Key parameters at a glance

A radius of 12.40 Earth radii
A mass of 3,368.98 Earth masses
Surface gravity around 21.91 g
An orbital period of 1,887.760 days
Semi-major axis 4.6500 AU
Distance from Earth 1,481.57 light-years
Earth Similarity Index 0.374
Travel time at Voyager 1 speed 26,127,431 years

BD+37 3172 b Planet Profile

Physical Specs

Radius

12.40 R⊕

Radius (Jupiter)

1.110 R♃

Mass

3,368.98 M⊕

Mass (Jupiter)

10.600 M♃

Density

9.71 g/cm³

Surface Gravity

21.91 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.374

HZ Position Unknown

Controversial No

Discovery

Year 2023

Method Radial Velocity

Facility McDonald Observatory

Telescope 9.2 m Hobby-Eberly Telescope

Size rank in cohort

Rank by radius

#1298of 1771

top 73.2%

This planet

12.40R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 110014 b 12.40 R⊕ CFBDSIR J145829+101343 b 12.40 R⊕ MOA-2010-BLG-073L b 12.40 R⊕

Metric	Earth	BD+37 3172 b	Jupiter
Radius (R⊕)	1.00	12.40	11.21
Mass (M⊕)	1.00	3,368.98	317.83
Density (g/cm³)	5.51	9.71	1.33
Surface Gravity (g)	1.00	21.91	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	3,368.981 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 289572819

Gaia DR2

Gaia DR2 2096350069476310016

Gaia DR3

Gaia DR3 2096350069476310016

System

BD+37 3172

Percentile among Gas Giant cohort

Radius 12.400 R⊕ · percentile 25 / cohort 1771

Mass 3,368.981 M⊕ · percentile 89 / cohort 1747

Orbital period 1,887.76 d · percentile 84 / cohort 1533

Distance 454.25 pc · percentile 73 / cohort 1759

ESI 0.374 · percentile 77 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,887.760 days

Semi-major axis

4.6500 AU

Eccentricity

0.590

Inclination

— °

Year Length

A year here lasts about 5.17 Earth years on a highly eccentric trajectory at a mean orbital distance of 4.6500 AU.

Extended Orbital Architecture

RV semi-amplitude (K)

89.940 m/s

Transit mid-time (BJD)

2,456,191.5340

Long. of periastron (ω)

100.07°

Angular separation (arcsec)

10.20000

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.374

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Niedzielski et al. 2023

Instrument

High Resolution Spectrograph

Publication

2023-12

Observation locale

Ground

Discovery cohort

Planets confirmed in 2023 at McDonald Observatory (2 shown).

LHS 3154 b · Sub-Neptune BD+42 2315 b · Gas Giant

Host System: BD+37 3172

Spectral Class

K-type orange

Effective Temperature

4,500 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

50.240 R☉

Stellar Mass

3.750 M☉

Metallicity [Fe/H]

-0.03

Extended Stellar Properties

Surface gravity (log g)

1.500 dex

Rotational v·sin i

1.80 km/s

Rotation period

1,406.00 days

Metallicity ratio

[Fe/H]

Distance

454.25 parsec

Light-years 1,481.57 ly

V-band magnitude

9.16 mag

Voyager-speed travel 26,127,431 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

2.173 mas

Total Proper Motion

12.842 mas/yr

PM Right Ascension

-1.15 mas/yr

PM Declination

12.79 mas/yr

Galactic Cartesian (pc)

x = 0.121 · y = -0.777 · z = 0.617

Equatorial (J2000)

RA 278.81551° · Dec 38.11539°

Galactic ℓ, b

66.664° · 19.319°

Ecliptic λ, β

284.450° · 61.113°

HTM-20 index

1433370987

Similar Worlds

HD 87816 c

Gas Giant · K-type orange

Radius 12.40 R⊕ · 434.5 ly

HD 95127 b

Gas Giant · K-type orange

Radius 12.40 R⊕ · 2,206.7 ly

HD 16905 b

Gas Giant · K-type orange

Radius 12.40 R⊕ · 129.6 ly

Gaia-4 b

Gas Giant · K-type orange

Radius 12.40 R⊕ · 239.7 ly

HD 110014 b

Gas Giant · K-type orange

Radius 12.40 R⊕ · 328.6 ly

TYC 4282-00605-1 b

Gas Giant · K-type orange

Radius 12.40 R⊕ · 1,513.8 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries McDonald Observatory Mission K-type orange Hosts