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AU Mic Overview

AU Mic 0.75 R⦿ 3700.00 K
AU Mic b
0.427 RJup
AU Mic d
AU Mic c
0.249 RJup
!
AU Mic e

AU Mic Architecture & Discovery Information

Name Orbital Separation Planet Size Method Year Reference Disposition
AU Mic
AU Mic b 8.46 d 4.79 R⨁ Transit 2020 Plavchan et al. 2020 Confirmed Planet
AU Mic d 12.74 d 1.05 M⨁ Transit Timing Variations 2023 Wittrock et al. 2023 Confirmed Planet
AU Mic c 18.86 d 2.79 R⨁ Transit 2021 Martioli et al. 2021 Confirmed Planet
AU Mic e 33.11 d 21.1 M⨁ Radial Velocity 2025 Donati et al. 2025 Confirmed Planet
AU Mic
  • Some stellar parameter values may be biased due to companion blend (WDS Catalog)
AU Mic c
  • Planet mass, planet density, and RV semi-amplitude value/uncertainties estimated from range given in ref. (Martioli et al. 2021)
AU Mic e
RA
20h45m09.87s
Dec
-31d20m32.82s
Distance
9.722100±0.004625 pc
Parallax
102.8290000±0.0485613 mas
Ecliptic Latitude
-12.82465 deg
Ecliptic Longitude
305.30682 deg
Galactic Latitude
-36.80401 deg
Galactic Longitude
12.65304 deg
Total Proper Motion
456.8630854±0.0628010 mas/yr
Proper Motion (RA)
281.4240000±0.0750541 mas/yr
Proper Motion (Dec)
-359.8950000±0.0539548 mas/yr
Photometry
mV
8.81±0.10
mTESS
6.755±0.032
mJ
5.436±0.017
mH
4.831±0.016
mKs
4.529±0.020
mW1
---
mW2
---
mW3
---
mW4
---
mIc
---
mGaia
7.840380±0.000731
mB
10.209±0.036
Abundances
(Hypatia Catalog)
[Fe/H] 0.05±0.04 dex
[Mg/H] -0.06±0.07 dex
[Si/H] -0.05±0.05 dex
Tools
Planetary Systems
ExoFOP Target Overview Page
IRSA Finding Chart
TOI
Stellar Hosts
Source Mallorquín et al. 2024 Wittrock et al. 2023 Donati et al. 2023 Zicher et al. 2022 Gilbert et al. 2022 Cale et al. 2021 Szabó et al. 2021 Martioli et al. 2021 Klein et al. 2021 Hirano et al. 2020 Plavchan et al. 2020 TICv8 Gaia DR2 Turnbull 2015 Pizzolato et al. 2003 Hawley et al. 1996 Michigan Catalog, Vol. 3 Cannon & Pickering 1918 ExoFOP
Teff
(K)
3540+120-110
3678+90-88
 3665±31 3700±100 --- --- --- 3700±100 3700±100 --- 3700±100 ---
3992.3599+149.7026-166.3396
 3753 --- --- --- --- 3588±87
Age
(Gyr)
0.019+0.010-0.006
0.0201+0.0025-0.0024
 0.0185±0.0024 0.022±0.003 --- --- --- 0.022±0.003 0.022±0.003 --- 0.022±0.003 --- --- --- --- --- --- --- ---
M✶
(M⦿)
0.635+0.040-0.070
0.510+0.028-0.027
 0.60±0.04 0.50±0.03 --- 0.50±0.03 0.56±0.06 0.50±0.03 0.50±0.03 --- 0.50±0.03 0.6620740±0.0204762 --- 0.54 --- --- --- --- ---
R✶
(R⦿)
0.862±0.052
0.744+0.023-0.021
 0.82±0.02 0.75±0.03
0.750+0.029-0.030
 --- 0.75±0.03 0.75±0.03 0.75±0.03 --- 0.75±0.03 0.6980090±0.0210957
0.61359823+0.05451321-0.04355186
 0.70 --- --- --- --- 0.6980090±0.0210957
Prot
(days)
4.86±0.01 --- 4.856±0.003 4.86±0.01 4.85±0.03 --- 4.8367±0.0006 4.863±0.010 4.86±0.01 --- 4.863±0.010 --- --- --- 4.85 --- --- --- ---
L✶
(log10(L⦿))
-0.9776+0.0057-0.0058
-1.038+0.049-0.049
 -0.99±0.01
-1.0+0.1-0.1
 --- --- --- ---
-1.0+0.1-0.1
 --- -1 ---
-1.0646184+0.0004074-0.0004078
-1.046 +0.368-0.477
--- --- --- --- ---
v sin i
(km/s)
9.2±0.2 --- 8.5±0.2 7.8±0.3 --- --- --- --- 7.8±0.3
9.230+0.790-0.310
 8.7±0.2 --- --- --- --- --- --- --- ---
log g
(log10(cm/s2))
4.37+0.08-0.10
4.404+0.026-0.031
 4.52±0.05 4.39±0.03 --- --- --- --- 4.39±0.03 --- --- 4.5712500±0.0128232 --- --- --- --- --- --- 4.6019800±0.0633204
Sp. T
M1 V --- --- --- --- --- --- --- M1 --- --- --- --- M1VE --- M0.0 M1 VE K5 ---
ρ✶
(g/cm3)
---
1.75+0.14-0.16
 --- ---
1.67+0.38-0.34
 --- --- --- --- --- --- 2.7446639±0.1642603 --- --- --- --- --- --- ---
γ
(km/s)
--- --- --- --- --- --- --- --- --- --- --- --- -6.3103105566262805±0.2868232871415796 --- --- --- --- --- ---
Metallicity
(dex)
0.01±0.06 [Fe/H]
0.23+0.24-0.30
[Fe/H] 		0.12±0.10 [M/H] --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
Print
Status
Confirmed Planet
Detected By
Radial Velocity, Transit, Transit Timing Variations
Tools
Planetary Systems
Transit Prediction Service
TOI
Transit
NExoList: JWST
Atmospheric Spectroscopy
Source Mallorquín et al. 2024 Donati et al. 2025 Wittrock et al. 2023 Donati et al. 2023 Zicher et al. 2022 Gilbert et al. 2022 Szabó et al. 2022 Cale et al. 2021 Szabó et al. 2021 Martioli et al. 2021 Klein et al. 2021 Hirano et al. 2020 Plavchan et al. 2020 ExoFOP
a/R✶
17.51+1.12-1.24
 ---
18.79+0.50-0.59
 --- ---
18.5+1.3-1.4
 18.95±0.35 ---
19.10+0.13-0.18
 19.1±0.3 ---
19.34+0.45-0.59
19.1+1.8-1.6
 ---
b
0.502+0.044-0.048
 ---
0.134+0.096-0.089
 --- ---
0.26+0.13-0.17
 0.17±0.11 --- 0.0±0.1 0.18±0.11 ---
0.18+0.07-0.03
0.16+0.14-0.11
 ---
ω
(deg)
-52.00+43.00-92.80
 --- 88.43038±0.05783 ---
179+128-125
-20+140-130
 --- 88.528±0.218 --- --- --- --- --- ---
e
0.070+0.090-0.040
 --- 0.00577±0.00101 ---
0.040+0.045-0.025
0.12+0.16-0.08
 ---
0.186+0.036-0.035
 --- 0 --- 0
0.10+0.17-0.09
 ---
i
(deg)
88.39+0.20-0.23
 --- 89.57917±0.37639 --- ---
89.18+0.53-0.45
 --- --- --- 89.5±0.3 89.5±0.4 --- --- ---
P
(days)
8.463446±0.000005 8.463446 8.46308±0.00006 8.4631427 8.463000±0.000002
8.4630004+0.0000058-0.0000060
 --- 8.4629991 8.462995±0.000003 8.463000±0.000002 8.46321 8.46321 8.46321±0.00004 8.453677658218298
Rp
(R⨁)
4.79±0.29 --- 3.96±0.15 --- ---
4.19+0.24-0.22
 3.55±0.13 --- 4.38±0.05 4.07±0.17 --- --- 4.20±0.20 4.026925832805621±0.211890680000000
Rp
(RJup)
0.427±0.026 --- 0.353±0.013 --- ---
0.374+0.021-0.020
 0.317±0.012 --- 0.391±0.004 0.363±0.015 --- --- 0.375±0.018 0.3592588782676396±0.0189036528540013
Rp/R✶
0.0499±0.0004 --- 0.0488±0.0010 --- --- 0.0512±0.0020 0.0433±0.0017 --- 0.0534±0.0006 0.0496±0.0007 --- 0.0514 0.0514±0.0013 ---
a
(au)
0.070+0.006-0.007
 --- 0.0649±0.0012 --- ---
0.0644+0.0056-0.0054
 0.0654±0.0012 0.0645±0.0013 0.0704±0.0006 0.0645±0.0013 --- ---
0.066+0.007-0.006
 ---
T14
(hours)
3.24+0.23-0.21
 ---
3.4927+0.0074-0.0067
 --- ---
3.56+0.60-0.46
 3.51±0.03 --- 3.51±0.10 3.50±0.08 --- ---
3.50+0.63-0.59
 3.573800574459999±0.069821164000000
TC
(days)
2458330.350878+0.000535-0.000503
(BJD)
2458330.350825
(BJD)
2458525.04109+0.00052-0.00051
(BJD-TDB)
2458330.38416
(BJD)
2458330.39051±0.00015
(BJD-TDB)
2458330.39080+0.00058-0.00057
(BJD)
--- 2458330.39046
(BJD)
2459041.28272±0.00033
(BJD)
2458330.39051±0.00015
(BJD)
--- 2458651.99275±0.00061
(BJD)
2458330.39153+0.00070-0.00068
(BJD)
2459041.28174600±0.00095672
(BJD)
Mp
(M⨁)
8.990+2.610-2.670
6.1+2.5-1.8
 ---
10.2+3.9-2.7
 11.7±5.0 --- ---
20.12+1.57-1.72
 --- 17±5
17.1+4.7-4.5
 --- --- ---
Mp
(MJup)
0.02829+0.00821-0.00840
0.019+0.008-0.006
 ---
0.0321+0.0123-0.0085
 0.0368±0.0157 --- ---
0.06330+0.00494-0.00541
 --- 0.053±0.016
0.0538+0.0148-0.0142
 --- --- ---
ρ
(g/cm3)
0.49±0.16 --- --- --- 0.97±0.43 --- ---
1.32+0.19-0.20
 --- 1.4±0.4 1.3±0.4 --- <4.4 ---
K
(m/s)
3.800+1.093-1.095
2.7+1.1-0.8
 ---
4.5+1.7-1.2
 5.8±2.5 --- ---
10.23+0.88-0.91
 ---
8.50+2.30-2.20
8.50+2.30-2.20
 --- <28 ---
Teq
(K)
554.8+31.6-32.0
 ---
600+17-16
 --- --- --- --- --- --- 593±21 --- --- --- 754.6240935447958
S
(S⨁)
--- ---
21.2+2.5-2.4
 --- --- --- --- --- --- --- --- --- --- 76.63791316516927
δ
(%)
0.249±0.004 ---
0.2379+0.0100-0.0099
 --- --- --- --- --- --- --- --- --- --- 0.287228875253504±0.021704503000000
λ
(deg)
--- --- --- --- --- --- --- --- --- --- ---
-4.70+6.80-6.40
 --- ---
Tp
(days)
--- ---
2458322.77+0.83-2.30
(BJD-TDB)
--- --- --- --- --- --- --- --- --- --- ---
Mp sin i
(M⨁)
--- --- --- --- --- --- --- --- --- --- --- --- <57 ---
Mp sin i
(MJup)
--- --- --- --- --- --- --- --- --- --- --- --- <0.18 ---
Print
Status
Confirmed Planet
Detected By
Tools
Planetary Systems
Source Wittrock et al. 2023
ω
(deg)
160.78945±2.59947
Mp
(M⨁)
1.053±0.511
Mp
(MJup)
0.00331±0.00161
e
0.00305±0.00104
i
(deg)
89.31812±1.15800
P
(days)
12.73596±0.00793
Print
Status
Confirmed Planet
Detected By
Radial Velocity, Transit, Transit Timing Variations
Tools
Planetary Systems
Transit Prediction Service
Transit
Source Mallorquín et al. 2024 Donati et al. 2025 Wittrock et al. 2023 Donati et al. 2023 Zicher et al. 2022 Gilbert et al. 2022 Szabó et al. 2022 Cale et al. 2021 Martioli et al. 2021
a/R✶
29.87+1.91-2.11
 ---
32.05+0.86-1.00
 --- ---
31.7+2.6-2.7
 28.8±2.4 --- 29±3
b
0.259+0.203-0.178
 ---
0.30+0.13-0.19
 --- ---
0.30+0.21-0.20
 0.58±0.13 --- 0.51±0.21
ω
(deg)
72.80+60.70-49.00
 --- 223.28438±1.68357 ---
153+124-94
-20+140-130
 --- --- ---
e
0.18+0.08-0.07
 --- 0.00338±0.00164 ---
0.041+0.047-0.026
0.13+0.16-0.09
 --- --- 0
i
(deg)
89.46+0.43-0.38
 --- 89.22655±0.21654 --- ---
89.39+0.40-0.38
 --- ---
89.0+0.5-0.4
P
(days)
18.859023+0.000022-0.000024
 18.859018 18.85969±0.00008 18.85882 18.8590190±0.0000016
18.858982+0.000053-0.000050
 --- 18.858991 18.859019±0.000016
Rp
(R⨁)
2.79+0.18-0.17
 --- 2.52±0.25 --- ---
2.79+0.31-0.30
 2.56±0.12 --- 3.24±0.16
Rp
(RJup)
0.249+0.016-0.015
 --- 0.225±0.022 --- ---
0.249+0.028-0.027
 0.228±0.011 --- 0.289±0.014
Rp/R✶
0.0291+0.0005-0.0003
 --- 0.0311±0.0028 --- ---
0.0340+0.0034-0.0033
 0.0313±0.0016 --- 0.0395±0.0011
a
(au)
0.119±0.011 --- 0.1108±0.0020 --- --- 0.110±0.010 0.09930±0.00850 0.1101±0.0020 0.1101±0.0022
T14
(hours)
4.29+0.30-0.27
 --- 4.236±0.029 --- ---
4.42+0.92-0.67
 4.29±0.30 --- 4.5±0.8
TC
(days)
2458342.223325+0.001085-0.001105
(BJD)
2458342.223487
(BJD)
2458342.2240+0.0019-0.0018
(BJD-TDB)
2459454.8973
(BJD)
2458342.22231±0.00050
(BJD-TDB)
2458342.2239+0.0017-0.0019
(BJD)
--- 2458342.2243
(BJD)
2458342.2223±0.0005
(BJD)
Mp
(M⨁)
14.46+3.24-3.42
11.6+3.3-2.7
 ---
14.2+4.8-3.5
 22.2±6.7 --- ---
9.600+2.070-2.310
 13.6±11.4
Mp
(MJup)
0.04550+0.01019-0.01076
0.0365+0.0104-0.0085
 ---
0.0447+0.0151-0.0110
 0.0698±0.0211 --- ---
0.03020+0.00651-0.00727
 0.0428±0.0359
ρ
(g/cm3)
3.90+1.14-1.17
 --- --- --- 3.66±1.28 --- ---
1.22+0.26-0.29
2.3+1.8-1.9
K
(m/s)
4.696+1.031-1.054
3.9+1.1-0.9
 ---
4.8+1.6-1.2
 8.5±2.5 --- ---
3.68+0.87-0.86
5.2+4.3-4.4
Teq
(K)
424.7+24.2-24.5
 ---
459+13-12
 --- --- --- --- --- 454±16
δ
(%)
0.085+0.003-0.002
 ---
0.0970+0.0180-0.0170
 --- --- --- --- --- ---
Tp
(days)
--- ---
2458324.0+2.9-3.7
(BJD-TDB)
--- --- --- --- --- ---
S
(S⨁)
--- ---
7.3+0.9-0.8
 --- --- --- --- --- ---
Print
Status
Confirmed Planet
Controversial
Detected By
Radial Velocity
Tools
Planetary Systems
Source Donati et al. 2025 Donati et al. 2023
Mp sin i
(M⨁)
---
35.2+6.7-5.4
Mp sin i
(MJup)
---
0.111+0.021-0.017
P
(days)
33.11±0.06 33.39±0.10
K
(m/s)
5.9+1.5-1.2
11.1+2.1-1.7
TC
(days)
2459118.5±1.4
(BJD)
2459118.5±1.4
(BJD)
Mp
(M⨁)
21.1+5.4-4.3
 ---
Mp
(MJup)
0.0664+0.0170-0.0135
 ---
Print
Literature Stellar Spectra (1 File)
File Type Spectrum Type Wavelength Category Reference
Spectra     echelle grating Optical California Planet Search
Literature Time Series (1 File Type, 1 File)
File Type Data Points Filter Reference
Photometric Light Curve     80 Hp (Hipparcos) Hipparcos and Tycho Catalogs
Known Objects
4 Confirmed Planets
3 2MASS Point Source Catalog
Data Files
1 SuperWASP Time Series
4 Associated Literature Data
  • System
  • Star
  • Confirmed
  • Candidate
  • False Positive Planet
  • Controversial
  • False Positive
  • Aliases
  • Data Access
  • Transit Prediction Service
  • Time Series
  • Kepler | K2
  • External Link
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