Key parameters at a glance

A radius of 13.00 Earth radii
A mass of 1,239.53 Earth masses
Surface gravity around 7.33 g
An orbital period of 2,124.540 days
Semi-major axis 3.3180 AU
Distance from Earth 95.49 light-years
Earth Similarity Index 0.415
Travel time at Voyager 1 speed 1,683,885 years

HD 70642 b Planet Profile

Physical Specs

Radius

13.00 R⊕

Radius (Jupiter)

1.160 R♃

Mass

1,239.53 M⊕

Mass (Jupiter)

3.900 M♃

Density

3.10 g/cm³

Surface Gravity

7.33 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.415

HZ Position Unknown

Controversial No

Discovery

Year 2003

Method Radial Velocity

Facility Anglo-Australian Telescope

Telescope 3.9 m Anglo-Australian Telescope

Size rank in cohort

Rank by radius

#960of 1771

top 54.2%

This planet

13.00R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HIP 14810 b 13.00 R⊕ HD 47186 c 13.00 R⊕ WASP-107 c 13.00 R⊕

Metric	Earth	HD 70642 b	Jupiter
Radius (R⊕)	1.00	13.00	11.21
Mass (M⊕)	1.00	1,239.53	317.83
Density (g/cm³)	5.51	3.10	1.33
Surface Gravity (g)	1.00	7.33	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	1,239.531 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	633.435 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 70642

HIP

HIP 40952

TIC

TIC 183356952

Gaia DR2

Gaia DR2 5540006949934104448

Gaia DR3

Gaia DR3 5540006949934104448

System

HD 70642

Percentile among Gas Giant cohort

Radius 13.000 R⊕ · percentile 43 / cohort 1771

Mass 1,239.531 M⊕ · percentile 71 / cohort 1747

Orbital period 2,124.54 d · percentile 85 / cohort 1533

Distance 29.28 pc · percentile 7 / cohort 1759

ESI 0.415 · percentile 90 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

2,124.540 days

Semi-major axis

3.3180 AU

Eccentricity

0.175

Inclination

29.90 °

Year Length

A year here lasts about 5.82 Earth years on a mildly elliptical path at a mean orbital distance of 3.3180 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.415

0 = alien, 1 = Earth-identical

Detection Signatures

Radial velocity

Stellar wobble has been measured spectroscopically.

Astrometry

Positional wobble of the host star was measured.

Discovery Paper

Primary reference

Carter et al. 2003

Instrument

UCLES Spectrograph

Publication

2003-08

Observation locale

Ground

Host System: HD 70642

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,732 K — cooler than the Sun (5,778 K)

Estimated Age

0.92 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.984 R☉

Stellar Mass

1.078 M☉

Metallicity [Fe/H]

0.22

Extended Stellar Properties

Surface gravity (log g)

4.458 dex

Stellar density

1.236 g/cm³

Systemic radial velocity

48.80 km/s

Rotational v·sin i

2.40 km/s

Rotation period

32.00 days

Metallicity ratio

[Fe/H]

Distance

29.28 parsec

Light-years 95.49 ly

V-band magnitude

7.17 mag

Voyager-speed travel 1,683,885 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

34.129 mas

Total Proper Motion

302.229 mas/yr

PM Right Ascension

-201.99 mas/yr

PM Declination

224.82 mas/yr

Galactic Cartesian (pc)

x = -0.445 · y = 0.627 · z = -0.639

Equatorial (J2000)

RA 125.36611° · Dec -39.70444°

Galactic ℓ, b

257.611° · -1.673°

Ecliptic λ, β

144.167° · -56.686°

HTM-20 index

115164539

Observation Record

Photometric series

RV measurements

Archive notes