Key parameters at a glance

A radius of 13.00 Earth radii
A mass of 1,264.96 Earth masses
Surface gravity around 7.48 g
An orbital period of 18.201 days
Semi-major axis 0.1400 AU
Distance from Earth 122.86 light-years
Earth Similarity Index 0.416
Travel time at Voyager 1 speed 2,166,579 years

Context from the literature

HD 195019 b is an exoplanet orbiting around HD 195019 in the binary star system. It has a minimum mass of 3.7 MJ. It orbits very close to the star. Like many planets at close distance, its orbit is circular, even more circular or less eccentric than Earth. It takes 437 hours to orbit with velocity of 83.24 kilometers per second.

Excerpted from Wikipedia · full article

HD 195019 b Planet Profile

Physical Specs

Radius

13.00 R⊕

Radius (Jupiter)

1.160 R♃

Mass

1,264.96 M⊕

Mass (Jupiter)

3.980 M♃

Density

3.16 g/cm³

Surface Gravity

7.48 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.416

HZ Position Unknown

Controversial No

Discovery

Year 1998

Method Radial Velocity

Facility Lick Observatory

Telescope 3.0 m C. Donald Shane Telescope

Size rank in cohort

Rank by radius

#960of 1771

top 54.2%

This planet

13.00R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HIP 14810 b 13.00 R⊕ HD 47186 c 13.00 R⊕ WASP-107 c 13.00 R⊕

Metric	Earth	HD 195019 b	Jupiter
Radius (R⊕)	1.00	13.00	11.21
Mass (M⊕)	1.00	1,264.96	317.83
Density (g/cm³)	5.51	3.16	1.33
Surface Gravity (g)	1.00	7.48	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	1,264.963 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 195019

HIP

HIP 100970

TIC

TIC 210171104

Gaia DR2

Gaia DR2 1815418118373631360

Gaia DR3

Gaia DR3 1815418118373631360

System

HD 195019

Percentile among Gas Giant cohort

Radius 13.000 R⊕ · percentile 43 / cohort 1771

Mass 1,264.963 M⊕ · percentile 71 / cohort 1747

Orbital period 18.20 d · percentile 47 / cohort 1533

Distance 37.67 pc · percentile 12 / cohort 1759

ESI 0.416 · percentile 90 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

18.201 days

Semi-major axis

0.1400 AU

Eccentricity

0.010

Inclination

— °

Year Length

A year here lasts approximately 18.20 Earth days (5.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1400 AU.

Extended Orbital Architecture

RV semi-amplitude (K)

271.500 m/s

Transit mid-time (BJD)

2,453,356.4280

Long. of periastron (ω)

52.00°

Angular separation (arcsec)

3.72000

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.416

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Fischer et al. 1999

Instrument

Hamilton Echelle Spectrograph

Publication

1999-01

Observation locale

Ground

Host System: HD 195019

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,751 K — cooler than the Sun (5,778 K)

Estimated Age

3.20 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.480 R☉

Stellar Mass

1.210 M☉

Metallicity [Fe/H]

0.05

Extended Stellar Properties

Surface gravity (log g)

4.180 dex

Stellar density

0.449 g/cm³

Systemic radial velocity

-93.10 km/s

Rotational v·sin i

2.47 km/s

Activity index (log R'HK)

-5.090

Metallicity ratio

[Fe/H]

Distance

37.67 parsec

Light-years 122.86 ly

V-band magnitude

6.88 mag

Voyager-speed travel 2,166,579 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

26.519 mas

Total Proper Motion

354.191 mas/yr

PM Right Ascension

349.64 mas/yr

PM Declination

-56.57 mas/yr

Galactic Cartesian (pc)

x = 0.571 · y = -0.755 · z = 0.322

Equatorial (J2000)

RA 307.07924° · Dec 18.76925°

Galactic ℓ, b

61.157° · -11.477°

Ecliptic λ, β

315.289° · 36.561°

HTM-20 index

775013148

Observation Record

Photometric series

RV measurements

Stellar spectra

Archive notes

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