Confirmed Exoplanet Discovered 2015

BD+49 828 b

A gas giant orbiting the k-type orange BD+49 828, located approximately 1,441.7 light-years from Earth.

Key parameters at a glance

  • A radius of 13.50 Earth radii
  • A mass of 508.50 Earth masses
  • Surface gravity around 2.79 g
  • An orbital period of 2,590.000 days
  • Semi-major axis 4.2000 AU
  • Distance from Earth 1,441.75 light-years
  • Earth Similarity Index 0.348
  • Travel time at Voyager 1 speed 25,425,198 years

BD+49 828 b Planet Profile

Physical Specs

Radius
13.50 R⊕
Radius (Jupiter)
1.210 R♃
Mass
508.50 M⊕
Mass (Jupiter)
1.600 M♃
Density
1.14 g/cm³
Surface Gravity
2.79 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.348
HZ Position Unknown
Controversial No

Discovery

Year 2015
Method Radial Velocity
Facility McDonald Observatory
Telescope 9.2 m Hobby-Eberly Telescope

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+49 828 b Jupiter
Radius (R⊕)1.0013.5011.21
Mass (M⊕)1.00508.50317.83
Density (g/cm³)5.511.141.33
Surface Gravity (g)1.002.792.53
Insolation (S⊕)1.00—0.037

Alternative Mass Estimates

Method Value Interpretation
Minimum mass (M sin i) 508.500 M⊕ Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 116376059

Gaia DR2

Gaia DR2 439327501725338752

Gaia DR3

Gaia DR3 439327501725338752

System

BD+49 828

Percentile among Gas Giant cohort

Radius 13.500 R⊕ · percentile 59 / cohort 1771
Mass 508.500 M⊕ · percentile 49 / cohort 1747
Orbital period 2,590.00 d · percentile 87 / cohort 1533
Distance 442.04 pc · percentile 72 / cohort 1759
ESI 0.348 · percentile 70 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period
2,590.000 days
Semi-major axis
4.2000 AU
Eccentricity
0.350
Inclination
— °

Year Length

A year here lasts about 7.09 Earth years on a highly eccentric trajectory at a mean orbital distance of 4.2000 AU.

Eq. Temperature

—

 

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.348

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Niedzielski et al. 2015

Instrument

High Resolution Spectrograph

Publication

2015-04

Observation locale

Ground

Discovery cohort

Planets confirmed in 2015 at McDonald Observatory (3 shown).

HD 95127 b · Gas Giant psi1 Dra B b · Gas Giant HD 216536 b · Gas Giant

Host System: BD+49 828

Spectral Class

K-type orange

Effective Temperature

4,943 K — cooler than the Sun (5,778 K)

Estimated Age

2.34 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

7.600 R☉

Stellar Mass

1.520 M☉

Metallicity [Fe/H]

-0.19

Extended Stellar Properties

Surface gravity (log g)

2.850 dex

Systemic radial velocity

3.61 km/s

Rotational v·sin i

1.70 km/s

Metallicity ratio

[Fe/H]

Distance
442.04 parsec
Light-years 1,441.75 ly
V-band magnitude
9.38 mag
Voyager-speed travel 25,425,198 yr

Multi-band Host Photometry — 11 bands

6.410.510.51B9.38V9.03Gaia8.33TESS7.25J6.73H6.57K6.50W16.53W26.51W36.36W4

Astrometric Data

Parallax

2.234 mas

Total Proper Motion

12.337 mas/yr

PM Right Ascension

7.65 mas/yr

PM Declination

-9.67 mas/yr

Galactic Cartesian (pc)

x = 0.452 · y = 0.462 · z = 0.763

Equatorial (J2000)

RA 45.64062° · Dec 49.72995°

Galactic ℓ, b

143.618° · -7.802°

Ecliptic λ, β

58.148° · 31.079°

HTM-20 index

-79702856

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

BD+48 740 b

Gas Giant · K-type orange

Radius 13.50 R⊕ · 2,174.1 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

Explore Related Categories

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