Hirabayashi

06390, 1964 WJ1, 1964WJ1, 1976 JK2, 1976JK2, 1987 MH, 1987MH, 1990 BG1, 1990BG1, J64W01J, J76J02K, J87M00H, J90B01G

All data for this body: [vot]

MPC data
Name (number) Hirabayashi (6390)
a 2.88351
e 0.17360
i / sin(i) 6.0725 / 0.10579
q 2.38293
Q 3.38409
ω 82.0559
Node 74.5389
m 55.2642
n 0.2013
Epoch 2460800.5
nobs 4263
nopp 28
Years observed 1964-2025
rms 0.67
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.883
ep 0.209
sin(ip) 0.092
G 0.150
H 12.960
Mass
D 14.65 0.078
pV 0.061 0.0026
Value
Rotational Period
Period quality None
Spectral Class B
Spectral Class Score 4.770
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.8830 0.2090 0.0920 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
13.35 4.500 4.500 Nugent 2016AJ....152...63N NEATM
13.70 3.190 3.190 Masiero 2021PSJ.....2..162M NEATM
14.05 4.080 4.080 Masiero 2021PSJ.....2..162M NEATM
14.60 4.490 4.490 Nugent 2016AJ....152...63N NEATM
14.60 0.102 0.102 Masiero 2011ApJ...741...68M NEATM
14.71 0.120 0.120 Masiero 2014ApJ...791..121M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.050 0.0400 0.0400 Nugent 2016AJ....152...63N NEATM
0.054 0.0210 0.0360 Masiero 2021PSJ.....2..162M NEATM
0.060 0.0400 0.0400 Nugent 2016AJ....152...63N NEATM
0.061 0.0027 0.0027 Masiero 2011ApJ...741...68M NEATM
0.061 0.0270 0.0490 Masiero 2021PSJ.....2..162M NEATM
0.070 0.0100 0.0100 Masiero 2014ApJ...791..121M 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
12.96 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 0.795 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT