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 2.36260
e 0.10492
i / sin(i) 8.8894 / 0.15453
q 2.11472
Q 2.61049
ω 296.3394
Node 157.2803
m 66.3900
n 0.2714
Epoch 2460200.5
nobs 2914
nopp 22
Years observed 1987-2023
rms 0.52
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.362
ep 0.129
sin(ip) 0.153
Value Standard error
G 0.150
H 14.950
Mass
D 4.39 0.162
pV 0.084 0.0107
Rotational Period
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-Oct-2022
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
14.95 MPC-2023-12-04 MPC-2023-12-04 Phot