024-BLG-1209L b

Gas Giant · K-type orange

Radius 13.20 R⊕ · 12,817.9 ly

HD 37605 b

Gas Giant · K-type orange

Radius 13.20 R⊕ · 152.6 ly

OGLE-2003-BLG-235L b

Gas Giant · K-type orange

Radius 13.20 R⊕ · 18,917.0 ly

HD 12661 c

Gas Giant · K-type orange

Radius 13.20 R⊕ · 123.4 ly

HD 181342 b

Gas Giant · K-type orange

Radius 13.20 R⊕ · 392.7 ly

HD 145457 b

Gas Giant · K-type orange

Radius 13.20 R⊕ · 441.3 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries W. M. Keck Observatory Mission K-type orange Hosts