Confirmed Exoplanet Discovered 2023

HD 110067 d

A sub-neptune orbiting the k-type orange HD 110067, located approximately 104.9 light-years from Earth.

Key parameters at a glance

  • A radius of 2.85 Earth radii
  • A mass of 8.52 Earth masses
  • Surface gravity around 1.05 g
  • An orbital period of 20.520 days
  • Semi-major axis 0.1362 AU
  • Equilibrium temperature 602 K (329 °C)
  • Distance from Earth 104.89 light-years
  • Earth Similarity Index 0.398
  • Travel time at Voyager 1 speed 1,849,680 years
  • Almost certainly tidally locked to its host star given the close orbit

5 siblings around HD 110067

HD 110067 d shares its host star with 5 other confirmed planets. Side-by-side measurements below.

Planet Type Radius (R⊕) Mass (M⊕) Period (d) Eq. T (K) Year
HD 110067 b Sub-Neptune 2.20 5.69 9.114 800 2023
HD 110067 c Sub-Neptune 2.39 6.30 13.674 699 2023
HD 110067 d this Sub-Neptune 2.85 8.52 20.520 602 2023
HD 110067 e Super-Earth 1.94 3.90 30.793 533 2023
HD 110067 f Sub-Neptune 2.60 5.04 41.059 489 2023
HD 110067 g Sub-Neptune 2.61 8.40 54.770 440 2023

HD 110067 d Planet Profile

Physical Specs

Radius
2.85 R⊕
Radius (Jupiter)
0.254 R♃
Mass
8.52 M⊕
Mass (Jupiter)
0.027 M♃
Density
2.02 g/cm³
Surface Gravity
1.05 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.398
HZ Position Unknown
Controversial No

Discovery

Year 2023
Method Transit
Facility Multiple Observatories
Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#684of 1978

top 34.5%

This planet

2.85R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

TOI-480 b 2.85 R⊕ Kepler-358 c 2.85 R⊕ Kepler-288 c 2.85 R⊕
Metric Earth HD 110067 d Jupiter
Radius (R⊕)1.002.8511.21
Mass (M⊕)1.008.52317.83
Density (g/cm³)5.512.021.33
Surface Gravity (g)1.001.052.53
Insolation (S⊕)1.00—0.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 8.520 M⊕ Direct mass measurement (not derived).

Star Catalogue Identifiers

HD

HD 110067

TIC

TIC 347332255

Gaia DR2

Gaia DR2 3948424496764080640

Gaia DR3

Gaia DR3 3948424496764080640

System

HD 110067

Percentile among Sub-Neptune cohort

Radius 2.852 R⊕ · percentile 65 / cohort 1978
Mass 8.520 M⊕ · percentile 60 / cohort 1978
Orbital period 20.52 d · percentile 63 / cohort 1946
Distance 32.16 pc · percentile 8 / cohort 1975
ESI 0.398 · percentile 52 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period
20.520 days
Semi-major axis
0.1362 AU
Eccentricity
—
Inclination
89.25 °

Year Length

A year here lasts approximately 20.52 Earth days (5.6% of a terrestrial year) at a mean orbital distance of 0.1362 AU.

Transit Fingerprint

Duration

3.818 h

Impact parameter b

0.488

Rp / R★

0.033200

Transit midpoint (BJD)

2,459,708.2028

Extended Orbital Architecture

Planet / star radius ratio

0.033200

Semi-major axis / stellar radius

37.210

Impact parameter (b)

0.488

RV semi-amplitude (K)

2.320 m/s

Transit mid-time (BJD)

2,459,708.2028

Angular separation (arcsec)

4.24000

Eq. Temperature

602K

(329 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.398

0 = alien, 1 = Earth-identical

Insufficient insolation data — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.

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

Luque et al. 2023

Instrument

Multiple Instruments

Publication

2023-11

Observation locale

Multiple Locales

Discovery cohort

Planets confirmed in 2023 at Multiple Observatories (12 shown).

AU Mic d · Rocky Terrestrial DMPP-4 b · Sub-Neptune HD 110067 g · Sub-Neptune GJ 806 c · Sub-Neptune HD 110067 f · Sub-Neptune HD 110067 e · Super-Earth TIC 279401253 c · Gas Giant HD 112570 b · Gas Giant HD 154391 b · Gas Giant HAT-P-2 c · Gas Giant HD 110067 b · Sub-Neptune HD 110067 c · Sub-Neptune

Host System: HD 110067

Spectral Class

K-type orange

Effective Temperature

5,266 K — cooler than the Sun (5,778 K)

Estimated Age

8.10 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.788 R☉

Stellar Mass

0.798 M☉

Metallicity [Fe/H]

-0.20

Extended Stellar Properties

Surface gravity (log g)

4.540 dex

Stellar density

2.678 g/cm³

Rotational v·sin i

2.50 km/s

Metallicity ratio

[Fe/H]

Distance
32.16 parsec
Light-years 104.89 ly
V-band magnitude
8.42 mag
Voyager-speed travel 1,849,680 yr

Multi-band Host Photometry — 11 bands

6.49.29.20B8.42V8.17Gaia7.66TESS6.95J6.56H6.49K6.45W16.41W26.49W36.40W4

Astrometric Data

Parallax

31.067 mas

Total Proper Motion

132.876 mas/yr

PM Right Ascension

-81.96 mas/yr

PM Declination

-104.59 mas/yr

Galactic Cartesian (pc)

x = -0.926 · y = -0.161 · z = 0.342

Equatorial (J2000)

RA 189.83922° · Dec 20.02734°

Galactic ℓ, b

281.013° · 82.380°

Ecliptic λ, β

180.682° · 22.214°

HTM-20 index

325705678

Similar Worlds

K2-199 c

Sub-Neptune · K-type orange

Radius 2.85 R⊕ · 350.7 ly

Kepler-1388 d

Sub-Neptune · K-type orange

Radius 2.86 R⊕ · 1,480.1 ly

Kepler-304 b

Sub-Neptune · K-type orange

Radius 2.86 R⊕ · 1,417.7 ly

TOI-5789 c

Sub-Neptune · K-type orange

Radius 2.86 R⊕ · 66.7 ly

Kepler-599 b

Sub-Neptune · K-type orange

Radius 2.84 R⊕ · 1,821.6 ly

Kepler-1665 b

Sub-Neptune · K-type orange

Radius 2.84 R⊕ · 1,094.3 ly

Explore Related Categories

Sub-Neptune Planets Transit Discoveries Multiple Observatories Mission K-type orange Hosts