1999 JA81

1999JA81, 1997 YU18, 1997YU18, 35889, J97Y18U, J99J81A

All data for this body: [vot]

MPC data
Name (number) 1999 JA81 (35889)
a 2.61437
e 0.13567
i / sin(i) 14.3132 / 0.24722
q 2.25968
Q 2.96905
ω 135.5549
Node 107.2496
m 53.5555
n 0.2332
Epoch 2460800.5
nobs 1930
nopp 22
Years observed 1997-2025
rms 0.74
Best values
[raw, vot]

Value Standard error
Parent Eunomia (15)
 
ap 2.615
ep 0.157
sin(ip) 0.230
G 0.150
H 14.610
Mass
D 3.75 0.701
pV 0.239 0.0473
Value
Rotational Period
Period quality None
Spectral Class None
Spectral Class Score
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
15 Eunomia 0 Eunomia Novakovic 2019EPSC...13.1671N HCM
15 Eunomia 502 Eunomia -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
2.6150 0.1566 0.2296 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
3.75 0.701 0.701 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.239 0.0473 0.0473 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
14.61 MPC-2023-12-04 MPC-2023-12-04 Phot