1997AM21

18552, J97A21M

All data for this body: [vot]

MPC data
Name (number) 1997AM21 (18552)
Packed designation 18552
a 2.76614
e 0.11073
i / sin(i) 10.1953 / 0.17700
q 2.45983
Q 3.07245
ω 345.6933
Node 114.0742
m 175.1873
n 0.2142
Epoch 2459600.5
nobs 2208
nopp 19
Years observed 1997-2021
rms 0.48
Best values
[raw, vot]

Value Standard error
Parent Gefion (1272)
 
ap 2.768
ep 0.123
sin(ip) 0.157
Value Standard error
G 0.150
H 13.790
Mass
D 4.88 0.325
pV 0.296 0.1019
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
1272 Gefion 516 Gefion -0.4200 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.7680 0.1228 0.1572 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Jan-2022
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
4.88 0.325 0.325 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.296 0.1019 0.1019 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
13.79 MPC-2022-01-18 MPC-2022-01-18 Phot