1999 UK9

1999UK9, 1990 EM9, 1990EM9, 36228, J90E09M, J99U09K

All data for this body: [vot]

MPC data
Name (number) 1999 UK9 (36228)
a 3.17915
e 0.12433
i / sin(i) 4.5133 / 0.07869
q 2.78389
Q 3.57440
ω 223.6920
Node 219.1066
m 155.4831
n 0.1739
Epoch 2460800.5
nobs 2118
nopp 23
Years observed 1987-2025
rms 0.73
Best values
[raw, vot]

Value Standard error
Parent Hygiea (10)
 
ap 3.168
ep 0.136
sin(ip) 0.092
G 0.150
H 13.840
Mass
D 9.41 0.047
pV 0.054 0.0115
Value
Rotational Period
Period quality None
Spectral Class B
Spectral Class Score 11.046
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
10 Hygiea 0 Hygiea Novakovic 2019EPSC...13.1671N HCM
10 Hygiea 601 Hygiea Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.1680 0.1357 0.0917 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
9.04 0.081 0.081 Masiero 2011ApJ...741...68M NEATM
9.60 nan nan Ali-Lagoa 2016A&A...591A..14A NEATM
9.60 nan nan Ali-Lagoa 2016A&A...591A..14A NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.054 0.0115 0.0115 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
13.84 MPC-2023-12-04 MPC-2023-12-04 Phot
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
B DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
B 0.620 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
B B 0.8877 0.4590 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
C 0.83 Bus VIS Carvano 2010A&A...510A..43C PHOT
C B 0.4980 0.4590 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT