Key parameters at a glance

A radius of 13.70 Earth radii
A mass of 346.43 Earth masses
Surface gravity around 1.85 g
An orbital period of 5.051 days
Semi-major axis 0.0600 AU
Distance from Earth 149.66 light-years
Earth Similarity Index 0.317
Travel time at Voyager 1 speed 2,639,172 years

HIP 91258 b Planet Profile

Physical Specs

Radius

13.70 R⊕

Radius (Jupiter)

1.230 R♃

Mass

346.43 M⊕

Mass (Jupiter)

1.090 M♃

Density

0.74 g/cm³

Surface Gravity

1.85 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.317

HZ Position Unknown

Controversial No

Discovery

Year 2013

Method Radial Velocity

Facility Haute-Provence Observatory

Telescope 1.93 m Telescope

Size rank in cohort

Rank by radius

#554of 1771

top 31.2%

This planet

13.70R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 148164 b 13.70 R⊕ HD 114783 b 13.70 R⊕ HD 159243 b 13.70 R⊕

Metric	Earth	HIP 91258 b	Jupiter
Radius (R⊕)	1.00	13.70	11.21
Mass (M⊕)	1.00	346.43	317.83
Density (g/cm³)	5.51	0.74	1.33
Surface Gravity (g)	1.00	1.85	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	346.435 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HIP

HIP 91258

TIC

TIC 383675945

Gaia DR2

Gaia DR2 2159653734187847168

Gaia DR3

Gaia DR3 2159653734187847168

System

HIP 91258

Percentile among Gas Giant cohort

Radius 13.700 R⊕ · percentile 66 / cohort 1771

Mass 346.435 M⊕ · percentile 37 / cohort 1747

Orbital period 5.05 d · percentile 37 / cohort 1533

Distance 45.88 pc · percentile 17 / cohort 1759

ESI 0.317 · percentile 62 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

5.051 days

Semi-major axis

0.0600 AU

Eccentricity

0.020

Inclination

— °

Year Length

A year here lasts approximately 5.05 Earth days (1.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0600 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.317

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Moutou et al. 2014

Instrument

SOPHIE Spectrograph

Publication

2014-03

Observation locale

Ground

Discovery cohort

Planets confirmed in 2013 at Haute-Provence Observatory (5 shown).

HD 13908 c · Gas Giant HD 113337 b · Gas Giant HD 159243 c · Gas Giant HD 159243 b · Gas Giant HD 13908 b · Gas Giant

Host System: HIP 91258

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,519 K — cooler than the Sun (5,778 K)

Estimated Age

2.40 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.890 R☉

Stellar Mass

0.970 M☉

Metallicity [Fe/H]

0.23

Extended Stellar Properties

Surface gravity (log g)

4.530 dex

Stellar density

1.919 g/cm³

Systemic radial velocity

-9.45 km/s

Rotational v·sin i

3.50 km/s

Metallicity ratio

[Fe/H]

Distance

45.88 parsec

Light-years 149.66 ly

V-band magnitude

8.65 mag

Voyager-speed travel 2,639,172 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

21.765 mas

Total Proper Motion

235.087 mas/yr

PM Right Ascension

-39.49 mas/yr

PM Declination

-231.75 mas/yr

Galactic Cartesian (pc)

x = 0.076 · y = -0.468 · z = 0.880

Equatorial (J2000)

RA 279.22112° · Dec 61.70151°

Galactic ℓ, b

91.361° · 25.357°

Ecliptic λ, β

313.843° · 83.704°

HTM-20 index

717466695