Key parameters at a glance

A radius of 8.26 Earth radii
A mass of 51.79 Earth masses
Surface gravity around 0.76 g
An orbital period of 3.168 days
Semi-major axis 0.0479 AU
Distance from Earth 449.90 light-years
Earth Similarity Index 0.347
Travel time at Voyager 1 speed 7,933,979 years

2 siblings around DMPP-2

DMPP-2 c shares its host star with 2 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
DMPP-2 c this	Neptune-like	8.26	51.79	3.168	—	2026
DMPP-2 b	Gas Giant	14.20	171.48	5.203	1,000	2019
DMPP-2 d	Gas Giant	11.60	91.79	16.491	—	2026

DMPP-2 c Planet Profile

Physical Specs

Radius

8.26 R⊕

Radius (Jupiter)

0.737 R♃

Mass

51.79 M⊕

Mass (Jupiter)

0.163 M♃

Density

0.51 g/cm³

Surface Gravity

0.76 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.347

HZ Position Unknown

Controversial No

Discovery

Year 2026

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#139of 574

top 24.0%

This planet

8.26R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

HD 27894 c 8.24 R⊕ Kepler-9 b 8.29 R⊕ TOI-3629 b 8.29 R⊕

Metric	Earth	DMPP-2 c	Jupiter
Radius (R⊕)	1.00	8.26	11.21
Mass (M⊕)	1.00	51.79	317.83
Density (g/cm³)	5.51	0.51	1.33
Surface Gravity (g)	1.00	0.76	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	51.790 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 11231

HIP

HIP 8501

TIC

TIC 32432767

Gaia DR2

Gaia DR2 5017319806652067072

Gaia DR3

Gaia DR3 5017319806652067072

System

DMPP-2

Percentile among Neptune-like cohort

Radius 8.260 R⊕ · percentile 76 / cohort 574

Mass 51.790 M⊕ · percentile 72 / cohort 574

Orbital period 3.17 d · percentile 5 / cohort 524

Distance 137.94 pc · percentile 31 / cohort 572

ESI 0.347 · percentile 62 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

3.168 days

Semi-major axis

0.0479 AU

Eccentricity

0.280

Inclination

— °

Year Length

A year here lasts approximately 3.17 Earth days (0.9% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0479 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.347

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Standing et al. 2026

Instrument

Multiple Instruments

Publication

2026-02

Observation locale

Ground

Discovery cohort

Planets confirmed in 2026 at Multiple Observatories (12 shown).

DMPP-6 b · Sub-Neptune TOI-4336 A c · Super-Earth GJ 887 d · Sub-Neptune HD 176986 d · Sub-Neptune GJ 887 e · Rocky Terrestrial DMPP-6 c · Sub-Neptune DMPP-9 b · Sub-Neptune TOI-5789 d · Super-Earth TOI-5789 e · Sub-Neptune HD 85426 c · Sub-Neptune DMPP-7 b · Neptune-like TOI-375 d · Gas Giant

Host System: DMPP-2

Spectral Class

F-type yellow-white

Effective Temperature

6,500 K — hotter than the Sun (5,778 K)

Estimated Age

2.00 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.780 R☉

Stellar Mass

1.410 M☉

Metallicity [Fe/H]

—

Extended Stellar Properties

Surface gravity (log g)

4.100 dex

Stellar density

0.244 g/cm³

Systemic radial velocity

7.54 km/s

Rotational v·sin i

5.10 km/s

Distance

137.94 parsec

Light-years 449.90 ly

V-band magnitude

8.57 mag

Voyager-speed travel 7,933,979 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

7.221 mas

Total Proper Motion

28.417 mas/yr

PM Right Ascension

-27.38 mas/yr

PM Declination

7.61 mas/yr

Galactic Cartesian (pc)

x = 0.732 · y = 0.380 · z = -0.566

Equatorial (J2000)

RA 27.40773° · Dec -34.45910°

Galactic ℓ, b

246.923° · -75.534°

Ecliptic λ, β

9.547° · -42.075°

HTM-20 index

1639271914