Massar

18946, 1979 WH1, 1979WH1, 1992 EO27, 1992EO27, 1995 UZ42, 1995UZ42, 2000 QM75, 2000QM75, J79W01H, J92E27O, J95U42Z, K00Q75M

All data for this body: [vot]

MPC data
Name (number) Massar (18946)
a 3.05050
e 0.17496
i / sin(i) 0.5164 / 0.00901
q 2.51677
Q 3.58423
ω 44.7422
Node 340.5399
m 199.5297
n 0.1850
Epoch 2460800.5
nobs 1874
nopp 27
Years observed 1979-2025
rms 0.80
Best values
[raw, vot]

Value Standard error
Parent Themis (24)
 
ap 3.051
ep 0.140
sin(ip) 0.028
G 0.150
H 14.340
Mass
D 8.67 0.227
pV 0.055 0.0101
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
24 Themis 0 Themis Novakovic 2019EPSC...13.1671N HCM
24 Themis 602 Themis -0.5300 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.0510 0.1401 0.0275 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
7.37 2.103 2.103 Masiero 2017AJ....154..168M NEATM
8.68 0.228 0.228 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.054 0.0105 0.0105 Masiero 2011ApJ...741...68M NEATM
0.068 0.0372 0.0372 Masiero 2017AJ....154..168M 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
14.34 MPC-2023-12-04 MPC-2023-12-04 Phot