Sisiliang

18771, 1981 QW3, 1981QW3, 1999 JA26, 1999JA26, J81Q03W, J99J26A

All data for this body: [vot]

MPC data
Name (number) Sisiliang (18771)
a 2.40029
e 0.18968
i / sin(i) 2.1464 / 0.03745
q 1.94501
Q 2.85558
ω 119.7344
Node 208.8173
m 269.5533
n 0.2650
Epoch 2460800.5
nobs 2288
nopp 23
Years observed 1981-2025
rms 0.72
Best values
[raw, vot]

Value Standard error
Parent Nysa (44)
 
ap 2.401
ep 0.153
sin(ip) 0.049
G 0.150
H 15.340
Mass
D 5.60 0.118
pV 0.057 0.0063
Value
Rotational Period
Period quality None
Spectral Class B
Spectral Class Score 2.000
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
44 Nysa 405 Nysa-Polana -0.2200 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.4010 0.1533 0.0494 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
4.33 0.880 0.880 Masiero 2020PSJ.....1....5M NEATM
5.40 0.228 0.228 Masiero 2011ApJ...741...68M NEATM
5.71 0.139 0.139 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.054 0.0079 0.0079 Masiero 2011ApJ...741...68M NEATM
0.061 0.0108 0.0108 Masiero 2011ApJ...741...68M NEATM
0.078 0.0390 0.0390 Masiero 2020PSJ.....1....5M 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
15.34 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
B C DeMeo-Carry VIS Choi 2023PSJ.....4...49C PHOT
Ds Ad None None Movis NIR Popescu 2018A&A...617A..12P PHOT