1998 ED21

1998ED21, 18646, 1987 DD3, 1987DD3, 1996 RS2, 1996RS2, J87D03D, J96R02S, J98E21D

All data for this body: [vot]

MPC data
Name (number) 1998 ED21 (18646)
a 2.36264
e 0.10514
i / sin(i) 8.8894 / 0.15453
q 2.11422
Q 2.61106
ω 296.5409
Node 157.2626
m 228.9925
n 0.2714
Epoch 2460800.5
nobs 3248
nopp 24
Years observed 1987-2025
rms 0.60
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.362
ep 0.129
sin(ip) 0.153
G 0.150
H 14.920
Mass
D 4.39 0.162
pV 0.084 0.0107
Value
Rotational Period
Period quality None
Spectral Class X
Spectral Class Score 5.779
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.3623 0.1294 0.1528 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
4.39 0.163 0.163 Masiero 2011ApJ...741...68M NEATM
4.39 1.300 1.300 Nugent 2016AJ....152...63N NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.084 0.0108 0.0108 Masiero 2011ApJ...741...68M NEATM
0.100 0.0700 0.0700 Nugent 2016AJ....152...63N 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
14.92 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
L DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
L X 0.2771 0.6400 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
X 0.30 Bus VIS Carvano 2010A&A...510A..43C PHOT
X X 0.8631 0.6400 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT