Key parameters at a glance

A radius of 2.05 Earth radii
A mass of 4.55 Earth masses
Surface gravity around 1.08 g
An orbital period of 2.541 days
Semi-major axis 0.0350 AU
Equilibrium temperature 1,371 K (1098 °C)
Distance from Earth 346.73 light-years
Earth Similarity Index 0.188
Travel time at Voyager 1 speed 6,114,524 years

1 sibling around HD 110113

HD 110113 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 110113 b this	Sub-Neptune	2.05	4.55	2.541	1,371	2021
HD 110113 c	Sub-Neptune	2.11	10.50	6.744	990	2021

HD 110113 b Planet Profile

Physical Specs

Radius

2.05 R⊕

Radius (Jupiter)

0.183 R♃

Mass

4.55 M⊕

Mass (Jupiter)

0.014 M♃

Density

2.90 g/cm³

Surface Gravity

1.08 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.188

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

#1888of 1978

top 95.4%

This planet

2.05R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-337 c 2.05 R⊕ Kepler-244 c 2.05 R⊕ Kepler-363 d 2.05 R⊕

Metric	Earth	HD 110113 b	Jupiter
Radius (R⊕)	1.00	2.05	11.21
Mass (M⊕)	1.00	4.55	317.83
Density (g/cm³)	5.51	2.90	1.33
Surface Gravity (g)	1.00	1.08	2.53
Insolation (S⊕)	1.00	735.49	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	4.550 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

HD 110113

HIP

HIP 61820

TIC

TIC 73228647

Gaia DR2

Gaia DR2 6133384959942131968

Gaia DR3

Gaia DR3 6133384959942131968

System

HD 110113

Percentile among Sub-Neptune cohort

Radius 2.050 R⊕ · percentile 4 / cohort 1978

Mass 4.550 M⊕ · percentile 2 / cohort 1978

Orbital period 2.54 d · percentile 4 / cohort 1946

Distance 106.31 pc · percentile 21 / cohort 1975

ESI 0.188 · percentile 5 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

2.541 days

Semi-major axis

0.0350 AU

Eccentricity

0.093

Inclination

87.69 °

Year Length

A year here lasts approximately 2.54 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0350 AU.

Transit Fingerprint

Depth

0.057 %

Duration

2.376 h

Impact parameter b

0.310

Rp / R★

0.018000

Transit midpoint (BJD)

2,458,570.1010

Photometric dip

Transit produces a flux drop of 572 ppm lasting ≈ 2.38 h.

Extended Orbital Architecture

Planet / star radius ratio

0.018000

Semi-major axis / stellar radius

7.750

Impact parameter (b)

0.310

RV semi-amplitude (K)

2.150 m/s

Transit mid-time (BJD)

2,458,570.1010

Long. of periastron (ω)

359.53°

Angular separation (arcsec)

0.32900

Eq. Temperature

1,371K

(1098 °C)

Insolation (S⊕)

735.49

Earth = 1.00

Earth Similarity (ESI)

0.188

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

Osborn et al. 2021

Instrument

TESS CCD Array

Publication

2021-04

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: HD 110113

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,732 K — cooler than the Sun (5,778 K)

Estimated Age

4.00 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.968 R☉

Stellar Mass

0.997 M☉

Metallicity [Fe/H]

0.14

Extended Stellar Properties

Surface gravity (log g)

4.460 dex

Stellar density

1.512 g/cm³

Systemic radial velocity

17.13 km/s

Rotational v·sin i

1.74 km/s

Rotation period

20.80 days

Metallicity ratio

[Fe/H]

Distance

106.31 parsec

Light-years 346.73 ly

V-band magnitude

10.09 mag

Voyager-speed travel 6,114,524 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

9.379 mas

Total Proper Motion

14.182 mas/yr

PM Right Ascension

-3.72 mas/yr

PM Declination

-13.68 mas/yr

Galactic Cartesian (pc)

x = -0.705 · y = -0.125 · z = -0.699

Equatorial (J2000)

RA 190.03656° · Dec -44.31208°

Galactic ℓ, b

300.802° · 18.513°

Ecliptic λ, β

209.103° · -36.251°

HTM-20 index

-843181424