Io

00085, 1865 SA, 1865SA, 1899 LA, 1899LA, 1899 UA, 1899UA, I65S00A, I99L00A, I99U00A

All data for this body: [vot]

MPC data
Name (number) Io (85)
a 2.65337
e 0.19321
i / sin(i) 11.9604 / 0.20724
q 2.14072
Q 3.16603
ω 122.8936
Node 203.0430
m 2.6561
n 0.2280
Epoch 2460800.5
nobs 7488
nopp 74
Years observed 1865-2025
rms 0.55
Best values
[raw, vot]

Value Standard error
Parent Eunomia (15)
 
ap 2.654
ep 0.152
sin(ip) 0.219
G 0.150
H 7.940
Mass 4.509e+18 7.266e+17
D 156.22 1.316
pV 0.065 0.0022
Value
Rotational Period 6.870
Period quality 3
Spectral Class C
Spectral Class Score 68.190
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
15 Eunomia 0 Eunomia Novakovic 2019EPSC...13.1671N HCM
15 Eunomia 502 Eunomia 1.4700 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.6537 0.1516 0.2187 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Mass data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
1.4000e+18 6.3300e+18 6.3300e+18 Zielenbach 2011AJ....142..120Z Deflec
3.3200e+17 3.4500e+18 3.4500e+18 Zielenbach 2011AJ....142..120Z Deflec
3.4900e+18 2.6400e+18 2.6400e+18 Zielenbach 2011AJ....142..120Z Deflec
3.8700e+18 2.6800e+18 2.6800e+18 Zielenbach 2011AJ....142..120Z Deflec
4.3548e+18 1.6107e+18 1.6107e+18 Fienga 2013arXiv1301.1510F Ephem
5.0340e+18 9.9900e+17 9.9900e+17 Fienga 2020MNRAS.492..589F Ephem
6.2310e+18 Folkner 2014IPNPR.196C...1F Ephem
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
116.50 32.510 32.510 Nugent 2016AJ....152...63N NEATM
128.01 36.280 36.280 Masiero 2021PSJ.....2..162M NEATM
128.15 30.690 30.690 Nugent 2016AJ....152...63N NEATM
144.73 42.281 42.281 Masiero 2017AJ....154..168M NEATM
150.66 1.910 1.910 Usui 2011PASJ...63.1117U NEATM
151.00 nan nan Ali-Lagoa 2016A&A...591A..14A NEATM
151.57 38.840 38.840 Masiero 2017AJ....154..168M NEATM
151.95 15.190 15.190 Ali-Lagoa 2018A&A...612A..85A NEATM
152.00 15.000 15.000 Hanus 2013Icar..226.1045H AO/LC
154.79 3.800 3.800 Tedesco 2002AJ....123.1056T STM
155.24 5.089 5.089 Ryan&Woodward 2010AJ....140..933R IRAS-STM
163.00 15.000 15.000 Durech 2011Icar..214..652D OCCULT
163.00 18.648 18.648 Masiero 2011ApJ...741...68M NEATM
165.00 3.000 3.000 Hanus 2017A&A...601A.114H AO/OCCULT/LC
165.78 16.580 16.580 Ali-Lagoa 2018A&A...612A..85A NEATM
168.01 10.560 10.560 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
169.46 4.520 4.520 Masiero 2014ApJ...791..121M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.044 0.0224 0.0224 Masiero 2017AJ....154..168M NEATM
0.055 0.0110 0.0110 Ali-Lagoa 2018A&A...612A..85A NEATM
0.057 0.0072 0.0072 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.059 0.0337 0.0337 Masiero 2017AJ....154..168M NEATM
0.060 0.0100 0.0100 Masiero 2014ApJ...791..121M NEATM
0.063 0.0250 0.0250 Masiero 2011ApJ...741...68M NEATM
0.065 0.0130 0.0130 Ali-Lagoa 2018A&A...612A..85A NEATM
0.066 0.0043 0.0043 Ryan&Woodward 2010AJ....140..933R IRAS-STM
0.067 0.0030 0.0030 Tedesco 2002AJ....123.1056T STM
0.074 0.0290 0.0480 Masiero 2021PSJ.....2..162M NEATM
0.080 0.0500 0.0500 Nugent 2016AJ....152...63N NEATM
0.090 0.0700 0.0700 Nugent 2016AJ....152...63N NEATM
G data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.15 MPC-2023-12-94 MPC-2023-12-94 Phot
H data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
7.94 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
6.87 2 Synodic Behrend LCDB Lightcurve
6.8723 3 Synodic Behrend LCDB Lightcurve
6.8747 3 Synodic Behrend LCDB Lightcurve
6.87478 2 Sidereal Martikainen 2021A&A...649A..98M Model
6.874783 2 Sidereal Durech 2011Icar..214..652D Model
6.874783 2 Sidereal Hanus 2013Icar..226.1045H Model
6.874783 2 Sidereal Hanus 2017A&A...601A.114H Model
6.875 2+ Synodic Carbognani 2019P&SS..169...15C Lightcurve
6.875 3 Synodic Lagerkvist 1981A&AS...44..401L Lightcurve
6.87511 2 Sidereal Torppa 2003Icar..164..346T Model
6.875118 2 Sidereal Erikson 1999P&SS...47..327E Model
6.87563 2 Synodic Pal 2020ApJS..247...26P Lightcurve
6.878 2 Synodic Behrend LCDB Lightcurve
7.0 2 Synodic Yang LCDB Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
F Tholen VIS Fornasier 2014Icar..233..163F SPEC
B Bus VIS Bus 2002Icar..158..146B SPEC
B Bus VIS Fornasier 2014Icar..233..163F SPEC
B 1.000 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
C Bus-DeMeo NIR de Leon 2012Icar..218..196D SPEC
C Bus-DeMeo VISNIR DeMeo 2009Icar..202..160D SPEC
C Tholen VIS Lazzaro 1999Icar..142..445L SPEC
C Tholen VIS Lazzaro 2004Icar..172..179L SPEC
C Tholen VISNIR Nathues 2010Icar..208..252N SPEC+PHOT
C 0.920000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC
C P 0.550000 0.320000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC
Cb Bus VIS Lazzaro 2004Icar..172..179L SPEC
P 0.960000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC