Key parameters at a glance

A radius of 13.50 Earth radii
A mass of 568.89 Earth masses
Surface gravity around 3.12 g
An orbital period of 963.600 days
Semi-major axis 1.9200 AU
Distance from Earth 152.88 light-years
Earth Similarity Index 0.355
Travel time at Voyager 1 speed 2,696,040 years

HD 45350 b Planet Profile

Physical Specs

Radius

13.50 R⊕

Radius (Jupiter)

1.200 R♃

Mass

568.89 M⊕

Mass (Jupiter)

1.790 M♃

Density

1.27 g/cm³

Surface Gravity

3.12 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.355

HZ Position Unknown

Controversial No

Discovery

Year 2004

Method Radial Velocity

Facility W. M. Keck Observatory

Telescope 10 m Keck I 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 27442 b 13.50 R⊕ HD 66428 c 13.50 R⊕ HD 82943 b 13.50 R⊕

Metric	Earth	HD 45350 b	Jupiter
Radius (R⊕)	1.00	13.50	11.21
Mass (M⊕)	1.00	568.89	317.83
Density (g/cm³)	5.51	1.27	1.33
Surface Gravity (g)	1.00	3.12	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	568.890 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 45350

HIP

HIP 30860

TIC

TIC 144132551

Gaia DR2

Gaia DR2 955758320761687680

Gaia DR3

Gaia DR3 955758320761687680

System

HD 45350

Percentile among Gas Giant cohort

Radius 13.500 R⊕ · percentile 59 / cohort 1771

Mass 568.890 M⊕ · percentile 52 / cohort 1747

Orbital period 963.60 d · percentile 76 / cohort 1533

Distance 46.87 pc · percentile 18 / cohort 1759

ESI 0.355 · percentile 72 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

963.600 days

Semi-major axis

1.9200 AU

Eccentricity

0.778

Inclination

— °

Year Length

A year here lasts about 2.64 Earth years on a highly eccentric trajectory at a mean orbital distance of 1.9200 AU.

Extended Orbital Architecture

RV semi-amplitude (K)

58.000 m/s

Transit mid-time (BJD)

2,453,802.1000

Long. of periastron (ω)

343.40°

Angular separation (arcsec)

41.00000

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.355

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Marcy et al. 2005

Instrument

HIRES Spectrometer

Publication

2005-01

Observation locale

Ground

Discovery cohort

Planets confirmed in 2004 at W. M. Keck Observatory (6 shown).

HD 99492 b · Neptune-like HD 183263 b · Gas Giant HD 117207 b · Gas Giant HD 188015 b · Gas Giant GJ 436 b · Neptune-like HD 88133 b · Gas Giant

Host System: HD 45350

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,566 K — cooler than the Sun (5,778 K)

Estimated Age

8.00 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.264 R☉

Stellar Mass

0.980 M☉

Metallicity [Fe/H]

0.23

Extended Stellar Properties

Surface gravity (log g)

4.226 dex

Stellar density

0.683 g/cm³

Systemic radial velocity

-20.73 km/s

Rotational v·sin i

1.40 km/s

Activity index (log R'HK)

-5.100

Metallicity ratio

[M/H]

Distance

46.87 parsec

Light-years 152.88 ly

V-band magnitude

7.89 mag

Voyager-speed travel 2,696,040 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

21.306 mas

Total Proper Motion

68.508 mas/yr

PM Right Ascension

-42.77 mas/yr

PM Declination

-53.51 mas/yr

Galactic Cartesian (pc)

x = -0.097 · y = 0.771 · z = 0.629

Equatorial (J2000)

RA 97.19023° · Dec 38.96273°

Galactic ℓ, b

175.388° · 12.613°

Ecliptic λ, β

95.797° · 15.668°

HTM-20 index

1987141324

Observation Record

Photometric series

RV measurements

Stellar spectra