Confirmed Exoplanet Discovered 2022

HD 33142 d

A neptune-like orbiting the k-type orange HD 33142, located approximately 395.9 light-years from Earth.

Key parameters at a glance

  • A radius of 9.32 Earth radii
  • A mass of 63.57 Earth masses
  • Surface gravity around 0.73 g
  • An orbital period of 89.900 days
  • Semi-major axis 0.4520 AU
  • Distance from Earth 395.87 light-years
  • Earth Similarity Index 0.320
  • Travel time at Voyager 1 speed 6,981,200 years

2 siblings around HD 33142

HD 33142 d shares its host star with 2 other confirmed planets. Side-by-side measurements below.

Planet Type Radius (R⊕) Mass (M⊕) Period (d) Eq. T (K) Year
HD 33142 d this Neptune-like 9.32 63.57 89.900 — 2022
HD 33142 b Gas Giant 13.70 400.46 330.000 — 2011
HD 33142 c Gas Giant 13.90 282.87 810.200 — 2018

HD 33142 d Planet Profile

Physical Specs

Radius
9.32 R⊕
Radius (Jupiter)
0.832 R♃
Mass
63.57 M⊕
Mass (Jupiter)
0.200 M♃
Density
0.43 g/cm³
Surface Gravity
0.73 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.320
HZ Position Unknown
Controversial No

Discovery

Year 2022
Method Radial Velocity
Facility Multiple Observatories
Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#55of 574

top 9.4%

This planet

9.32R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

HD 137388 b 9.32 R⊕ HD 218566 b 9.32 R⊕ HD 220197 b 9.32 R⊕
Metric Earth HD 33142 d Jupiter
Radius (R⊕)1.009.3211.21
Mass (M⊕)1.0063.57317.83
Density (g/cm³)5.510.431.33
Surface Gravity (g)1.000.732.53
Insolation (S⊕)1.00—0.037

Alternative Mass Estimates

Method Value Interpretation
Minimum mass (M sin i) 63.566 M⊕ Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD

HD 33142

HIP

HIP 23844

TIC

TIC 169397663

Gaia DR2

Gaia DR2 2986948238799721216

Gaia DR3

Gaia DR3 2986948238799721216

System

HD 33142

Percentile among Neptune-like cohort

Radius 9.320 R⊕ · percentile 90 / cohort 574
Mass 63.566 M⊕ · percentile 81 / cohort 574
Orbital period 89.90 d · percentile 80 / cohort 524
Distance 121.38 pc · percentile 27 / cohort 572
ESI 0.320 · percentile 55 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period
89.900 days
Semi-major axis
0.4520 AU
Eccentricity
0.191
Inclination
— °

Year Length

A year here lasts approximately 89.90 Earth days (24.6% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.4520 AU.

Eq. Temperature

—

 

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.320

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Trifonov et al. 2022

Instrument

Multiple Instruments

Publication

2022-06

Observation locale

Ground

Discovery cohort

Planets confirmed in 2022 at Multiple Observatories (12 shown).

Kepler-138 e · Rocky Terrestrial HD 93351 b · Super-Earth GJ 1002 b · Rocky Terrestrial GJ 2030 b · Sub-Neptune GJ 3929 c · Sub-Neptune HD 217786 c · Sub-Neptune GJ 1002 c · Rocky Terrestrial HD 155918 b · Sub-Neptune HD 213519 b · Sub-Neptune HD 191939 g · Sub-Neptune GJ 514 b · Sub-Neptune HD 12235 b · Sub-Neptune

Host System: HD 33142

Spectral Class

K-type orange

Effective Temperature

5,025 K — cooler than the Sun (5,778 K)

Estimated Age

2.72 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

4.170 R☉

Stellar Mass

1.520 M☉

Metallicity [Fe/H]

0.06

Extended Stellar Properties

Surface gravity (log g)

3.375 dex

Systemic radial velocity

33.78 km/s

Rotational v·sin i

2.00 km/s

Metallicity ratio

[Fe/H]

Distance
121.38 parsec
Light-years 395.87 ly
V-band magnitude
7.96 mag
Voyager-speed travel 6,981,200 yr

Multi-band Host Photometry — 11 bands

5.78.98.86B7.96V7.71Gaia7.15TESS6.35J5.90H5.79K5.78W15.72W25.76W35.72W4

Astrometric Data

Parallax

8.210 mas

Total Proper Motion

34.476 mas/yr

PM Right Ascension

-7.51 mas/yr

PM Declination

33.65 mas/yr

Galactic Cartesian (pc)

x = 0.220 · y = 0.945 · z = -0.242

Equatorial (J2000)

RA 76.89806° · Dec -13.98634°

Galactic ℓ, b

214.337° · -29.226°

Ecliptic λ, β

74.072° · -36.704°

HTM-20 index

-545872135

Similar Worlds

HD 218566 b

Neptune-like · K-type orange

Radius 9.32 R⊕ · 94.0 ly

HD 137388 b

Neptune-like · K-type orange

Radius 9.32 R⊕ · 132.0 ly

V1298 Tau b

Neptune-like · K-type orange

Radius 9.41 R⊕ · 352.9 ly

TOI-4600 c

Neptune-like · K-type orange

Radius 9.42 R⊕ · 704.7 ly

Kepler-695 b

Neptune-like · K-type orange

Radius 9.21 R⊕ · 2,749.3 ly

HD 104067 b

Neptune-like · K-type orange

Radius 9.20 R⊕ · 66.4 ly

Explore Related Categories

Neptune-like Planets Radial Velocity Discoveries Multiple Observatories Mission K-type orange Hosts