1998 JH4

1998JH4, 1999 RB81, 1999RB81, 1999 RY178, 1999RY178, 40027, J98J04H, J99R81B, J99RH8Y

All data for this body: [vot]

MPC data
Name (number) 1998 JH4 (40027)
a 2.69269
e 0.04512
i / sin(i) 3.7398 / 0.06523
q 2.57119
Q 2.81419
ω 207.9096
Node 85.4323
m 342.6301
n 0.2231
Epoch 2460800.5
nobs 1549
nopp 21
Years observed 1998-2025
rms 0.85
Best values
[raw, vot]

Value Standard error
Parent Henan (2085)
 
ap 2.692
ep 0.050
sin(ip) 0.046
G 0.150
H 15.120
Mass
D 2.98 0.572
pV 0.218 0.0814
Value
Rotational Period
Period quality None
Spectral Class S
Spectral Class Score 8.752
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
2085 Henan 532 Henan -0.1000 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.6923 0.0497 0.0464 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
2.98 0.572 0.572 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.218 0.0814 0.0814 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
15.12 MPC-2023-12-04 MPC-2023-12-04 Phot
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
S DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
S S 0.2193 0.7990 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S S 0.9060 0.7990 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
SQ 0.38 Bus VIS Carvano 2010A&A...510A..43C PHOT