Key parameters at a glance

A radius of 13.80 Earth radii
A mass of 311.47 Earth masses
Surface gravity around 1.64 g
An orbital period of 6.088 days
Semi-major axis 0.0600 AU
Distance from Earth 146.87 light-years
Earth Similarity Index 0.307
Travel time at Voyager 1 speed 2,589,978 years
Almost certainly tidally locked to its host star given the close orbit

HD 285507 b Planet Profile

Physical Specs

Radius

13.80 R⊕

Radius (Jupiter)

1.230 R♃

Mass

311.47 M⊕

Mass (Jupiter)

0.980 M♃

Density

0.65 g/cm³

Surface Gravity

1.64 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.307

HZ Position Unknown

Controversial No

Discovery

Year 2013

Method Radial Velocity

Facility Fred Lawrence Whipple Observatory

Telescope 1.5 m Tillinghast Reflector Telescope

Size rank in cohort

Rank by radius

#510of 1771

top 28.7%

This planet

13.80R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

GJ 179 b 13.80 R⊕ GJ 832 b 13.80 R⊕ HD 219415 b 13.80 R⊕

Metric	Earth	HD 285507 b	Jupiter
Radius (R⊕)	1.00	13.80	11.21
Mass (M⊕)	1.00	311.47	317.83
Density (g/cm³)	5.51	0.65	1.33
Surface Gravity (g)	1.00	1.64	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	311.473 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 285507

HIP

HIP 19207

TIC

TIC 389018596

Gaia DR2

Gaia DR2 45159901786525568

Gaia DR3

Gaia DR3 45159901786885632

System

HD 285507

Percentile among Gas Giant cohort

Radius 13.800 R⊕ · percentile 70 / cohort 1771

Mass 311.473 M⊕ · percentile 34 / cohort 1747

Orbital period 6.09 d · percentile 40 / cohort 1533

Distance 45.03 pc · percentile 16 / cohort 1759

ESI 0.307 · percentile 60 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

6.088 days

Semi-major axis

0.0600 AU

Eccentricity

0.090

Inclination

— °

Year Length

A year here lasts approximately 6.09 Earth days (1.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0600 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.307

0 = alien, 1 = Earth-identical

Insufficient insolation data. Close-orbiting tidally-locked around a cool host.

Discovery Paper

Primary reference

Quinn et al. 2014

Instrument

TRES Echelle Spectrograph

Publication

2014-05

Observation locale

Ground

Host System: HD 285507

Spectral Class

K-type orange

Effective Temperature

4,503 K — cooler than the Sun (5,778 K)

Estimated Age

0.62 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.690 R☉

Stellar Mass

0.820 M☉

Metallicity [Fe/H]

0.13

Extended Stellar Properties

Surface gravity (log g)

4.670 dex

Stellar density

1.896 g/cm³

Systemic radial velocity

38.15 km/s

Rotational v·sin i

3.20 km/s

Metallicity ratio

[Fe/H]

Distance

45.03 parsec

Light-years 146.87 ly

V-band magnitude

10.49 mag

Voyager-speed travel 2,589,978 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

22.180 mas

Total Proper Motion

126.376 mas/yr

PM Right Ascension

124.79 mas/yr

PM Declination

-19.97 mas/yr

Galactic Cartesian (pc)

x = 0.456 · y = 0.850 · z = 0.264

Equatorial (J2000)

RA 61.75566° · Dec 15.33494°

Galactic ℓ, b

177.113° · -26.339°

Ecliptic λ, β

62.708° · -5.469°

HTM-20 index

-479189941

Similar Worlds

HD 216536 b

Gas Giant · K-type orange

Radius 13.80 R⊕ · 1,227.1 ly

OGLE-2014-BLG-1760L b

Gas Giant · K-type orange

Radius 13.80 R⊕ · 23,013.6 ly

HD 99283 b

Gas Giant · K-type orange

Radius 13.80 R⊕ · 362.3 ly

Kepler-48 f

Gas Giant · K-type orange

Radius 13.80 R⊕ · 1,000.4 ly

HD 113538 c

Gas Giant · K-type orange

Radius 13.80 R⊕ · 53.1 ly

HD 1605 b

Gas Giant · K-type orange

Radius 13.80 R⊕ · 289.6 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries Fred Lawrence Whipple Observatory Mission K-type orange Hosts