1990 OB4

1990OB4, 13040, J90O04B

All data for this body: [vot]

MPC data
Name (number) 1990 OB4 (13040)
a 2.64767
e 0.24482
i / sin(i) 11.4945 / 0.19928
q 1.99947
Q 3.29586
ω 84.7287
Node 271.3753
m 2.7700
n 0.2288
Epoch 2460800.5
nobs 3854
nopp 24
Years observed 1990-2025
rms 0.58
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.648
ep 0.191
sin(ip) 0.228
G 0.150
H 13.840
Mass
D 5.56 1.694
pV 0.249 0.0957
Value
Rotational Period 55.103
Period quality 2
Spectral Class S
Spectral Class Score 8.025
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.6478 0.1910 0.2284 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
5.56 1.694 1.694 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.249 0.0957 0.0957 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
13.84 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
55.1035 2 Synodic Pal 2020ApJS..247...26P Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
Ad Ad None None Movis NIR Popescu 2018A&A...617A..12P PHOT
S DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
S 0.58 Bus VIS Carvano 2010A&A...510A..43C PHOT
S S 0.8109 0.8109 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT