Key parameters at a glance

A radius of 13.50 Earth radii
A mass of 540.31 Earth masses
Surface gravity around 2.96 g
An orbital period of 733.000 days
Semi-major axis 1.7000 AU
Distance from Earth 2,174.12 light-years
Earth Similarity Index 0.352
Travel time at Voyager 1 speed 38,340,604 years

BD+48 740 b Planet Profile

Physical Specs

Radius

13.50 R⊕

Radius (Jupiter)

1.200 R♃

Mass

540.31 M⊕

Mass (Jupiter)

1.700 M♃

Density

1.21 g/cm³

Surface Gravity

2.96 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.352

HZ Position Unknown

Controversial No

Discovery

Year 2018

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#671of 1771

top 37.8%

This planet

13.50R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 45350 b 13.50 R⊕ HD 82943 b 13.50 R⊕ HD 27442 b 13.50 R⊕

Metric	Earth	BD+48 740 b	Jupiter
Radius (R⊕)	1.00	13.50	11.21
Mass (M⊕)	1.00	540.31	317.83
Density (g/cm³)	5.51	1.21	1.33
Surface Gravity (g)	1.00	2.96	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	540.311 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HIP

HIP 12684

TIC

TIC 302070274

Gaia DR2

Gaia DR2 438444868763388800

Gaia DR3

Gaia DR3 438444868763388800

System

BD+48 740

Percentile among Gas Giant cohort

Radius 13.500 R⊕ · percentile 59 / cohort 1771

Mass 540.311 M⊕ · percentile 51 / cohort 1747

Orbital period 733.00 d · percentile 73 / cohort 1533

Distance 666.59 pc · percentile 80 / cohort 1759

ESI 0.352 · percentile 72 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

733.000 days

Semi-major axis

1.7000 AU

Eccentricity

0.760

Inclination

— °

Year Length

A year here lasts about 2.01 Earth years on a highly eccentric trajectory at a mean orbital distance of 1.7000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.352

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Adam Oacute W et al. 2018

Instrument

Multiple Instruments

Publication

2018-05

Observation locale

Ground

Discovery cohort

Planets confirmed in 2018 at Multiple Observatories (5 shown).

LHS 1140 c · Super-Earth TCP J05074264+2447555 b · Neptune-like HD 238914 b · Gas Giant TYC 3318-01333-1 b · Gas Giant CoRoT-20 c · Gas Giant

Host System: BD+48 740

Spectral Class

K-type orange

Effective Temperature

4,534 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

10.330 R☉

Stellar Mass

1.090 M☉

Metallicity [Fe/H]

-0.13

Extended Stellar Properties

Surface gravity (log g)

2.480 dex

Systemic radial velocity

-45.93 km/s

Rotational v·sin i

0.70 km/s

Rotation period

746.00 days

Metallicity ratio

[Fe/H]

Distance

666.59 parsec

Light-years 2,174.12 ly

V-band magnitude

8.69 mag

Voyager-speed travel 38,340,604 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

1.473 mas

Total Proper Motion

5.249 mas/yr

PM Right Ascension

-5.12 mas/yr

PM Declination

-1.14 mas/yr

Galactic Cartesian (pc)

x = 0.498 · y = 0.429 · z = 0.754

Equatorial (J2000)

RA 40.74254° · Dec 48.93006°

Galactic ℓ, b

141.109° · -9.965°

Ecliptic λ, β

54.319° · 31.409°

HTM-20 index

2006228506

Similar Worlds

Kepler-46 c

Gas Giant · K-type orange

Radius 13.50 R⊕ · 2,534.4 ly

HD 222076 b

Gas Giant · K-type orange

Radius 13.50 R⊕ · 297.3 ly

HD 128311 b

Gas Giant · K-type orange

Radius 13.50 R⊕ · 53.3 ly

HD 81688 b

Gas Giant · K-type orange

Radius 13.50 R⊕ · 279.6 ly

HD 47366 c

Gas Giant · K-type orange

Radius 13.50 R⊕ · 275.1 ly

HD 27442 b

Gas Giant · K-type orange

Radius 13.50 R⊕ · 59.6 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries Multiple Observatories Mission K-type orange Hosts