Key parameters at a glance

A radius of 12.50 Earth radii
A mass of 2,800.00 Earth masses
Surface gravity around 17.92 g
An orbital period of 571.250 days
Semi-major axis 1.3700 AU
Equilibrium temperature 249 K (-24 °C)
Distance from Earth 290.11 light-years
Earth Similarity Index 0.453
Travel time at Voyager 1 speed 5,116,088 years

1 sibling around TOI-1736

TOI-1736 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
TOI-1736 b	Sub-Neptune	3.18	12.30	7.073	1,100	2023
TOI-1736 c this	Gas Giant	12.50	2,800.00	571.250	249	2023

TOI-1736 c Planet Profile

Physical Specs

Radius

12.50 R⊕

Radius (Jupiter)

1.120 R♃

Mass

2,800.00 M⊕

Mass (Jupiter)

8.700 M♃

Density

7.88 g/cm³

Surface Gravity

17.92 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.453

HZ Position Habitable

Controversial No

Discovery

Year 2023

Method Radial Velocity

Facility Haute-Provence Observatory

Telescope 1.93 m Telescope

Size rank in cohort

Rank by radius

#1235of 1771

top 69.7%

This planet

12.50R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 156279 c 12.50 R⊕ HD 33283 b 12.50 R⊕ HD 156279 b 12.50 R⊕

Metric	Earth	TOI-1736 c	Jupiter
Radius (R⊕)	1.00	12.50	11.21
Mass (M⊕)	1.00	2,800.00	317.83
Density (g/cm³)	5.51	7.88	1.33
Surface Gravity (g)	1.00	17.92	2.53
Insolation (S⊕)	1.00	0.90	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	2,800.000 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	2,441.000 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 408618999

Gaia DR2

Gaia DR2 541725187117160960

Gaia DR3

Gaia DR3 541725187117160960

System

TOI-1736

Percentile among Gas Giant cohort

Radius 12.500 R⊕ · percentile 28 / cohort 1771

Mass 2,800.000 M⊕ · percentile 85 / cohort 1747

Orbital period 571.25 d · percentile 69 / cohort 1533

Distance 88.95 pc · percentile 33 / cohort 1759

ESI 0.453 · percentile 99 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

571.250 days

Semi-major axis

1.3700 AU

Eccentricity

0.369

Inclination

69.00 °

Year Length

A year here lasts about 1.56 Earth years on a highly eccentric trajectory at a mean orbital distance of 1.3700 AU.

Extended Orbital Architecture

Semi-major axis / stellar radius

213.400

RV semi-amplitude (K)

197.550 m/s

Transit mid-time (BJD)

2,458,701.8100

Long. of periastron (ω)

162.22°

Angular separation (arcsec)

15.40000

Eq. Temperature

249K

(-24 °C)

Insolation (S⊕)

0.90

Earth = 1.00

Earth Similarity (ESI)

0.453

0 = alien, 1 = Earth-identical

Within the conservative habitable zone — surface water would be frozen.

Detection Signatures

Radial velocity

Stellar wobble has been measured spectroscopically.

Astrometry

Positional wobble of the host star was measured.

Discovery Paper

Primary reference

Akana Murphy et al. 2023

Instrument

SOPHIE Spectrograph

Publication

2023-10

Observation locale

Ground

Host System: TOI-1736

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,636 K — cooler than the Sun (5,778 K)

Estimated Age

9.20 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.429 R☉

Stellar Mass

1.037 M☉

Metallicity [Fe/H]

0.15

Extended Stellar Properties

Surface gravity (log g)

4.142 dex

Stellar density

0.497 g/cm³

Rotational v·sin i

4.00 km/s

Rotation period

28.00 days

Activity index (log R'HK)

-5.020

Metallicity ratio

[Fe/H]

Distance

88.95 parsec

Light-years 290.11 ly

V-band magnitude

8.95 mag

Voyager-speed travel 5,116,088 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

11.214 mas

Total Proper Motion

48.485 mas/yr

PM Right Ascension

-46.29 mas/yr

PM Declination

-14.41 mas/yr

Galactic Cartesian (pc)

x = 0.259 · y = 0.245 · z = 0.934

Equatorial (J2000)

RA 43.43446° · Dec 69.10135°

Galactic ℓ, b

133.512° · 8.781°

Ecliptic λ, β

66.527° · 49.426°

HTM-20 index

1395191228