1999 XR18

1999XR18, 25461, J99X18R

All data for this body: [vot]

MPC data
Name (number) 1999 XR18 (25461)
a 2.58127
e 0.10226
i / sin(i) 16.3219 / 0.28103
q 2.31730
Q 2.84523
ω 331.6636
Node 36.6804
m 68.2286
n 0.2377
Epoch 2460800.5
nobs 3804
nopp 22
Years observed 1991-2025
rms 0.63
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.580
ep 0.066
sin(ip) 0.270
G 0.150
H 13.710
Mass
D 4.81 0.089
pV 0.258 0.0242
Value
Rotational Period
Period quality None
Spectral Class None
Spectral Class Score
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.5801 0.0660 0.2698 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
4.78 0.094 0.094 Masiero 2011ApJ...741...68M NEATM
5.05 0.279 0.279 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.251 0.0277 0.0277 Masiero 2011ApJ...741...68M NEATM
0.281 0.0499 0.0499 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
13.71 MPC-2023-12-04 MPC-2023-12-04 Phot