Key parameters at a glance

A radius of 13.90 Earth radii
A mass of 289.23 Earth masses
Surface gravity around 1.50 g
An orbital period of 392.600 days
Semi-major axis 1.0000 AU
Distance from Earth 2,842.43 light-years
Earth Similarity Index 0.300
Travel time at Voyager 1 speed 50,126,192 years

BD+48 738 b Planet Profile

Physical Specs

Radius

13.90 R⊕

Radius (Jupiter)

1.240 R♃

Mass

289.23 M⊕

Mass (Jupiter)

0.910 M♃

Density

0.59 g/cm³

Surface Gravity

1.50 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.300

HZ Position Unknown

Controversial No

Discovery

Year 2011

Method Radial Velocity

Facility McDonald Observatory

Telescope 9.2 m Hobby-Eberly 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	BD+48 738 b	Jupiter
Radius (R⊕)	1.00	13.90	11.21
Mass (M⊕)	1.00	289.23	317.83
Density (g/cm³)	5.51	0.59	1.33
Surface Gravity (g)	1.00	1.50	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	289.225 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 302069358

Gaia DR2

Gaia DR2 438899345022759424

Gaia DR3

Gaia DR3 438899345022759424

System

BD+48 738

Percentile among Gas Giant cohort

Radius 13.900 R⊕ · percentile 72 / cohort 1771

Mass 289.225 M⊕ · percentile 32 / cohort 1747

Orbital period 392.60 d · percentile 64 / cohort 1533

Distance 871.49 pc · percentile 84 / cohort 1759

ESI 0.300 · percentile 58 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

392.600 days

Semi-major axis

1.0000 AU

Eccentricity

0.200

Inclination

— °

Year Length

A year here lasts about 1.07 Earth years on a mildly elliptical path at a mean orbital distance of 1.0000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.300

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Gettel et al. 2012

Instrument

High Resolution Spectrograph

Publication

2012-01

Observation locale

Ground

Discovery cohort

Planets confirmed in 2011 at McDonald Observatory (4 shown).

HD 220773 b · Gas Giant HD 79498 b · Gas Giant HD 240237 b · Gas Giant HD 96127 b · Gas Giant

Host System: BD+48 738

Spectral Class

K-type orange

Effective Temperature

4,414 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

11.000 R☉

Stellar Mass

0.740 M☉

Metallicity [Fe/H]

-0.20

Extended Stellar Properties

Surface gravity (log g)

2.240 dex

Systemic radial velocity

-5.81 km/s

Rotational v·sin i

1.00 km/s

Metallicity ratio

[Fe/H]

Distance

871.49 parsec

Light-years 2,842.43 ly

V-band magnitude

9.14 mag

Voyager-speed travel 50,126,192 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

1.121 mas

Total Proper Motion

6.881 mas/yr

PM Right Ascension

2.81 mas/yr

PM Declination

-6.28 mas/yr

Galactic Cartesian (pc)

x = 0.491 · y = 0.423 · z = 0.761

Equatorial (J2000)

RA 40.71029° · Dec 49.58694°

Galactic ℓ, b

140.808° · -9.379°

Ecliptic λ, β

54.569° · 32.030°

HTM-20 index

1744157463

Similar Worlds

HD 2952 b

Gas Giant · K-type orange

Radius 13.90 R⊕ · 359.1 ly

HIP 111909 c

Gas Giant · K-type orange

Radius 13.90 R⊕ · 287.3 ly

HIP 34222 b

Gas Giant · K-type orange

Radius 13.90 R⊕ · 74.5 ly

HD 128356 b

Gas Giant · K-type orange

Radius 13.90 R⊕ · 85.3 ly

HIP 65407 c

Gas Giant · K-type orange

Radius 13.90 R⊕ · 201.5 ly

24 Sex c

Gas Giant · K-type orange

Radius 13.90 R⊕ · 235.1 ly

Explore Related Categories

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