Key parameters at a glance

A radius of 21.97 Earth radii
A mass of 1,017.05 Earth masses
Surface gravity around 2.11 g
An orbital period of 43,500.000 days
Semi-major axis 20.8000 AU
Equilibrium temperature 1,392 K (1119 °C)
Distance from Earth 368.77 light-years
Earth Similarity Index 0.078
Travel time at Voyager 1 speed 6,503,171 years

1 sibling around PDS 70

PDS 70 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
PDS 70 b this	Gas Giant	21.97	1,017.05	43,500.000	1,392	2018
PDS 70 c	Gas Giant	22.19	2,383.71	—	1,054	2019

PDS 70 b Planet Profile

Physical Specs

Radius

21.97 R⊕

Radius (Jupiter)

1.960 R♃

Mass

1,017.05 M⊕

Mass (Jupiter)

3.200 M♃

Density

0.53 g/cm³

Surface Gravity

2.11 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.078

HZ Position Unknown

Controversial No

Discovery

Year 2018

Method Imaging

Facility Paranal Observatory

Telescope 8.2 m ESO VLT UT3 Melipal Telescope

Size rank in cohort

Rank by radius

#17of 1771

top 0.9%

This planet

21.97R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

WASP-12 b 22.03 R⊕ PDS 70 c 22.19 R⊕ HAT-P-32 b 22.19 R⊕

Metric	Earth	PDS 70 b	Jupiter
Radius (R⊕)	1.00	21.97	11.21
Mass (M⊕)	1.00	1,017.05	317.83
Density (g/cm³)	5.51	0.53	1.33
Surface Gravity (g)	1.00	2.11	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	1,017.051 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 179413040

Gaia DR2

Gaia DR2 6110141563309613056

Gaia DR3

Gaia DR3 6110141563309613056

System

PDS 70

Percentile among Gas Giant cohort

Radius 21.970 R⊕ · percentile 99 / cohort 1771

Mass 1,017.051 M⊕ · percentile 67 / cohort 1747

Orbital period 43,500.00 d · percentile 99 / cohort 1533

Distance 113.06 pc · percentile 37 / cohort 1759

ESI 0.078 · percentile 17 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

43,500.000 days

Semi-major axis

20.8000 AU

Eccentricity

0.170

Inclination

131.00 °

Year Length

A year here lasts about 119.10 Earth years on a mildly elliptical path at a mean orbital distance of 20.8000 AU.

Eq. Temperature

1,392K

(1119 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.078

0 = alien, 1 = Earth-identical

Insufficient insolation data — the dayside is scorched.

Discovery Paper

Primary reference

Keppler et al. 2018

Instrument

SPHERE

Publication

2018-09

Observation locale

Ground

Host System: PDS 70

Spectral Class

K-type orange

Effective Temperature

4,109 K — cooler than the Sun (5,778 K)

Estimated Age

0.01 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.260 R☉

Stellar Mass

0.982 M☉

Metallicity [Fe/H]

-0.11

Extended Stellar Properties

Surface gravity (log g)

4.230 dex

Stellar density

0.541 g/cm³

Systemic radial velocity

3.13 km/s

Rotational v·sin i

17.27 km/s

Metallicity ratio

[Fe/H]

Distance

113.06 parsec

Light-years 368.77 ly

V-band magnitude

12.03 mag

Voyager-speed travel 6,503,171 yr

Multi-band Host Photometry — 14 bands

Astrometric Data

Parallax

8.816 mas

Total Proper Motion

38.043 mas/yr

PM Right Ascension

-29.66 mas/yr

PM Declination

-23.82 mas/yr

Galactic Cartesian (pc)

x = -0.636 · y = -0.398 · z = -0.661

Equatorial (J2000)

RA 212.04214° · Dec -41.39804°

Galactic ℓ, b

318.062° · 19.208°

Ecliptic λ, β

224.648° · -26.642°

HTM-20 index

605469133

Similar Worlds

PDS 70 c

Gas Giant · K-type orange

Radius 22.19 R⊕ · 368.8 ly

HIP 65 A b

Gas Giant · K-type orange

Radius 22.75 R⊕ · 201.5 ly

GSC 06214-00210 b

Gas Giant · K-type orange

Radius 20.18 R⊕ · 353.9 ly

TOI-2669 b

Gas Giant · K-type orange

Radius 19.73 R⊕ · 1,283.2 ly

CT Cha b

Gas Giant · K-type orange

Radius 24.66 R⊕ · 622.0 ly

1RXS J160929.1-210524 b

Gas Giant · K-type orange

Radius 18.65 R⊕ · 453.8 ly

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