1999 UM20

1999UM20, 1999 UK56, 1999UK56, F9429, J99U20M, J99U56K

All data for this body: [vot]

MPC data
Name (number) 1999 UM20 (159429)
a 2.79938
e 0.06366
i / sin(i) 1.7688 / 0.03087
q 2.62117
Q 2.97758
ω 311.4595
Node 101.5584
m 131.2030
n 0.2104
Epoch 2460800.5
nobs 654
nopp 19
Years observed 1999-2025
rms 0.88
Best values
[raw, vot]

Value Standard error
Parent Astrid (1128)
 
ap 2.800
ep 0.048
sin(ip) 0.011
G 0.150
H 15.990
Mass
D 3.34 0.305
pV 0.069 0.0194
Value
Rotational Period
Period quality None
Spectral Class None
Spectral Class Score
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
1128 Astrid 0 Astrid Novakovic 2019EPSC...13.1671N HCM
1128 Astrid 515 Astrid 0.7100 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.8001 0.0477 0.0114 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
3.34 0.305 0.305 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.069 0.0194 0.0194 Masiero 2011ApJ...741...68M 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
15.99 MPC-2023-12-04 MPC-2023-12-04 Phot