Key parameters at a glance

A radius of 13.00 Earth radii
A mass of 1,160.39 Earth masses
Surface gravity around 6.87 g
An orbital period of 1,569.810 days
Semi-major axis 3.6910 AU
Distance from Earth 179.11 light-years
Earth Similarity Index 0.411
Travel time at Voyager 1 speed 3,158,574 years

omi UMa b Planet Profile

Physical Specs

Radius

13.00 R⊕

Radius (Jupiter)

1.160 R♃

Mass

1,160.39 M⊕

Mass (Jupiter)

3.651 M♃

Density

2.90 g/cm³

Surface Gravity

6.87 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.411

HZ Position Unknown

Controversial No

Discovery

Year 2012

Method Radial Velocity

Facility Okayama Astrophysical Observatory

Telescope 1.88 m 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	omi UMa b	Jupiter
Radius (R⊕)	1.00	13.00	11.21
Mass (M⊕)	1.00	1,160.39	317.83
Density (g/cm³)	5.51	2.90	1.33
Surface Gravity (g)	1.00	6.87	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	1,160.392 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 71369

HIP

HIP 41704

TIC

TIC 73416947

Gaia DR2

Gaia DR2 1041808368494264576

Gaia DR3

Gaia DR3 1041808368494264576

System

omi UMa

Percentile among Gas Giant cohort

Radius 13.000 R⊕ · percentile 43 / cohort 1771

Mass 1,160.392 M⊕ · percentile 70 / cohort 1747

Orbital period 1,569.81 d · percentile 82 / cohort 1533

Distance 54.91 pc · percentile 22 / cohort 1759

ESI 0.411 · percentile 88 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,569.810 days

Semi-major axis

3.6910 AU

Eccentricity

0.149

Inclination

— °

Year Length

A year here lasts about 4.30 Earth years on a mildly elliptical path at a mean orbital distance of 3.6910 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.411

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Sato et al. 2012

Instrument

HIDES Echelle Spectrograph

Publication

2012-12

Observation locale

Ground

Discovery cohort

Planets confirmed in 2012 at Okayama Astrophysical Observatory (5 shown).

75 Cet b · Gas Giant HD 5608 b · Gas Giant omi CrB b · Gas Giant nu Oph b · Gas Giant nu Oph c · Gas Giant

Host System: omi UMa

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,075 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

13.840 R☉

Stellar Mass

2.720 M☉

Metallicity [Fe/H]

-0.16

Extended Stellar Properties

Surface gravity (log g)

2.580 dex

Rotational v·sin i

3.83 km/s

Metallicity ratio

[Fe/H]

Distance

54.91 parsec

Light-years 179.11 ly

V-band magnitude

3.35 mag

Voyager-speed travel 3,158,574 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

18.210 mas

Total Proper Motion

172.105 mas/yr

PM Right Ascension

-134.00 mas/yr

PM Declination

-108.00 mas/yr

Galactic Cartesian (pc)

x = -0.298 · y = 0.388 · z = 0.872

Equatorial (J2000)

RA 127.56495° · Dec 60.71770°

Galactic ℓ, b

155.977° · 35.426°

Ecliptic λ, β

112.991° · 40.243°

HTM-20 index

2037289505

Observation Record

Photometric series

RV measurements

Archive notes