Key parameters at a glance

A radius of 1.17 Earth radii
A mass of 1.71 Earth masses
Surface gravity around 1.25 g
An orbital period of 0.409 days
Semi-major axis 0.0071 AU
Equilibrium temperature 1,072 K (799 °C)
Distance from Earth 134.27 light-years
Earth Similarity Index 0.291
Travel time at Voyager 1 speed 2,367,764 years
Almost certainly tidally locked to its host star given the close orbit

TOI-1442 b Planet Profile

Physical Specs

Radius

1.17 R⊕

Radius (Jupiter)

0.104 R♃

Mass

1.71 M⊕

Mass (Jupiter)

0.005 M♃

Density

5.87 g/cm³

Surface Gravity

1.25 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.291

HZ Position Inner

Controversial No

Discovery

Year 2022

Method Transit

Facility Transiting Exoplanet Survey Satellite (TESS)

Telescope 0.1 m TESS Telescope

Size rank in cohort

Rank by radius

#135of 570

top 23.5%

This planet

1.17R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-339 d 1.17 R⊕ Kepler-185 b 1.17 R⊕ Kepler-647 b 1.17 R⊕

Metric	Earth	TOI-1442 b	Jupiter
Radius (R⊕)	1.00	1.17	11.21
Mass (M⊕)	1.00	1.71	317.83
Density (g/cm³)	5.51	5.87	1.33
Surface Gravity (g)	1.00	1.25	2.53
Insolation (S⊕)	1.00	207.02	0.037

Star Catalogue Identifiers

TIC

TIC 235683377

Gaia DR2

Gaia DR2 2265154211335825152

Gaia DR3

Gaia DR3 2265154211335825152

System

TOI-1442

Percentile among Rocky Terrestrial cohort

Radius 1.170 R⊕ · percentile 75 / cohort 570

Mass 1.710 M⊕ · percentile 69 / cohort 570

Orbital period 0.41 d · percentile 2 / cohort 567

Distance 41.17 pc · percentile 17 / cohort 566

ESI 0.291 · percentile 36 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

0.409 days

Semi-major axis

0.0071 AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts roughly 9.8 hours long at a mean orbital distance of 0.0071 AU.

Transit Fingerprint

Depth

0.128 %

Duration

0.617 h

Impact parameter b

0.330

Transit midpoint (BJD)

2,458,683.4523

Photometric dip

Transit produces a flux drop of 1,281 ppm lasting ≈ 0.62 h.

Eq. Temperature

1,072K

(799 °C)

Insolation (S⊕)

207.02

Earth = 1.00

Earth Similarity (ESI)

0.291

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched. Close-orbiting tidally-locked around a cool host.

Discovery Paper

Primary reference

Giacalone et al. 2022

Instrument

TESS CCD Array

Publication

2022-02

Observation locale

Space

Discovery cohort

Planets confirmed in 2022 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).

TOI-1452 b · Super-Earth TOI-712 d · Sub-Neptune TOI-1468 c · Sub-Neptune TOI-2136 b · Sub-Neptune LTT 1445 A c · Rocky Terrestrial TOI-712 c · Sub-Neptune LP 890-9 b · Super-Earth TOI-2081 b · Sub-Neptune GJ 3929 b · Rocky Terrestrial HD 260655 c · Super-Earth HD 73583 c · Sub-Neptune TOI-1759 b · Sub-Neptune

Host System: TOI-1442

Spectral Class

M-type red dwarf

Effective Temperature

3,330 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.310 R☉

Stellar Mass

0.290 M☉

Metallicity [Fe/H]

—

Distance

41.17 parsec

Light-years 134.27 ly

V-band magnitude

15.39 mag

Voyager-speed travel 2,367,764 yr

Multi-band Host Photometry — 6 bands

Astrometric Data

Parallax

24.263 mas

Total Proper Motion

470.032 mas/yr

PM Right Ascension

82.06 mas/yr

PM Declination

462.81 mas/yr

Galactic Cartesian (pc)

x = 0.081 · y = -0.260 · z = 0.962

Equatorial (J2000)

RA 287.29210° · Dec 74.17428°

Galactic ℓ, b

105.499° · 24.831°

Ecliptic λ, β

60.586° · 80.498°

HTM-20 index

-618505063