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CONFIRMED EXOPLANET · Neptune-like

HD 35843 c

HD 35843 c orbits the star HD 35843, 227 light-years from Earth. It completes an orbit in 46.962 Earth days.

DISCOVERED 2025 · Transit

Get to know this world ↓
HD 35843 c
ORBITAL VISUALISATION
Neptune-likePlanet type

Size-based classification; composition may be uncertain.

2.54 × Earth’s radiusSize

Around 154% wider than Earth.

46.962 daysYear length

Time to complete one orbit.

227 light-yearsDistance

Its light travels for roughly 227 years to reach us.

2025Discovered

Transit

Overview

HD 35843 c is one of the confirmed worlds in the NASA Exoplanet Archive. Recorded as discovered in 2025. The credited discovery facility is Transiting Exoplanet Survey Satellite (TESS). Its Transit evidence gives us a way to study a planet that is usually too faint to see directly.

Its recorded radius is 2.54 times Earth's radius. Size is useful for comparison, but it cannot establish surface conditions by itself.

The planet

The archive lists a mass or minimum-mass value of 11.32 Earth masses (Mass). Radius: 2.54 Earth radii.

Mass and radius constrain possible interiors; multiple compositions can fit a given set of measurements.

Orbit & year

A year here lasts 46.962 Earth days. Its recorded semi-major axis is 0.25 AU. One AU is roughly the Earth–Sun distance.

Eccentricity: 0.153. Zero describes a circular orbit; increasing values describe more elongated ellipses.

Host star

HD 35843.

Effective temperature: 5,666 K.

Mass: 0.94 times the Sun’s mass.

Planetary system

2 confirmed planets are stored for this star.

HD 35843 b · 9.899-day orbit

HD 35843 c · 46.962-day orbit

Discovery

Reported discovery year: 2025. Method: Transit. Facility: Transiting Exoplanet Survey Satellite (TESS).

First stored in this atlas: 04/10/2026. This is an ingestion date, not a confirmation date.

How these methods work ↗

Potential habitability

The data here does not establish habitability, liquid water, or life. An appropriate atmosphere and many other conditions would be needed.

The listed equilibrium temperature is 479 K. This is an estimated energy-balance temperature, not a measured surface temperature.

Understand the habitable zone ↗

What do we actually know?

Observed

The underlying light, motion or timing signal. Usually not a photograph of the planet.

Measured

Parameters derived from observations, with instrument and model uncertainty.

Calculated

Our light-year conversion and browsing class are calculated from archive values.

Estimated

Equilibrium temperature is an energy-balance estimate, not surface weather.

Inferred

Possible composition depends on models and may not be unique.

Unknown

Surface conditions and the presence of life are not established here.

Measured signals are interpreted through models. The archive’s composite table combines published values and may include calculated estimates. Values do not necessarily form one self-consistent solution.

Radius and mass can be estimated or inferred, orbital period comes from recurring observations, and size classification is calculated by this site. Atmospheric and surface conditions remain unknown unless established by specific observations.

Consult the archive for individual parameter references and uncertainty intervals before scientific use.

Scientific data

Radius2.54 Earth radii
Mass / minimum mass11.32 Earth masses (Mass)
Orbital period46.9622 Earth days
Semi-major axis0.25 AU
Eccentricity0.153
Equilibrium temperature479 K · estimated, not surface temperature
Host star temperature5,666 K
Host star mass0.94 Solar masses
Host star radius0.897 Solar radii
Distance69.6026 parsecs
Discovery year2,025
Discovery methodTransit
Discovery facilityTransiting Exoplanet Survey Satellite (TESS)
Discovery publication2025-08

Uncertainties and parameter provenance

Archive uncertainty ranges and published references, where available. A missing uncertainty does not imply an exact value.

ParameterUncertainty / source
Radius+0.08 / -0.07Hesse et al. 2025
Mass / minimum mass+1.58 / -1.48Hesse et al. 2025
Orbital period+0.0002 / -0.0002Hesse et al. 2025
Equilibrium temperature+12 / -12Hesse et al. 2025

Sources

NASA Exoplanet Archive · Planetary Systems Composite Parameters (PSCompPars).

Open the scientific archive record ↗

Last changed in this atlas: 04/10/2026, 11:39:41. Read our methodology.

Spotted something wrong? Report an error ↗

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