1999 XM21

1999XM21, D0098, J99X21M

All data for this body: [vot]

MPC data
Name (number) 1999 XM21 (130098)
a 2.79838
e 0.19198
i / sin(i) 7.2825 / 0.12676
q 2.26116
Q 3.33561
ω 269.0568
Node 188.9606
m 130.4765
n 0.2105
Epoch 2460800.5
nobs 945
nopp 17
Years observed 1999-2025
rms 0.77
Best values
[raw, vot]

Value Standard error
Parent Dora (668)
 
ap 2.797
ep 0.195
sin(ip) 0.136
G 0.150
H 15.620
Mass
D 5.09 0.272
pV 0.052 0.0160
Value
Rotational Period
Period quality None
Spectral Class S
Spectral Class Score 5.826
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
668 Dora 0 Dora Novakovic 2019EPSC...13.1671N HCM
668 Dora 512 Dora Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.7969 0.1949 0.1356 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
5.09 0.272 0.272 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.052 0.0160 0.0160 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
15.62 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
S 0.971 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT