Helena

00101, 1868PA, I68P00A

All data for this body: [vot]

MPC data
Name (number) Helena (101)
Packed designation 00101
a 2.58380
e 0.14119
i / sin(i) 10.1978 / 0.17705
q 2.21901
Q 2.94860
ω 348.3123
Node 343.3832
m 350.7352
n 0.2373
Epoch 2459600.5
nobs 2634
nopp 59
Years observed 1871-2021
rms 0.56
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.583
ep 0.110
sin(ip) 0.180
Value Standard error
G 0.150
H 8.230
Mass
D 61.64 0.564
pV 0.197 0.0059
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.5833 0.1101 0.1800 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Jan-2022
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
57.22 1.542 1.542 Ryan&Woodward 2010AJ....140..933R IRAS-STM
60.38 0.730 0.730 Usui 2011PASJ...63.1117U NEATM
61.22 6.120 6.120 Ali-Lagoa 2018A&A...612A..85A NEATM
65.84 1.300 1.300 Tedesco 2002AJ....123.1056T STM
66.89 6.690 6.690 Ali-Lagoa 2018A&A...612A..85A NEATM
67.22 2.950 2.950 Masiero 2012ApJ...759L...8M NEATM
72.39 3.267 3.267 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.157 0.0146 0.0146 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.182 0.0220 0.0220 Masiero 2012ApJ...759L...8M NEATM
0.190 0.0080 0.0080 Tedesco 2002AJ....123.1056T STM
0.207 0.0410 0.0410 Ali-Lagoa 2018A&A...612A..85A NEATM
0.247 0.0490 0.0490 Ali-Lagoa 2018A&A...612A..85A NEATM
0.252 0.0137 0.0137 Ryan&Woodward 2010AJ....140..933R IRAS-STM
G data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.15 MPC-2022-01-18 MPC-2022-01-18 Phot
H data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
8.23 MPC-2022-01-18 MPC-2022-01-18 Phot