Key parameters at a glance

A radius of 3.71 Earth radii
A mass of 13.30 Earth masses
Surface gravity around 0.97 g
An orbital period of 29.050 days
Semi-major axis 0.2290 AU
Equilibrium temperature 1,133 K (860 °C)
Distance from Earth 887.85 light-years
Earth Similarity Index 0.186
Travel time at Voyager 1 speed 15,657,271 years

HD 56414 b Planet Profile

Physical Specs

Radius

3.71 R⊕

Radius (Jupiter)

0.331 R♃

Mass

13.30 M⊕

Mass (Jupiter)

0.042 M♃

Density

1.43 g/cm³

Surface Gravity

0.97 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.186

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

#85of 1978

top 4.2%

This planet

3.71R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

LSPM J2116+0234 b 3.71 R⊕ TOI-7009 b 3.71 R⊕ Kepler-146 b 3.71 R⊕

Metric	Earth	HD 56414 b	Jupiter
Radius (R⊕)	1.00	3.71	11.21
Mass (M⊕)	1.00	13.30	317.83
Density (g/cm³)	5.51	1.43	1.33
Surface Gravity (g)	1.00	0.97	2.53
Insolation (S⊕)	1.00	1,614.36	0.037

Star Catalogue Identifiers

HD 56414

TIC

TIC 300038935

Gaia DR2

Gaia DR2 5268547016621360768

Gaia DR3

Gaia DR3 5268547016621360768

System

HD 56414

Percentile among Sub-Neptune cohort

Radius 3.710 R⊕ · percentile 96 / cohort 1978

Mass 13.300 M⊕ · percentile 88 / cohort 1978

Orbital period 29.05 d · percentile 73 / cohort 1946

Distance 272.22 pc · percentile 33 / cohort 1975

ESI 0.186 · percentile 5 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

29.050 days

Semi-major axis

0.2290 AU

Eccentricity

0.680

Inclination

89.30 °

Year Length

A year here lasts approximately 29.05 Earth days (8.0% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.2290 AU.

Transit Fingerprint

Depth

0.030 %

Duration

7.580 h

Impact parameter b

0.340

Transit midpoint (BJD)

2,458,348.3240

Photometric dip

Transit produces a flux drop of 297 ppm lasting ≈ 7.58 h.

Eq. Temperature

1,133K

(860 °C)

Insolation (S⊕)

1,614.36

Earth = 1.00

Earth Similarity (ESI)

0.186

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

Discovery Paper

Primary reference

Giacalone et al. 2022

Instrument

TESS CCD Array

Publication

2022-08

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 56414

Spectral Class

A-type white

Effective Temperature

8,500 K — hotter than the Sun (5,778 K)

Estimated Age

0.42 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.751 R☉

Stellar Mass

1.890 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.260 dex

Stellar density

0.518 g/cm³

Rotational v·sin i

59.40 km/s

Metallicity ratio

[Fe/H]

Distance

272.22 parsec

Light-years 887.85 ly

V-band magnitude

9.22 mag

Voyager-speed travel 15,657,271 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

3.645 mas

Total Proper Motion

35.045 mas/yr

PM Right Ascension

-0.92 mas/yr

PM Declination

35.03 mas/yr

Galactic Cartesian (pc)

x = -0.111 · y = 0.344 · z = -0.933

Equatorial (J2000)

RA 107.84368° · Dec -68.83334°

Galactic ℓ, b

279.854° · -23.410°

Ecliptic λ, β

206.672° · -82.887°

HTM-20 index

-1015114441

Similar Worlds

Kepler-462 b

Sub-Neptune · A-type white

Radius 3.00 R⊕ · 1,945.9 ly

Explore Related Categories

Sub-Neptune Planets Transit Discoveries Transiting Exoplanet Survey Satellite (TESS) Mission A-type white Hosts