Key parameters at a glance

A radius of 1.69 Earth radii
A mass of 3.50 Earth masses
Surface gravity around 1.23 g
An orbital period of 19.880 days
Semi-major axis 0.1410 AU
Distance from Earth 82.88 light-years
Earth Similarity Index 0.848
Travel time at Voyager 1 speed 1,461,586 years

2 siblings around HD 96700

HD 96700 c 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 96700 b	Sub-Neptune	2.93	8.90	8.125	—	2021
HD 96700 c this	Super-Earth	1.69	3.50	19.880	—	2021
HD 96700 d	Sub-Neptune	3.61	12.70	103.500	—	2021

HD 96700 c Planet Profile

Physical Specs

Radius

1.69 R⊕

Radius (Jupiter)

0.151 R♃

Mass

3.50 M⊕

Mass (Jupiter)

0.011 M♃

Density

3.98 g/cm³

Surface Gravity

1.23 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.848

HZ Position Unknown

Controversial No

Discovery

Year 2021

Method Radial Velocity

Facility La Silla Observatory

Telescope 3.6 m ESO Telescope

Size rank in cohort

Rank by radius

#415of 1176

top 35.2%

This planet

1.69R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-372 d 1.69 R⊕ Kepler-968 c 1.69 R⊕ Kepler-269 c 1.69 R⊕

Metric	Earth	HD 96700 c	Jupiter
Radius (R⊕)	1.00	1.69	11.21
Mass (M⊕)	1.00	3.50	317.83
Density (g/cm³)	5.51	3.98	1.33
Surface Gravity (g)	1.00	1.23	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	3.500 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 96700

HIP

HIP 54400

TIC

TIC 23270430

Gaia DR2

Gaia DR2 5452492082132835840

Gaia DR3

Gaia DR3 5452492082132835840

System

HD 96700

Percentile among Super-Earth cohort

Radius 1.690 R⊕ · percentile 64 / cohort 1176

Mass 3.500 M⊕ · percentile 58 / cohort 1176

Orbital period 19.88 d · percentile 84 / cohort 1164

Distance 25.41 pc · percentile 5 / cohort 1171

ESI 0.848 · percentile 93 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

19.880 days

Semi-major axis

0.1410 AU

Eccentricity

0.293

Inclination

— °

Year Length

A year here lasts approximately 19.88 Earth days (5.4% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.1410 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.848

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Unger et al. 2021

Instrument

HARPS Spectrograph

Publication

2021-10

Observation locale

Ground

Discovery cohort

Planets confirmed in 2021 at La Silla Observatory (12 shown).

HD 93385 b · Super-Earth HD 39194 b · Super-Earth HD 39194 d · Sub-Neptune HD 154088 b · Sub-Neptune HD 189567 c · Sub-Neptune HD 93385 c · Sub-Neptune HD 39194 c · Sub-Neptune HD 189567 b · Sub-Neptune HD 93385 d · Sub-Neptune HD 96700 b · Sub-Neptune HD 13808 c · Sub-Neptune HD 13808 b · Sub-Neptune

Host System: HD 96700

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,845 K — hotter than the Sun (5,778 K)

Estimated Age

8.60 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.160 R☉

Stellar Mass

0.890 M☉

Metallicity [Fe/H]

-0.18

Extended Stellar Properties

Surface gravity (log g)

4.390 dex

Stellar density

1.003 g/cm³

Systemic radial velocity

12.60 km/s

Rotational v·sin i

1.60 km/s

Activity index (log R'HK)

-4.950

Metallicity ratio

[Fe/H]

Distance

25.41 parsec

Light-years 82.88 ly

V-band magnitude

6.51 mag

Voyager-speed travel 1,461,586 yr

Multi-band Host Photometry — 8 bands

Astrometric Data

Parallax

39.324 mas

Total Proper Motion

522.506 mas/yr

PM Right Ascension

-505.44 mas/yr

PM Declination

-132.44 mas/yr

Galactic Cartesian (pc)

x = -0.842 · y = 0.195 · z = -0.503

Equatorial (J2000)

RA 166.97426° · Dec -30.17514°

Galactic ℓ, b

277.731° · 27.581°

Ecliptic λ, β

181.436° · -32.593°

HTM-20 index

-1905455141