Key parameters at a glance

A radius of 1.76 Earth radii
A mass of 4.90 Earth masses
Surface gravity around 1.58 g
An orbital period of 0.989 days
Semi-major axis 0.0154 AU
Equilibrium temperature 900 K (627 °C)
Distance from Earth 115.05 light-years
Earth Similarity Index 0.329
Travel time at Voyager 1 speed 2,028,853 years
Almost certainly tidally locked to its host star given the close orbit

1 sibling around TOI-1634

TOI-1634 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-1634 b this	Super-Earth	1.76	4.90	0.989	900	2021
TOI-1634 c	Unclassified	—	—	103.000	—	2022

TOI-1634 b Planet Profile

Physical Specs

Radius

1.76 R⊕

Radius (Jupiter)

0.157 R♃

Mass

4.90 M⊕

Mass (Jupiter)

0.015 M♃

Density

5.28 g/cm³

Surface Gravity

1.58 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.329

HZ Position Inner

Controversial No

Discovery

Year 2021

Method Transit

Facility Transiting Exoplanet Survey Satellite (TESS)

Telescope 0.1 m TESS Telescope

Size rank in cohort

Rank by radius

#324of 1176

top 27.5%

This planet

1.76R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-888 b 1.76 R⊕ G 264-012 c 1.76 R⊕ Kepler-755 b 1.76 R⊕

Metric	Earth	TOI-1634 b	Jupiter
Radius (R⊕)	1.00	1.76	11.21
Mass (M⊕)	1.00	4.90	317.83
Density (g/cm³)	5.51	5.28	1.33
Surface Gravity (g)	1.00	1.58	2.53
Insolation (S⊕)	1.00	121.00	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	4.900 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 201186294

Gaia DR2

Gaia DR2 223158499179138432

Gaia DR3

Gaia DR3 223158499179138432

System

TOI-1634

Percentile among Super-Earth cohort

Radius 1.759 R⊕ · percentile 72 / cohort 1176

Mass 4.900 M⊕ · percentile 92 / cohort 1176

Orbital period 0.99 d · percentile 5 / cohort 1164

Distance 35.27 pc · percentile 7 / cohort 1171

ESI 0.329 · percentile 45 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

0.989 days

Semi-major axis

0.0154 AU

Eccentricity

0.000

Inclination

86.66 °

Year Length

A year here lasts roughly 23.7 hours long on a nearly circular orbit at a mean orbital distance of 0.0154 AU.

Transit Fingerprint

Depth

0.132 %

Duration

0.975 h

Impact parameter b

0.431

Rp / R★

0.035800

Transit midpoint (BJD)

2,459,584.9704

Photometric dip

Transit produces a flux drop of 1,323 ppm lasting ≈ 0.97 h.

Extended Orbital Architecture

Planet / star radius ratio

0.035800

Semi-major axis / stellar radius

7.054

Impact parameter (b)

0.431

RV semi-amplitude (K)

5.000 m/s

Transit mid-time (BJD)

2,459,584.9704

Long. of periastron (ω)

90.00°

Angular separation (arcsec)

0.43800

Eq. Temperature

900K

(627 °C)

Insolation (S⊕)

121.00

Earth = 1.00

Earth Similarity (ESI)

0.329

0 = alien, 1 = Earth-identical

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

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

Cloutier et al. 2021

Instrument

TESS CCD Array

Publication

2021-08

Observation locale

Space

Discovery cohort

Planets confirmed in 2021 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).

TOI-2257 b · Sub-Neptune TOI-2285 b · Super-Earth TOI-1231 b · Sub-Neptune AU Mic c · Sub-Neptune LHS 1678 c · Rocky Terrestrial LHS 1478 b · Rocky Terrestrial TOI-2406 b · Sub-Neptune HD 207897 b · Sub-Neptune TOI-269 b · Sub-Neptune TIC 172900988 b · Gas Giant TOI-178 g · Sub-Neptune TOI-2076 d · Sub-Neptune

Host System: TOI-1634

Spectral Class

M-type red dwarf

Effective Temperature

3,550 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.450 R☉

Stellar Mass

0.502 M☉

Metallicity [Fe/H]

0.23

Extended Stellar Properties

Surface gravity (log g)

4.833 dex

Stellar density

7.770 g/cm³

Rotational v·sin i

1.30 km/s

Rotation period

77.00 days

Metallicity ratio

[Fe/H]

Distance

35.27 parsec

Light-years 115.05 ly

V-band magnitude

13.22 mag

Voyager-speed travel 2,028,853 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

28.321 mas

Total Proper Motion

82.749 mas/yr

PM Right Ascension

81.64 mas/yr

PM Declination

13.49 mas/yr

Galactic Cartesian (pc)

x = 0.441 · y = 0.664 · z = 0.603

Equatorial (J2000)

RA 56.39061° · Dec 37.11228°

Galactic ℓ, b

157.383° · -13.852°

Ecliptic λ, β

62.535° · 16.823°

HTM-20 index

1042075105