Key parameters at a glance

A radius of 1.47 Earth radii
A mass of 2.80 Earth masses
Surface gravity around 1.30 g
An orbital period of 1.038 days
Semi-major axis 0.0206 AU
Equilibrium temperature 1,842 K (1569 °C)
Distance from Earth 268.57 light-years
Earth Similarity Index 0.149
Travel time at Voyager 1 speed 4,736,184 years

1 sibling around HD 93963 A

HD 93963 A 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
HD 93963 A b this	Super-Earth	1.47	2.80	1.038	1,842	2022
HD 93963 A c	Sub-Neptune	3.12	18.40	3.645	1,212	2022

HD 93963 A b Planet Profile

Physical Specs

Radius

1.47 R⊕

Radius (Jupiter)

0.131 R♃

Mass

2.80 M⊕

Mass (Jupiter)

0.009 M♃

Density

4.81 g/cm³

Surface Gravity

1.30 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.149

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

#816of 1176

top 69.3%

This planet

1.47R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-10 b 1.47 R⊕ Kepler-137 b 1.47 R⊕ Kepler-292 c 1.47 R⊕

Metric	Earth	HD 93963 A b	Jupiter
Radius (R⊕)	1.00	1.47	11.21
Mass (M⊕)	1.00	2.80	317.83
Density (g/cm³)	5.51	4.81	1.33
Surface Gravity (g)	1.00	1.30	2.53
Insolation (S⊕)	1.00	2,898.00	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	2.800 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

HD 93963 A

TIC

TIC 368435330

Gaia DR2

Gaia DR2 729899906357408768

Gaia DR3

Gaia DR3 729899906357408768

System

HD 93963

Percentile among Super-Earth cohort

Radius 1.470 R⊕ · percentile 31 / cohort 1176

Mass 2.800 M⊕ · percentile 31 / cohort 1176

Orbital period 1.04 d · percentile 6 / cohort 1164

Distance 82.34 pc · percentile 15 / cohort 1171

ESI 0.149 · percentile 4 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

1.038 days

Semi-major axis

0.0206 AU

Eccentricity

0.000

Inclination

86.21 °

Year Length

A year here lasts approximately 1.04 Earth days (0.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0206 AU.

Transit Fingerprint

Depth

0.021 %

Duration

1.816 h

Impact parameter b

0.329

Rp / R★

0.013066

Transit midpoint (BJD)

2,459,635.9260

Photometric dip

Transit produces a flux drop of 210 ppm lasting ≈ 1.82 h.

Extended Orbital Architecture

Planet / star radius ratio

0.013066

Semi-major axis / stellar radius

4.299

Impact parameter (b)

0.329

RV semi-amplitude (K)

1.600 m/s

Transit mid-time (BJD)

2,459,635.9260

Long. of periastron (ω)

90.00°

Angular separation (arcsec)

0.25000

Eq. Temperature

1,842K

(1569 °C)

Insolation (S⊕)

2,898.00

Earth = 1.00

Earth Similarity (ESI)

0.149

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

Serrano et al. 2022

Instrument

TESS CCD Array

Publication

2022-07

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: HD 93963 A

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,908 K — hotter than the Sun (5,778 K)

Estimated Age

1.30 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.031 R☉

Stellar Mass

1.084 M☉

Metallicity [Fe/H]

0.11

Extended Stellar Properties

Surface gravity (log g)

4.445 dex

Stellar density

1.384 g/cm³

Systemic radial velocity

13.28 km/s

Rotational v·sin i

5.90 km/s

Rotation period

12.80 days

Activity index (log R'HK)

-4.630

Metallicity ratio

[Fe/H]

Distance

82.34 parsec

Light-years 268.57 ly

V-band magnitude

9.18 mag

Voyager-speed travel 4,736,184 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

12.116 mas

Total Proper Motion

95.698 mas/yr

PM Right Ascension

-92.84 mas/yr

PM Declination

-23.22 mas/yr

Galactic Cartesian (pc)

x = -0.861 · y = 0.267 · z = 0.433

Equatorial (J2000)

RA 162.77670° · Dec 25.64107°

Galactic ℓ, b

209.207° · 63.074°

Ecliptic λ, β

154.155° · 16.908°

HTM-20 index

-1419707580