1990 QX4

1990QX4, 19154, 1999 JK1, 1999JK1, J90Q04X, J99J01K

All data for this body: [vot]

MPC data
Name (number) 1990 QX4 (19154)
a 2.18295
e 0.18258
i / sin(i) 5.1970 / 0.09058
q 1.78439
Q 2.58151
ω 289.1273
Node 46.8661
m 273.5179
n 0.3056
Epoch 2460800.5
nobs 2519
nopp 21
Years observed 1990-2025
rms 0.71
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.182
ep 0.117
sin(ip) 0.082
G 0.150
H 15.090
Mass
D 2.69 0.575
pV 0.245 0.0947
Value
Rotational Period 38.700
Period quality 2
Spectral Class S
Spectral Class Score 30.806
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.1821 0.1174 0.0817 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
2.69 0.575 0.575 Masiero 2017AJ....154..168M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.245 0.0947 0.0947 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
15.09 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
38.71 2 Synodic Chang 2019ApJS..241....6C Lightcurve
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 None Bus VIS Carvano 2010A&A...510A..43C PHOT
S 0.942 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
S S 0.7753 0.8980 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S S 0.8235 0.8980 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S S 0.9599 0.8980 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S S 0.9670 0.8980 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT