1997 WQ21

1997WQ21, 18571, 1988 NQ, 1988NQ, J88N00Q, J97W21Q

All data for this body: [vot]

MPC data
Name (number) 1997 WQ21 (18571)
a 2.47384
e 0.18235
i / sin(i) 12.1324 / 0.21017
q 2.02274
Q 2.92493
ω 12.7329
Node 275.2176
m 24.0778
n 0.2533
Epoch 2460200.5
nobs 2471
nopp 21
Years observed 1988-2023
rms 0.57
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.470
ep 0.184
sin(ip) 0.218
Value Standard error
G 0.150
H 13.730
Mass
D 10.21 0.105
pV 0.081 0.0078
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.4703 0.1839 0.2182 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Oct-2022
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
10.11 0.111 0.111 Masiero 2011ApJ...741...68M NEATM
10.41 2.856 2.856 Masiero 2017AJ....154..168M NEATM
11.11 2.220 2.220 Ali-Lagoa 2018A&A...612A..85A NEATM
11.37 0.340 0.340 Usui 2011PASJ...63.1117U NEATM
11.64 2.330 2.330 Ali-Lagoa 2018A&A...612A..85A NEATM
3.40 2.510 2.510 Nugent 2016AJ....152...63N NEATM
6.99 2.110 2.110 Nugent 2016AJ....152...63N NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.053 0.0210 0.0210 Ali-Lagoa 2018A&A...612A..85A NEATM
0.058 0.0230 0.0230 Ali-Lagoa 2018A&A...612A..85A NEATM
0.065 0.0453 0.0453 Masiero 2017AJ....154..168M NEATM
0.088 0.0094 0.0094 Masiero 2011ApJ...741...68M NEATM
0.110 0.0500 0.0500 Nugent 2016AJ....152...63N NEATM
0.530 0.1600 0.1600 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
13.73 MPC-2023-12-04 MPC-2023-12-04 Phot