1998 YK21

1998YK21, A1543, J98Y21K

All data for this body: [vot]

MPC data
Name (number) 1998 YK21 (101543)
a 3.21849
e 0.14565
i / sin(i) 1.0919 / 0.01906
q 2.74971
Q 3.68727
ω 252.8505
Node 138.6456
m 272.6445
n 0.1707
Epoch 2460800.5
nobs 560
nopp 18
Years observed 1998-2025
rms 0.92
Best values
[raw, vot]

Value Standard error
Parent Themis (24)
 
ap 3.201
ep 0.142
sin(ip) 0.014
G 0.150
H 15.680
Mass
D 4.58 0.450
pV 0.048 0.0118
Value
Rotational Period
Period quality None
Spectral Class D
Spectral Class Score 0.243
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
24 Themis 0 Themis Novakovic 2019EPSC...13.1671N HCM
24 Themis 602 Themis 0.2100 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.2007 0.1419 0.0138 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
4.58 0.450 0.450 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.048 0.0118 0.0118 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
15.68 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 D 0.0304 0.0250 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
D D 0.0405 0.0250 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT