1999 WH20

1999WH20, J99W20H, O3678

All data for this body: [vot]

MPC data
Name (number) 1999 WH20 (243678)
a 2.54472
e 0.16184
i / sin(i) 26.7847 / 0.45064
q 2.13288
Q 2.95655
ω 170.2164
Node 238.2694
m 102.7619
n 0.2428
Epoch 2460800.5
nobs 978
nopp 14
Years observed 1999-2025
rms 0.81
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.547
ep 0.183
sin(ip) 0.441
G 0.150
H 15.860
Mass
D 5.05 0.338
pV 0.037 0.0032
Value
Rotational Period
Period quality None
Spectral Class C
Spectral Class Score 5.040
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.5468 0.1827 0.4409 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
3.92 1.136 1.136 Masiero 2017AJ....154..168M NEATM
4.37 1.540 1.540 Masiero 2021PSJ.....2..162M NEATM
4.80 1.120 1.120 Nugent 2016AJ....152...63N NEATM
5.25 0.385 0.385 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.030 0.0200 0.0200 Nugent 2016AJ....152...63N NEATM
0.037 0.0033 0.0033 Masiero 2011ApJ...741...68M NEATM
0.044 0.0220 0.0420 Masiero 2021PSJ.....2..162M NEATM
0.055 0.0401 0.0401 Masiero 2017AJ....154..168M 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
15.86 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
C 0.840 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT