Key parameters at a glance

A radius of 9.99 Earth radii
A mass of 71.40 Earth masses
Surface gravity around 0.72 g
An orbital period of 6.959 days
Semi-major axis 0.0748 AU
Equilibrium temperature 1,175 K (902 °C)
Distance from Earth 415.13 light-years
Earth Similarity Index 0.112
Travel time at Voyager 1 speed 7,320,841 years

1 sibling around HIP 67522

HIP 67522 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
HIP 67522 b this	Neptune-like	9.99	71.40	6.959	1,175	2020
HIP 67522 c	Neptune-like	7.94	48.30	14.335	917	2024

HIP 67522 b Planet Profile

Physical Specs

Radius

9.99 R⊕

Radius (Jupiter)

0.891 R♃

Mass

71.40 M⊕

Mass (Jupiter)

0.225 M♃

Density

0.39 g/cm³

Surface Gravity

0.72 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.112

HZ Position Inner

Controversial No

Discovery

Year 2020

Method Transit

Facility Transiting Exoplanet Survey Satellite (TESS)

Telescope 0.1 m TESS Telescope

Size rank in cohort

Rank by radius

#1of 574

top 0.0%

This planet

9.99R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

Kepler-424 b 9.98 R⊕ WASP-130 b 9.98 R⊕ Lupus-TR-3 b 9.98 R⊕

Metric	Earth	HIP 67522 b	Jupiter
Radius (R⊕)	1.00	9.99	11.21
Mass (M⊕)	1.00	71.40	317.83
Density (g/cm³)	5.51	0.39	1.33
Surface Gravity (g)	1.00	0.72	2.53
Insolation (S⊕)	1.00	341.09	0.037

Star Catalogue Identifiers

HD 120411

HIP

HIP 67522

TIC

TIC 166527623

Gaia DR2

Gaia DR2 6113920619134019456

Gaia DR3

Gaia DR3 6113920619134019456

System

HIP 67522

Percentile among Neptune-like cohort

Radius 9.987 R⊕ · percentile 100 / cohort 574

Mass 71.400 M⊕ · percentile 87 / cohort 574

Orbital period 6.96 d · percentile 28 / cohort 524

Distance 127.28 pc · percentile 28 / cohort 572

ESI 0.112 · percentile 4 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

6.959 days

Semi-major axis

0.0748 AU

Eccentricity

0.064

Inclination

89.88 °

Year Length

A year here lasts approximately 6.96 Earth days (1.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0748 AU.

Transit Fingerprint

Depth

0.421 %

Duration

4.850 h

Impact parameter b

0.030

Rp / R★

0.066440

Transit midpoint (BJD)

2,458,604.0238

Photometric dip

Transit produces a flux drop of 4,210 ppm lasting ≈ 4.85 h.

Extended Orbital Architecture

Planet / star radius ratio

0.066440

Semi-major axis / stellar radius

11.660

Impact parameter (b)

0.030

Transit mid-time (BJD)

2,458,604.0238

Long. of periastron (ω)

195.30°

Sky-projected obliquity (λ)

-5.80°

True obliquity (ψ)

20.20°

Angular separation (arcsec)

0.58800

Eq. Temperature

1,175K

(902 °C)

Insolation (S⊕)

341.09

Earth = 1.00

Earth Similarity (ESI)

0.112

0 = alien, 1 = Earth-identical

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

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Transit timing variations

Gravitational interactions from neighbours have been detected.

Discovery Paper

Primary reference

Rizzuto et al. 2020

Instrument

TESS CCD Array

Publication

2020-07

Observation locale

Space

Discovery cohort

Planets confirmed in 2020 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).

TOI-700 d · Rocky Terrestrial TOI-237 b · Super-Earth TOI-700 b · Rocky Terrestrial TOI-1266 c · Super-Earth LTT 3780 c · Sub-Neptune TOI-700 c · Sub-Neptune TOI-776 c · Sub-Neptune TOI-942 c · Neptune-like TOI-776 b · Super-Earth TOI-1266 b · Sub-Neptune TOI-540 b · Rocky Terrestrial LHS 1815 b · Rocky Terrestrial

Host System: HIP 67522

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,675 K — cooler than the Sun (5,778 K)

Estimated Age

0.02 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.380 R☉

Stellar Mass

1.220 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.000 dex

Stellar density

0.629 g/cm³

Systemic radial velocity

7.41 km/s

Rotational v·sin i

54.20 km/s

Rotation period

1.42 days

Metallicity ratio

[Fe/H]

Distance

127.28 parsec

Light-years 415.13 ly

V-band magnitude

9.79 mag

Voyager-speed travel 7,320,841 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

7.829 mas

Total Proper Motion

36.534 mas/yr

PM Right Ascension

-28.84 mas/yr

PM Declination

-22.42 mas/yr

Galactic Cartesian (pc)

x = -0.671 · y = -0.350 · z = -0.654

Equatorial (J2000)

RA 207.52600° · Dec -40.83590°

Galactic ℓ, b

314.748° · 20.686°

Ecliptic λ, β

220.883° · -27.442°

HTM-20 index

-193571194