Confirmed Exoplanet Discovered 2013

BD+15 2940 b

A gas giant orbiting the k-type orange BD+15 2940, located approximately 1,390.8 light-years from Earth.

Key parameters at a glance

  • A radius of 13.70 Earth radii
  • A mass of 352.78 Earth masses
  • Surface gravity around 1.88 g
  • An orbital period of 137.480 days
  • Semi-major axis 0.5390 AU
  • Distance from Earth 1,390.79 light-years
  • Earth Similarity Index 0.318
  • Travel time at Voyager 1 speed 24,526,658 years

BD+15 2940 b Planet Profile

Physical Specs

Radius
13.70 R⊕
Radius (Jupiter)
1.230 R♃
Mass
352.78 M⊕
Mass (Jupiter)
1.110 M♃
Density
0.75 g/cm³
Surface Gravity
1.88 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.318
HZ Position Unknown
Controversial No

Discovery

Year 2013
Method Radial Velocity
Facility McDonald Observatory
Telescope 9.2 m Hobby-Eberly 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 BD+15 2940 b Jupiter
Radius (R⊕)1.0013.7011.21
Mass (M⊕)1.00352.78317.83
Density (g/cm³)5.510.751.33
Surface Gravity (g)1.001.882.53
Insolation (S⊕)1.00—0.037

Alternative Mass Estimates

Method Value Interpretation
Minimum mass (M sin i) 352.780 M⊕ Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HIP

HIP 78407

TIC

TIC 393702609

Gaia DR2

Gaia DR2 1193071962699902336

Gaia DR3

Gaia DR3 1193071962699902336

System

BD+15 2940

Percentile among Gas Giant cohort

Radius 13.700 R⊕ · percentile 66 / cohort 1771
Mass 352.780 M⊕ · percentile 38 / cohort 1747
Orbital period 137.48 d · percentile 55 / cohort 1533
Distance 426.42 pc · percentile 71 / cohort 1759
ESI 0.318 · percentile 62 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period
137.480 days
Semi-major axis
0.5390 AU
Eccentricity
0.260
Inclination
— °

Year Length

A year here lasts approximately 137.48 Earth days (37.6% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.5390 AU.

Eq. Temperature

—

 

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.318

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Nowak et al. 2013

Instrument

High Resolution Spectrograph

Publication

2013-06

Observation locale

Ground

Discovery cohort

Planets confirmed in 2013 at McDonald Observatory (2 shown).

HD 233604 b · Gas Giant GJ 328 b · Gas Giant

Host System: BD+15 2940

Spectral Class

K-type orange

Effective Temperature

4,796 K — cooler than the Sun (5,778 K)

Estimated Age

7.10 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

14.700 R☉

Stellar Mass

1.100 M☉

Metallicity [Fe/H]

0.28

Extended Stellar Properties

Surface gravity (log g)

2.800 dex

Systemic radial velocity

36.71 km/s

Rotational v·sin i

2.30 km/s

Metallicity ratio

[Fe/H]

Distance
426.42 parsec
Light-years 1,390.79 ly
V-band magnitude
9.01 mag
Voyager-speed travel 24,526,658 yr

Multi-band Host Photometry — 11 bands

6.410.110.12B9.01V8.72Gaia8.10TESS7.15J6.66H6.53K6.53W16.54W26.50W36.38W4

Astrometric Data

Parallax

2.317 mas

Total Proper Motion

44.552 mas/yr

PM Right Ascension

15.14 mas/yr

PM Declination

-41.90 mas/yr

Galactic Cartesian (pc)

x = -0.480 · y = -0.835 · z = 0.268

Equatorial (J2000)

RA 240.09564° · Dec 15.54675°

Galactic ℓ, b

28.104° · 44.780°

Ecliptic λ, β

233.935° · 35.318°

HTM-20 index

-565969685

Similar Worlds

HD 116029 c

Gas Giant · K-type orange

Radius 13.70 R⊕ · 402.0 ly

HD 114783 b

Gas Giant · K-type orange

Radius 13.70 R⊕ · 68.7 ly

HD 208897 b

Gas Giant · K-type orange

Radius 13.70 R⊕ · 220.1 ly

HD 100508 b

Gas Giant · K-type orange

Radius 13.70 R⊕ · 106.8 ly

HD 5608 b

Gas Giant · K-type orange

Radius 13.70 R⊕ · 189.5 ly

HD 130322 b

Gas Giant · K-type orange

Radius 13.70 R⊕ · 104.0 ly

Explore Related Categories

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