Registry · exoplanet

AU Mic e

Exoplanet

harvesting The full record is being pulled from the archives right now — measurement tables, the Gaia row, catalogue photometry. This page will fill itself in.

Right ascension: 20h 45m 09.87s
Declination: −31° 20′ 32.8″
Galactic l, b: 12.653, -36.8
Magnitude V: 8.81
Distance: 9.7221 pc

Planet

NASA Exoplanet Archive, composite parameters

Host star	AU Mic · M1 V
Discovery	Radial Velocity, 2025 · Mauna Kea Observatory
Orbital period	33.11 d
Semi-major axis	— au
Eccentricity	—
Radius	4.87 R⊕ · 0.434 R♃
Mass	21.1 M⊕ · 0.06639 M♃
Density	1 g/cm³
Equilibrium temperature	— K
System distance	9.7221 pc

Published measurements

2 quantities measured more than once

One object can carry a dozen published estimates of the same quantity. The register keeps them side by side rather than picking a winner — the citation is part of the value.

Mass 2 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
21.1	M_earth	± 5.4	Radial Velocity	NASA Exoplanet Archive	Donati et al. 2025	2025
35.2	M_earth	± 6.7	Radial Velocity	NASA Exoplanet Archive	Donati et al. 2023	2023

Orbital period 2 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
33.11	d	± 0.06	Radial Velocity	NASA Exoplanet Archive	Donati et al. 2025	2025
33.39	d	± 0.1	Radial Velocity	NASA Exoplanet Archive	Donati et al. 2023	2023

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
AU Mic c	Exoplanet	0″	8.81
AU Mic d	Exoplanet	0″	8.81
AU Mic	Star	0″	—
AU Mic b	Exoplanet	0″	8.81
HD 197481c	Planet	7.083″	—
HD 197481b	Planet	7.083″	—
HD 197481d	Planet Candidate	7.083″	—
HD 197481	BYDraV*	7.083″	8.627
UCAC4 294-224020	HighPM*	433.3″	13.02

Provenance

where this card came from

Archive	Read at (UTC)	Record
Seeded from the bulk archive load; no per-object fetch yet.

Machine-readable: /api/v1/object/au-mic-e · Registry entry updated 2026-08-14.