1998 HP18

1998HP18, 2000 SQ109, 2000SQ109, 55944, J98H18P, K00SA9Q

All data for this body: [vot]

MPC data
Name (number) 1998 HP18 (55944)
a 3.01289
e 0.06370
i / sin(i) 9.9118 / 0.17213
q 2.82095
Q 3.20482
ω 242.3524
Node 7.2701
m 13.4468
n 0.1885
Epoch 2460800.5
nobs 1087
nopp 19
Years observed 1998-2024
rms 0.81
Best values
[raw, vot]

Value Standard error
Parent Eos (221)
 
ap 3.013
ep 0.084
sin(ip) 0.175
G 0.150
H 14.740
Mass
D 4.39 0.735
pV 0.174 0.0826
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
221 Eos 0 Eos Novakovic 2019EPSC...13.1671N HCM
221 Eos 606 Eos -0.1100 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.0134 0.0838 0.1748 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
4.39 0.735 0.735 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.174 0.0826 0.0826 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
14.74 MPC-2023-12-04 MPC-2023-12-04 Phot