Key parameters at a glance

A radius of 13.20 Earth radii
A mass of 845.42 Earth masses
Surface gravity around 4.85 g
An orbital period of 735.740 days
Semi-major axis 1.6000 AU
Distance from Earth 109.13 light-years
Earth Similarity Index 0.388
Travel time at Voyager 1 speed 1,924,487 years

1 sibling around HD 23079

HD 23079 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
HD 23079 c	Sub-Neptune	2.80	8.26	5.749	—	2025
HD 23079 b this	Gas Giant	13.20	845.42	735.740	—	2001

HD 23079 b Planet Profile

Physical Specs

Radius

13.20 R⊕

Radius (Jupiter)

1.180 R♃

Mass

845.42 M⊕

Mass (Jupiter)

2.660 M♃

Density

2.02 g/cm³

Surface Gravity

4.85 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.388

HZ Position Unknown

Controversial No

Discovery

Year 2001

Method Radial Velocity

Facility Anglo-Australian Telescope

Telescope 3.9 m Anglo-Australian Telescope

Size rank in cohort

Rank by radius

#847of 1771

top 47.8%

This planet

13.20R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 12661 c 13.20 R⊕ HD 37605 b 13.20 R⊕ MOA-2009-BLG-387L b 13.20 R⊕

Metric	Earth	HD 23079 b	Jupiter
Radius (R⊕)	1.00	13.20	11.21
Mass (M⊕)	1.00	845.42	317.83
Density (g/cm³)	5.51	2.02	1.33
Surface Gravity (g)	1.00	4.85	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	845.424 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 23079

HIP

HIP 17096

TIC

TIC 206402844

Gaia DR2

Gaia DR2 4733035238430992768

Gaia DR3

Gaia DR3 4733035238430992768

System

HD 23079

Percentile among Gas Giant cohort

Radius 13.200 R⊕ · percentile 49 / cohort 1771

Mass 845.424 M⊕ · percentile 63 / cohort 1747

Orbital period 735.74 d · percentile 73 / cohort 1533

Distance 33.46 pc · percentile 9 / cohort 1759

ESI 0.388 · percentile 82 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

735.740 days

Semi-major axis

1.6000 AU

Eccentricity

0.073

Inclination

— °

Year Length

A year here lasts about 2.01 Earth years on a nearly circular orbit at a mean orbital distance of 1.6000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.388

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Tinney et al. 2002

Instrument

UCLES Spectrograph

Publication

2002-05

Observation locale

Ground

Discovery cohort

Planets confirmed in 2001 at Anglo-Australian Telescope (2 shown).

HD 142 b · Gas Giant HD 39091 b · Gas Giant

Host System: HD 23079

Spectral Class

F-type yellow-white

Effective Temperature

5,994 K — hotter than the Sun (5,778 K)

Estimated Age

2.60 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.080 R☉

Stellar Mass

1.160 M☉

Metallicity [Fe/H]

-0.13

Extended Stellar Properties

Surface gravity (log g)

4.370 dex

Stellar density

1.224 g/cm³

Systemic radial velocity

0.57 km/s

Rotational v·sin i

2.99 km/s

Rotation period

15.00 days

Activity index (log R'HK)

-4.929

Metallicity ratio

[Fe/H]

Distance

33.46 parsec

Light-years 109.13 ly

V-band magnitude

7.12 mag

Voyager-speed travel 1,924,487 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

29.858 mas

Total Proper Motion

213.739 mas/yr

PM Right Ascension

-192.88 mas/yr

PM Declination

-92.10 mas/yr

Galactic Cartesian (pc)

x = 0.346 · y = 0.494 · z = -0.798

Equatorial (J2000)

RA 54.92819° · Dec -52.91623°

Galactic ℓ, b

264.320° · -49.653°

Ecliptic λ, β

21.348° · -68.160°

HTM-20 index

2034377870

Observation Record

Photometric series

RV measurements

Archive notes