Key parameters at a glance

A radius of 5.12 Earth radii
A mass of 23.00 Earth masses
Surface gravity around 0.88 g
An orbital period of 15.017 days
Semi-major axis 0.1210 AU
Distance from Earth 169.81 light-years
Earth Similarity Index 0.470
Travel time at Voyager 1 speed 2,994,643 years

1 sibling around HD 74698

HD 74698 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 74698 b this	Neptune-like	5.12	23.00	15.017	—	2023
HD 74698 c	Gas Giant	14.00	126.00	3,449.000	—	2023

HD 74698 b Planet Profile

Physical Specs

Radius

5.12 R⊕

Radius (Jupiter)

0.457 R♃

Mass

23.00 M⊕

Mass (Jupiter)

0.070 M♃

Density

0.94 g/cm³

Surface Gravity

0.88 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.470

HZ Position Inner

Controversial No

Discovery

Year 2023

Method Radial Velocity

Facility La Silla Observatory

Telescope 3.6 m ESO Telescope

Size rank in cohort

Rank by radius

#365of 574

top 63.4%

This planet

5.12R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

HIP 48714 b 5.11 R⊕ 61 Vir d 5.11 R⊕ Kepler-1314 b 5.11 R⊕

Metric	Earth	HD 74698 b	Jupiter
Radius (R⊕)	1.00	5.12	11.21
Mass (M⊕)	1.00	23.00	317.83
Density (g/cm³)	5.51	0.94	1.33
Surface Gravity (g)	1.00	0.88	2.53
Insolation (S⊕)	1.00	123.00	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	23.000 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 74698

HIP

HIP 42532

TIC

TIC 308087983

Gaia DR2

Gaia DR2 5220639164696365312

Gaia DR3

Gaia DR3 5220639164696365312

System

HD 74698

Percentile among Neptune-like cohort

Radius 5.120 R⊕ · percentile 36 / cohort 574

Mass 23.000 M⊕ · percentile 38 / cohort 574

Orbital period 15.02 d · percentile 46 / cohort 524

Distance 52.06 pc · percentile 16 / cohort 572

ESI 0.470 · percentile 85 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

15.017 days

Semi-major axis

0.1210 AU

Eccentricity

0.100

Inclination

— °

Year Length

A year here lasts approximately 15.02 Earth days (4.1% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.1210 AU.

Eq. Temperature

—

Insolation (S⊕)

123.00

Earth = 1.00

Earth Similarity (ESI)

0.470

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Frensch et al. 2023

Instrument

HARPS Spectrograph

Publication

2023-06

Observation locale

Ground

Discovery cohort

Planets confirmed in 2023 at La Silla Observatory (12 shown).

GJ 367 c · Super-Earth GJ 367 d · Sub-Neptune TOI-544 c · Neptune-like HD 75302 b · Gas Giant BD-210397 c · Gas Giant HD 108202 b · Gas Giant HIP 54597 b · Gas Giant HD 135625 b · Gas Giant HD 185283 b · Gas Giant HD 73256 c · Gas Giant BD-210397 b · Gas Giant HD 94771 b · Gas Giant

Host System: HD 74698

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,783 K — hotter than the Sun (5,778 K)

Estimated Age

7.85 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.333 R☉

Stellar Mass

1.039 M☉

Metallicity [Fe/H]

0.07

Extended Stellar Properties

Surface gravity (log g)

4.120 dex

Stellar density

0.637 g/cm³

Rotational v·sin i

2.20 km/s

Rotation period

30.00 days

Activity index (log R'HK)

-5.030

Metallicity ratio

[Fe/H]

Distance

52.06 parsec

Light-years 169.81 ly

V-band magnitude

7.78 mag

Voyager-speed travel 2,994,643 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

19.178 mas

Total Proper Motion

122.539 mas/yr

PM Right Ascension

106.12 mas/yr

PM Declination

61.27 mas/yr

Galactic Cartesian (pc)

x = -0.200 · y = 0.238 · z = -0.950

Equatorial (J2000)

RA 130.07448° · Dec -71.87687°

Galactic ℓ, b

286.036° · -17.864°

Ecliptic λ, β

218.561° · -75.161°

HTM-20 index

419951934