Ilmatar

00385, 1894 EA, 1894EA, 1918 CC, 1918CC, 1942 FQ, 1942FQ, 1953 TQ, 1953TQ, 1987 QG3, 1987QG3, I94E00A, J18C00C, J42F00Q, J53T00Q, J87Q03G

All data for this body: [vot]

MPC data
Name (number) Ilmatar (385)
a 2.84693
e 0.12632
i / sin(i) 13.5823 / 0.23484
q 2.48731
Q 3.20655
ω 189.1384
Node 344.8561
m 338.0356
n 0.2052
Epoch 2460200.5
nobs 8303
nopp 66
Years observed 1894-2023
rms 0.39
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.847
ep 0.185
sin(ip) 0.237
Value Standard error
G 0.150
H 7.860
Mass 8.905e+17 3.642e+17
D 85.80 0.424
pV 0.211 0.0061
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.8467 0.1849 0.2375 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Oct-2022
Mass data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
1.0390e+18 5.1500e+17 5.1500e+17 Fienga 2020MNRAS.492..589F Ephem
7.4200e+17 Folkner 2014IPNPR.196C...1F Ephem
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
68.13 6.810 6.810 Ali-Lagoa 2018A&A...612A..85A NEATM
69.00 nan nan Marchis 2006Icar..185...39M AO
80.87 8.090 8.090 Ali-Lagoa 2018A&A...612A..85A NEATM
83.69 0.750 0.750 Usui 2011PASJ...63.1117U NEATM
85.84 0.580 0.580 Masiero 2014ApJ...791..121M NEATM
91.53 1.600 1.600 Tedesco 2002AJ....123.1056T STM
93.41 2.882 2.882 Ryan&Woodward 2010AJ....140..933R IRAS-STM
94.45 2.560 2.560 Masiero 2011ApJ...741...68M NEATM
96.69 5.079 5.079 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
96.80 9.680 9.680 Ali-Lagoa 2018A&A...612A..85A NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.187 0.0370 0.0370 Ali-Lagoa 2018A&A...612A..85A NEATM
0.196 0.0207 0.0207 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.200 0.0327 0.0327 Masiero 2011ApJ...741...68M NEATM
0.206 0.0130 0.0130 Ryan&Woodward 2010AJ....140..933R IRAS-STM
0.213 0.0080 0.0080 Tedesco 2002AJ....123.1056T STM
0.240 0.0400 0.0400 Masiero 2014ApJ...791..121M NEATM
0.268 0.0540 0.0540 Ali-Lagoa 2018A&A...612A..85A NEATM
0.377 0.0750 0.0750 Ali-Lagoa 2018A&A...612A..85A 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
7.86 MPC-2023-12-04 MPC-2023-12-04 Phot