Key parameters at a glance

A radius of 12.90 Earth radii
A mass of 1,554.18 Earth masses
Surface gravity around 9.34 g
An orbital period of 1,010.000 days
Semi-major axis 2.0000 AU
Equilibrium temperature 200 K (-73 °C)
Distance from Earth 619.29 light-years
Earth Similarity Index 0.401
Travel time at Voyager 1 speed 10,921,156 years

1 sibling around TIC 139270665

TIC 139270665 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
TIC 139270665 b	Neptune-like	7.23	147.15	23.624	703	2024
TIC 139270665 c this	Gas Giant	12.90	1,554.18	1,010.000	200	2024

TIC 139270665 c Planet Profile

Physical Specs

Radius

12.90 R⊕

Radius (Jupiter)

1.150 R♃

Mass

1,554.18 M⊕

Mass (Jupiter)

4.890 M♃

Density

3.98 g/cm³

Surface Gravity

9.34 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.401

HZ Position Outer

Controversial No

Discovery

Year 2024

Method Radial Velocity

Facility Lick Observatory

Telescope Automated Planet Finder Telescope

Size rank in cohort

Rank by radius

#1011of 1771

top 57.0%

This planet

12.90R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 55696 b 12.90 R⊕ HD 24040 b 12.90 R⊕ BD-210397 c 12.90 R⊕

Metric	Earth	TIC 139270665 c	Jupiter
Radius (R⊕)	1.00	12.90	11.21
Mass (M⊕)	1.00	1,554.18	317.83
Density (g/cm³)	5.51	3.98	1.33
Surface Gravity (g)	1.00	9.34	2.53
Insolation (S⊕)	1.00	0.21	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	1,554.181 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 139270665

Gaia DR2

Gaia DR2 902448598271728256

Gaia DR3

Gaia DR3 902448598271728256

System

TIC 139270665

Percentile among Gas Giant cohort

Radius 12.900 R⊕ · percentile 41 / cohort 1771

Mass 1,554.181 M⊕ · percentile 75 / cohort 1747

Orbital period 1,010.00 d · percentile 77 / cohort 1533

Distance 189.88 pc · percentile 49 / cohort 1759

ESI 0.401 · percentile 86 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,010.000 days

Semi-major axis

2.0000 AU

Eccentricity

0.566

Inclination

— °

Year Length

A year here lasts about 2.77 Earth years on a highly eccentric trajectory at a mean orbital distance of 2.0000 AU.

Extended Orbital Architecture

Semi-major axis / stellar radius

423.000

Impact parameter (b)

310.000

RV semi-amplitude (K)

116.800 m/s

Transit mid-time (BJD)

2,460,042.0000

Long. of periastron (ω)

-44.30°

Angular separation (arcsec)

10.50000

Eq. Temperature

200K

(-73 °C)

Insolation (S⊕)

0.21

Earth = 1.00

Earth Similarity (ESI)

0.401

0 = alien, 1 = Earth-identical

Beyond the outer HZ boundary (too cold) — surface water would be frozen.

Discovery Paper

Primary reference

Peluso et al. 2024

Instrument

Levy Spectrograph

Publication

2024-04

Observation locale

Ground

Host System: TIC 139270665

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,844 K — hotter than the Sun (5,778 K)

Estimated Age

3.40 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.016 R☉

Stellar Mass

1.035 M☉

Metallicity [Fe/H]

0.16

Extended Stellar Properties

Surface gravity (log g)

4.439 dex

Stellar density

1.390 g/cm³

Rotational v·sin i

4.20 km/s

Metallicity ratio

[Fe/H]

Distance

189.88 parsec

Light-years 619.29 ly

V-band magnitude

10.39 mag

Voyager-speed travel 10,921,156 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

5.238 mas

Total Proper Motion

23.657 mas/yr

PM Right Ascension

12.79 mas/yr

PM Declination

-19.90 mas/yr

Galactic Cartesian (pc)

x = -0.468 · y = 0.693 · z = 0.549

Equatorial (J2000)

RA 124.03390° · Dec 33.29145°

Galactic ℓ, b

188.699° · 31.265°

Ecliptic λ, β

118.714° · 13.183°

HTM-20 index

-922733625