Key parameters at a glance

A radius of 1.80 Earth radii
A mass of 11.10 Earth masses
Surface gravity around 3.43 g
An orbital period of 0.847 days
Semi-major axis 0.0171 AU
Equilibrium temperature 1,400 K (1127 °C)
Distance from Earth 481.00 light-years
Earth Similarity Index 0.176
Travel time at Voyager 1 speed 8,482,467 years

1 sibling around TOI-1347

TOI-1347 b 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-1347 b this	Super-Earth	1.80	11.10	0.847	1,400	2024
TOI-1347 c	Super-Earth	1.60	6.40	4.842	1,000	2024

TOI-1347 b Planet Profile

Physical Specs

Radius

1.80 R⊕

Radius (Jupiter)

0.161 R♃

Mass

11.10 M⊕

Mass (Jupiter)

0.035 M♃

Density

9.90 g/cm³

Surface Gravity

3.43 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.176

HZ Position Inner

Controversial No

Discovery

Year 2024

Method Transit

Facility Transiting Exoplanet Survey Satellite (TESS)

Telescope 0.1 m TESS Telescope

Size rank in cohort

Rank by radius

#253of 1176

top 21.4%

This planet

1.80R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

PSR B1257+12 d 1.80 R⊕ Kepler-11 b 1.80 R⊕ Kepler-148 b 1.80 R⊕

Metric	Earth	TOI-1347 b	Jupiter
Radius (R⊕)	1.00	1.80	11.21
Mass (M⊕)	1.00	11.10	317.83
Density (g/cm³)	5.51	9.90	1.33
Surface Gravity (g)	1.00	3.43	2.53
Insolation (S⊕)	1.00	1,876.13	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	11.100 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 229747848

Gaia DR2

Gaia DR2 2265406171296388992

Gaia DR3

Gaia DR3 2265406171296997888

System

TOI-1347

Percentile among Super-Earth cohort

Radius 1.800 R⊕ · percentile 77 / cohort 1176

Mass 11.100 M⊕ · percentile 97 / cohort 1176

Orbital period 0.85 d · percentile 4 / cohort 1164

Distance 147.48 pc · percentile 20 / cohort 1171

ESI 0.176 · percentile 8 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

0.847 days

Semi-major axis

0.0171 AU

Eccentricity

0.000

Inclination

79.50 °

Year Length

A year here lasts roughly 20.3 hours long on a nearly circular orbit at a mean orbital distance of 0.0171 AU.

Transit Fingerprint

Depth

0.042 %

Duration

0.877 h

Impact parameter b

0.820

Rp / R★

0.020390

Transit midpoint (BJD)

2,458,682.7121

Photometric dip

Transit produces a flux drop of 424 ppm lasting ≈ 0.88 h.

Extended Orbital Architecture

Planet / star radius ratio

0.020390

Semi-major axis / stellar radius

4.430

Impact parameter (b)

0.820

RV semi-amplitude (K)

7.740 m/s

Transit mid-time (BJD)

2,458,682.7121

Long. of periastron (ω)

90.00°

Angular separation (arcsec)

0.11600

Eq. Temperature

1,400K

(1127 °C)

Insolation (S⊕)

1,876.13

Earth = 1.00

Earth Similarity (ESI)

0.176

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Radial velocity

Stellar wobble has been measured spectroscopically.

Discovery Paper

Primary reference

Rubenzahl et al. 2024

Instrument

TESS CCD Array

Publication

2024-02

Observation locale

Space

Discovery cohort

Planets confirmed in 2024 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).

Gliese 12 b · Rocky Terrestrial TOI-6002 b · Super-Earth TOI-5713 b · Super-Earth TOI-4336 A b · Sub-Neptune TOI-406.01 · Sub-Neptune TOI-1224 c · Sub-Neptune LHS 1678 d · Rocky Terrestrial TOI-2088 b · Sub-Neptune TOI-2120 b · Sub-Neptune TOI-1806.01 · Sub-Neptune TOI-4633 c · Sub-Neptune TOI-260 b · Super-Earth

Host System: TOI-1347

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,464 K — cooler than the Sun (5,778 K)

Estimated Age

1.40 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.830 R☉

Stellar Mass

0.913 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.640 dex

Stellar density

2.300 g/cm³

Rotational v·sin i

2.90 km/s

Rotation period

16.10 days

Activity index (log R'HK)

-4.660

Metallicity ratio

[Fe/H]

Distance

147.48 parsec

Light-years 481.00 ly

V-band magnitude

11.17 mag

Voyager-speed travel 8,482,467 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

6.752 mas

Total Proper Motion

26.975 mas/yr

PM Right Ascension

-6.33 mas/yr

PM Declination

26.22 mas/yr

Galactic Cartesian (pc)

x = 0.060 · y = -0.332 · z = 0.941

Equatorial (J2000)

RA 280.32668° · Dec 70.29005°

Galactic ℓ, b

100.863° · 26.266°

Ecliptic λ, β

49.202° · 84.691°

HTM-20 index

-1829291850