Key parameters at a glance

A radius of 13.40 Earth radii
A mass of 638.84 Earth masses
Surface gravity around 3.56 g
An orbital period of 551.400 days
Semi-major axis 1.6000 AU
Distance from Earth 345.00 light-years
Earth Similarity Index 0.366
Travel time at Voyager 1 speed 6,084,155 years

HD 33844 b Planet Profile

Physical Specs

Radius

13.40 R⊕

Radius (Jupiter)

1.190 R♃

Mass

638.84 M⊕

Mass (Jupiter)

2.010 M♃

Density

1.46 g/cm³

Surface Gravity

3.56 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.366

HZ Position Unknown

Controversial No

Discovery

Year 2015

Method Radial Velocity

Facility Anglo-Australian Telescope

Telescope 3.9 m Anglo-Australian Telescope

Size rank in cohort

Rank by radius

#730of 1771

top 41.2%

This planet

13.40R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 114783 c 13.40 R⊕ HIP 79431 b 13.40 R⊕ HD 68988 b 13.40 R⊕

Metric	Earth	HD 33844 b	Jupiter
Radius (R⊕)	1.00	13.40	11.21
Mass (M⊕)	1.00	638.84	317.83
Density (g/cm³)	5.51	1.46	1.33
Surface Gravity (g)	1.00	3.56	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	638.838 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 33844

HIP

HIP 24275

TIC

TIC 169534187

Gaia DR2

Gaia DR2 2986593268342544768

Gaia DR3

Gaia DR3 2986593268342544768

System

HD 33844

Percentile among Gas Giant cohort

Radius 13.400 R⊕ · percentile 56 / cohort 1771

Mass 638.838 M⊕ · percentile 55 / cohort 1747

Orbital period 551.40 d · percentile 69 / cohort 1533

Distance 105.78 pc · percentile 36 / cohort 1759

ESI 0.366 · percentile 75 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

551.400 days

Semi-major axis

1.6000 AU

Eccentricity

0.150

Inclination

— °

Year Length

A year here lasts about 1.51 Earth years on a mildly elliptical path at a mean orbital distance of 1.6000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.366

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Wittenmyer et al. 2016

Instrument

UCLES Spectrograph

Publication

2016-02

Observation locale

Ground

Host System: HD 33844

Spectral Class

K-type orange

Effective Temperature

4,861 K — cooler than the Sun (5,778 K)

Estimated Age

2.42 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

5.390 R☉

Stellar Mass

1.840 M☉

Metallicity [Fe/H]

0.27

Extended Stellar Properties

Surface gravity (log g)

3.240 dex

Systemic radial velocity

36.49 km/s

Rotational v·sin i

3.44 km/s

Metallicity ratio

[Fe/H]

Distance

105.78 parsec

Light-years 345.00 ly

V-band magnitude

7.29 mag

Voyager-speed travel 6,084,155 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

9.425 mas

Total Proper Motion

45.194 mas/yr

PM Right Ascension

32.83 mas/yr

PM Declination

31.06 mas/yr

Galactic Cartesian (pc)

x = 0.198 · y = 0.946 · z = -0.258

Equatorial (J2000)

RA 78.15056° · Dec -14.95098°

Galactic ℓ, b

215.897° · -28.494°

Ecliptic λ, β

75.456° · -37.794°

HTM-20 index

1667091168

Similar Worlds

HD 93083 b

Gas Giant · K-type orange

Radius 13.40 R⊕ · 93.0 ly

Kepler-48 e

Gas Giant · K-type orange

Radius 13.40 R⊕ · 1,000.4 ly

HD 47366 b

Gas Giant · K-type orange

Radius 13.40 R⊕ · 275.1 ly

HIP 114933 b

Gas Giant · K-type orange

Radius 13.40 R⊕ · 331.9 ly

HD 114783 c

Gas Giant · K-type orange

Radius 13.40 R⊕ · 68.7 ly

HD 4732 b

Gas Giant · K-type orange

Radius 13.40 R⊕ · 178.7 ly

Explore Related Categories

Gas Giant Planets Radial Velocity Discoveries Anglo-Australian Telescope Mission K-type orange Hosts