Key parameters at a glance

A radius of 14.00 Earth radii
A mass of 127.13 Earth masses
Surface gravity around 0.65 g
An orbital period of 363.200 days
Semi-major axis 1.0200 AU
Distance from Earth 124.14 light-years
Earth Similarity Index 0.244
Travel time at Voyager 1 speed 2,189,206 years

HD 38283 b Planet Profile

Physical Specs

Radius

14.00 R⊕

Radius (Jupiter)

1.250 R♃

Mass

127.13 M⊕

Mass (Jupiter)

0.400 M♃

Density

0.26 g/cm³

Surface Gravity

0.65 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.244

HZ Position Unknown

Controversial No

Discovery

Year 2010

Method Radial Velocity

Facility Anglo-Australian Telescope

Telescope 3.9 m Anglo-Australian Telescope

Size rank in cohort

Rank by radius

#415of 1771

top 23.4%

This planet

14.00R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 9446 b 14.00 R⊕ HD 156411 b 14.00 R⊕ HD 224693 b 14.00 R⊕

Metric	Earth	HD 38283 b	Jupiter
Radius (R⊕)	1.00	14.00	11.21
Mass (M⊕)	1.00	127.13	317.83
Density (g/cm³)	5.51	0.26	1.33
Surface Gravity (g)	1.00	0.65	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	127.132 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 38283

HIP

HIP 26380

TIC

TIC 141411201

Gaia DR2

Gaia DR2 4650314511916109696

Gaia DR3

Gaia DR3 4650314511916109696

System

HD 38283

Percentile among Gas Giant cohort

Radius 14.000 R⊕ · percentile 74 / cohort 1771

Mass 127.132 M⊕ · percentile 9 / cohort 1747

Orbital period 363.20 d · percentile 63 / cohort 1533

Distance 38.06 pc · percentile 12 / cohort 1759

ESI 0.244 · percentile 42 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

363.200 days

Semi-major axis

1.0200 AU

Eccentricity

0.410

Inclination

— °

Year Length

A year here lasts approximately 363.20 Earth days (99.4% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 1.0200 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.244

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Tinney et al. 2011

Instrument

UCLES Spectrograph

Publication

2011-05

Observation locale

Ground

Host System: HD 38283

Spectral Class

F-type yellow-white

Effective Temperature

5,981 K — hotter than the Sun (5,778 K)

Estimated Age

6.20 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.490 R☉

Stellar Mass

1.370 M☉

Metallicity [Fe/H]

-0.18

Extended Stellar Properties

Surface gravity (log g)

4.230 dex

Stellar density

0.466 g/cm³

Systemic radial velocity

61.40 km/s

Rotational v·sin i

3.00 km/s

Activity index (log R'HK)

-4.970

Metallicity ratio

[Fe/H]

Distance

38.06 parsec

Light-years 124.14 ly

V-band magnitude

6.69 mag

Voyager-speed travel 2,189,206 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

26.244 mas

Total Proper Motion

176.179 mas/yr

PM Right Ascension

138.79 mas/yr

PM Declination

-108.53 mas/yr

Galactic Cartesian (pc)

x = 0.028 · y = 0.279 · z = -0.960

Equatorial (J2000)

RA 84.26053° · Dec -73.69981°

Galactic ℓ, b

284.822° · -31.153°

Ecliptic λ, β

282.596° · -82.607°

HTM-20 index

2081530156