Key parameters at a glance

A radius of 13.90 Earth radii
A mass of 276.51 Earth masses
Surface gravity around 1.43 g
An orbital period of 623.800 days
Semi-major axis 1.4200 AU
Distance from Earth 144.90 light-years
Earth Similarity Index 0.297
Travel time at Voyager 1 speed 2,555,300 years

HD 17674 b Planet Profile

Physical Specs

Radius

13.90 R⊕

Radius (Jupiter)

1.240 R♃

Mass

276.51 M⊕

Mass (Jupiter)

0.870 M♃

Density

0.57 g/cm³

Surface Gravity

1.43 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.297

HZ Position Unknown

Controversial No

Discovery

Year 2017

Method Radial Velocity

Facility Haute-Provence Observatory

Telescope 1.93 m Telescope

Size rank in cohort

Rank by radius

#456of 1771

top 25.7%

This planet

13.90R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

24 Sex c 13.90 R⊕ HD 148156 b 13.90 R⊕ HD 134987 c 13.90 R⊕

Metric	Earth	HD 17674 b	Jupiter
Radius (R⊕)	1.00	13.90	11.21
Mass (M⊕)	1.00	276.51	317.83
Density (g/cm³)	5.51	0.57	1.33
Surface Gravity (g)	1.00	1.43	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	276.512 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 17674

HIP

HIP 13291

TIC

TIC 77490014

Gaia DR2

Gaia DR2 129321160344480512

Gaia DR3

Gaia DR3 129321160344480512

System

HD 17674

Percentile among Gas Giant cohort

Radius 13.900 R⊕ · percentile 72 / cohort 1771

Mass 276.512 M⊕ · percentile 30 / cohort 1747

Orbital period 623.80 d · percentile 71 / cohort 1533

Distance 44.43 pc · percentile 16 / cohort 1759

ESI 0.297 · percentile 57 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

623.800 days

Semi-major axis

1.4200 AU

Eccentricity

0.130

Inclination

— °

Year Length

A year here lasts about 1.71 Earth years on a mildly elliptical path at a mean orbital distance of 1.4200 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.297

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Rey et al. 2017

Instrument

Multiple Instruments

Publication

2017-05

Observation locale

Ground

Discovery cohort

Planets confirmed in 2017 at Haute-Provence Observatory (2 shown).

HD 29021 b · Gas Giant HD 42012 b · Gas Giant

Host System: HD 17674

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,904 K — hotter than the Sun (5,778 K)

Estimated Age

8.40 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.180 R☉

Stellar Mass

0.980 M☉

Metallicity [Fe/H]

-0.16

Extended Stellar Properties

Surface gravity (log g)

4.340 dex

Stellar density

0.859 g/cm³

Systemic radial velocity

10.53 km/s

Rotational v·sin i

2.30 km/s

Metallicity ratio

[Fe/H]

Distance

44.43 parsec

Light-years 144.90 ly

V-band magnitude

7.54 mag

Voyager-speed travel 2,555,300 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

22.480 mas

Total Proper Motion

132.478 mas/yr

PM Right Ascension

128.32 mas/yr

PM Declination

-32.95 mas/yr

Galactic Cartesian (pc)

x = 0.634 · y = 0.586 · z = 0.504

Equatorial (J2000)

RA 42.76850° · Dec 30.28660°

Galactic ℓ, b

151.519° · -25.862°

Ecliptic λ, β

49.357° · 13.266°

HTM-20 index

-1638957945