Space Codex / Exoplanet reference
Published exoplanet measurements
AU Mic d
AU Mic d orbits AU Mic once every 12.736 days. The system is about 31.7092 light-years from Earth.
Archive retrieved November 1, 2026 (America/New_York). The selected paper and archive update dates appear below.
The recorded orbit
The selected archive solution gives an orbital period of 12.736 days, or 0.0348692 Earth years. The listed eccentricity is 0.00305. The period measures a year on this planet. It does not establish the length of its rotation or the duration of daylight.
Read how orbital period, size, and eccentricity fit together.
Size and mass
No planetary radius is supplied in this selected solution. The profile leaves that gap visible rather than estimating a size from the mass. The mass parameter is 1.053 (+0.511 / −0.511) Earth masses. Its archive provenance is Mass.
The host star and received light
The host is cataloged as AU Mic. Its reported effective temperature is 3678 K. Its reported radius is 0.744 solar radii. Its reported mass is 0.51 solar masses. The available stellar and orbital entries do not establish a breathable atmosphere, surface water, or life.
What a habitable-zone claim does and does not mean · How a star changes over time.
Other planets around AU Mic
The fetched archive contains 3 selected default planet records for this host. This is the retrieved record set, and additional or revised discoveries may appear in later research.
| Planet | Period (days) | Radius (Earth) | Mass parameter (Earth) | Mass definition |
|---|---|---|---|---|
| AU Mic b | 8.46345 (+5e-06 / −5e-06) | 4.79 (+0.29 / −0.29) | 8.99 (+2.61 / −2.67) | Mass |
| AU Mic d | 12.736 (+0.00793 / −0.00793) | Not reported in this solution | 1.053 (+0.511 / −0.511) | Mass |
| AU Mic c | 18.859 (+2.2e-05 / −2.4e-05) | 2.79 (+0.18 / −0.17) | 14.46 (+3.24 / −3.42) | Mass |
Earth comparison
| Quantity | Reported value or conversion | Comparison |
|---|---|---|
| Orbital period | 12.736 days | 0.0348692 Earth years |
| System distance | 9.7221 parsecs | 31.7092 light-years |
| Mass parameter | 1.053 (+0.511 / −0.511) | Earth masses; check mass definition |
Conversions use rounded central values. They are navigation aids for the data, not additional observations. Uncertainties for the original parameters remain in the next table.
Measurement table
| Parameter | Value and reported uncertainty | Unit or definition |
|---|---|---|
| Orbital period | 12.736 (+0.00793 / −0.00793) | days |
| Semimajor axis | Not reported in this solution | AU |
| Radius | Not reported in this solution | Earth radii |
| Mass parameter | 1.053 (+0.511 / −0.511) | Earth masses |
| Orbital eccentricity | 0.00305 (+0.00104 / −0.00104) | dimensionless |
| Orbital inclination | 89.3181 (+1.158 / −1.158) | degrees |
| Equilibrium temperature | Not reported in this solution | K; model estimate |
| Incident flux | Not reported in this solution | Earth flux |
| Bulk density | Not reported in this solution | g/cm³ |
| Host effective temperature | 3678 (+90 / −88) | K |
| Host radius | 0.744 (+0.023 / −0.021) | solar radii |
| Host mass | 0.51 (+0.028 / −0.027) | solar masses |
| Host metallicity | 0.23 (+0.24 / −0.3) | dex; archive abundance definition |
| Host age | 0.0201 (+0.0025 / −0.0024) | billion years |
| Host luminosity | -1.0381 (+0.04925 / −0.04914) | log10 solar luminosity |
| Host surface gravity | 4.404 (+0.026 / −0.031) | log10 cm/s² |
| Host rotation period | Not reported in this solution | days |
| System distance | 9.7221 (+0.004625 / −0.004625) | parsecs |
Parentheses show the reported upper and lower uncertainties when both are supplied. Bounds are explicitly labeled. A missing entry means unavailable in this solution, not zero. The confidence convention belongs to the source paper.
Research record and limitations
| Record | Value |
|---|---|
| Planetary reference | Wittrock et al. 2023 |
| Discovery method | Transit Timing Variations |
| Discovery year | 2023 |
| Discovery facility | Multiple Observatories |
| Mass provenance | Mass |
| Host stars in system | 1 |
| Archive system planet count | 4 |
| Planetary solution publication date | 2023-12 |
| Row update date | 2024-10-03 |
| Archive release date | 2024-10-03 |
Source: NASA Exoplanet Archive overview for AU Mic d, Planetary Systems table, default solution. The collection excludes entries flagged controversial at retrieval. A selected default is a published reference choice, not a claim that every parameter is the latest estimate in all literature.
This profile documents measurements and their scope. It is separate from the 3D planet catalog and does not create a sponsorship placement or a new explorer destination.