Key parameters at a glance

A radius of 2.63 Earth radii
A mass of 9.32 Earth masses
Surface gravity around 1.35 g
An orbital period of 12.274 days
Semi-major axis 0.1011 AU
Equilibrium temperature 800 K (527 °C)
Distance from Earth 310.26 light-years
Earth Similarity Index 0.320
Travel time at Voyager 1 speed 5,471,500 years

1 sibling around TOI-763

TOI-763 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-763 b	Sub-Neptune	2.28	9.79	5.606	1,038	2020
TOI-763 c this	Sub-Neptune	2.63	9.32	12.274	800	2020

TOI-763 c Planet Profile

Physical Specs

Radius

2.63 R⊕

Radius (Jupiter)

0.235 R♃

Mass

9.32 M⊕

Mass (Jupiter)

0.029 M♃

Density

2.82 g/cm³

Surface Gravity

1.35 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.320

HZ Position Inner

Controversial No

Discovery

Year 2020

Method Transit

Facility Transiting Exoplanet Survey Satellite (TESS)

Telescope 0.1 m TESS Telescope

Size rank in cohort

Rank by radius

#969of 1978

top 48.9%

This planet

2.63R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1241 b 2.63 R⊕ GJ 3473 c 2.63 R⊕ Kepler-319 c 2.63 R⊕

Metric	Earth	TOI-763 c	Jupiter
Radius (R⊕)	1.00	2.63	11.21
Mass (M⊕)	1.00	9.32	317.83
Density (g/cm³)	5.51	2.82	1.33
Surface Gravity (g)	1.00	1.35	2.53
Insolation (S⊕)	1.00	64.32	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	9.320 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	9.500 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 178819686

Gaia DR2

Gaia DR2 6140553127216043648

Gaia DR3

Gaia DR3 6140553127216043648

System

TOI-763

Percentile among Sub-Neptune cohort

Radius 2.630 R⊕ · percentile 50 / cohort 1978

Mass 9.320 M⊕ · percentile 68 / cohort 1978

Orbital period 12.27 d · percentile 42 / cohort 1946

Distance 95.13 pc · percentile 19 / cohort 1975

ESI 0.320 · percentile 33 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

12.274 days

Semi-major axis

0.1011 AU

Eccentricity

0.040

Inclination

— °

Year Length

A year here lasts approximately 12.27 Earth days (3.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1011 AU.

Transit Fingerprint

Depth

0.087 %

Duration

3.840 h

Impact parameter b

0.510

Rp / R★

0.027000

Transit midpoint (BJD)

2,458,572.9661

Photometric dip

Transit produces a flux drop of 870 ppm lasting ≈ 3.84 h.

Extended Orbital Architecture

Planet / star radius ratio

0.027000

Impact parameter (b)

0.510

RV semi-amplitude (K)

2.780 m/s

Transit mid-time (BJD)

2,458,572.9661

Long. of periastron (ω)

62.00°

Angular separation (arcsec)

1.06000

Eq. Temperature

800K

(527 °C)

Insolation (S⊕)

64.32

Earth = 1.00

Earth Similarity (ESI)

0.320

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.

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

Fridlund et al. 2020

Instrument

TESS CCD Array

Publication

2020-11

Observation locale

Space

Discovery cohort

Planets confirmed in 2020 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).

TOI-700 d · Rocky Terrestrial TOI-237 b · Super-Earth TOI-700 b · Rocky Terrestrial TOI-1266 c · Super-Earth LTT 3780 c · Sub-Neptune TOI-700 c · Sub-Neptune TOI-776 c · Sub-Neptune TOI-942 c · Neptune-like TOI-776 b · Super-Earth TOI-1266 b · Sub-Neptune TOI-540 b · Rocky Terrestrial LHS 1815 b · Rocky Terrestrial

Host System: TOI-763

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,450 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.897 R☉

Stellar Mass

0.917 M☉

Metallicity [Fe/H]

0.01

Extended Stellar Properties

Surface gravity (log g)

4.450 dex

Stellar density

1.834 g/cm³

Systemic radial velocity

-13.68 km/s

Rotational v·sin i

1.70 km/s

Rotation period

27.00 days

Metallicity ratio

[Fe/H]

Distance

95.13 parsec

Light-years 310.26 ly

V-band magnitude

10.27 mag

Voyager-speed travel 5,471,500 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

10.484 mas

Total Proper Motion

114.489 mas/yr

PM Right Ascension

-76.90 mas/yr

PM Declination

-84.82 mas/yr

Galactic Cartesian (pc)

x = -0.744 · y = -0.192 · z = -0.640

Equatorial (J2000)

RA 194.46810° · Dec -39.75806°

Galactic ℓ, b

304.276° · 23.097°

Ecliptic λ, β

210.045° · -30.689°

HTM-20 index

-598258067