Key parameters at a glance

A radius of 13.19 Earth radii
A mass of 154.78 Earth masses
Surface gravity around 0.89 g
An orbital period of 3.778 days
Equilibrium temperature 1,158 K (885 °C)
Distance from Earth 896.80 light-years
Earth Similarity Index 0.107
Travel time at Voyager 1 speed 15,815,041 years

WASP-110 b Planet Profile

Physical Specs

Radius

13.19 R⊕

Radius (Jupiter)

1.177 R♃

Mass

154.78 M⊕

Mass (Jupiter)

0.487 M♃

Density

0.40 g/cm³

Surface Gravity

0.89 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.107

HZ Position Inner

Controversial No

Discovery

Year 2021

Method Transit

Facility Paranal Observatory

Telescope 8.2 m ESO VLT UT1 Antu Telescope

Size rank in cohort

Rank by radius

#898of 1771

top 50.6%

This planet

13.19R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

MOA-2009-BLG-387L b 13.20 R⊕ HD 12661 c 13.20 R⊕ HD 37605 b 13.20 R⊕

Metric	Earth	WASP-110 b	Jupiter
Radius (R⊕)	1.00	13.19	11.21
Mass (M⊕)	1.00	154.78	317.83
Density (g/cm³)	5.51	0.40	1.33
Surface Gravity (g)	1.00	0.89	2.53
Insolation (S⊕)	1.00	279.00	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	154.782 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 425817867

Gaia DR2

Gaia DR2 6678937478314860160

Gaia DR3

Gaia DR3 6678937478314860160

System

WASP-110

Percentile among Gas Giant cohort

Radius 13.193 R⊕ · percentile 49 / cohort 1771

Mass 154.782 M⊕ · percentile 13 / cohort 1747

Orbital period 3.78 d · percentile 26 / cohort 1533

Distance 274.96 pc · percentile 57 / cohort 1759

ESI 0.107 · percentile 28 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

3.778 days

Semi-major axis

— AU

Eccentricity

0.000

Inclination

88.37 °

Year Length

A year here lasts approximately 3.78 Earth days (1.0% of a terrestrial year) on a nearly circular orbit.

Transit Fingerprint

Depth

2.458 %

Duration

2.830 h

Impact parameter b

0.319

Rp / R★

0.143500

Transit midpoint (BJD)

2,456,502.7242

Photometric dip

Transit produces a flux drop of 24,582 ppm lasting ≈ 2.83 h.

Extended Orbital Architecture

Planet / star radius ratio

0.143500

Semi-major axis / stellar radius

11.200

Impact parameter (b)

0.319

RV semi-amplitude (K)

73.100 m/s

Transit mid-time (BJD)

2,456,502.7242

Eq. Temperature

1,158K

(885 °C)

Insolation (S⊕)

279.00

Earth = 1.00

Earth Similarity (ESI)

0.107

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

Nikolov et al. 2021

Instrument

FORS2 Spectrograph

Publication

2021-09

Observation locale

Ground

Discovery cohort

Planets confirmed in 2021 at Paranal Observatory (3 shown).

HD 5278 c · Neptune-like HD 22496 b · Sub-Neptune b Cen AB b · Gas Giant

Host System: WASP-110

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,392 K — cooler than the Sun (5,778 K)

Estimated Age

11.00 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.853 R☉

Stellar Mass

0.814 M☉

Metallicity [Fe/H]

-0.15

Extended Stellar Properties

Surface gravity (log g)

4.487 dex

Stellar density

1.847 g/cm³

Rotational v·sin i

0.50 km/s

Rotation period

120.10 days

Activity index (log R'HK)

-4.674

Metallicity ratio

[Fe/H]

Distance

274.96 parsec

Light-years 896.80 ly

V-band magnitude

12.76 mag

Voyager-speed travel 15,815,041 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

3.609 mas

Total Proper Motion

66.433 mas/yr

PM Right Ascension

-40.98 mas/yr

PM Declination

-52.29 mas/yr

Galactic Cartesian (pc)

x = 0.421 · y = -0.582 · z = -0.695

Equatorial (J2000)

RA 305.87244° · Dec -44.05870°

Galactic ℓ, b

356.356° · -34.550°

Ecliptic λ, β

297.440° · -23.978°

HTM-20 index

-1818135302