1999AY21

16001, 1991SM5, J91S05M, J99A21Y

All data for this body: [vot]

MPC data
Name (number) 1999AY21 (16001)
Packed designation 16001
a 3.11803
e 0.09485
i / sin(i) 4.8355 / 0.08430
q 2.82229
Q 3.41376
ω 352.0817
Node 193.4116
m 25.4561
n 0.1790
Epoch 2459600.5
nobs 1254
nopp 20
Years observed 1991-2021
rms 0.72
Best values
[raw, vot]

Value Standard error
Parent Hygiea (10)
 
ap 3.121
ep 0.125
sin(ip) 0.088
Value Standard error
G 0.150
H 14.410
Mass
D 7.77 0.179
pV 0.067 0.0213
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
10 Hygiea 601 Hygiea Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.1211 0.1252 0.0877 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Jan-2022
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
7.77 0.179 0.179 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.067 0.0213 0.0213 Masiero 2011ApJ...741...68M NEATM
G data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.15 MPC-2022-01-18 MPC-2022-01-18 Phot
H data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
14.41 MPC-2022-01-18 MPC-2022-01-18 Phot