1998 UG4

1998UG4, 1999 XH191, 1999XH191, 40234, J98U04G, J99XJ1H

All data for this body: [vot]

MPC data
Name (number) 1998 UG4 (40234)
a 3.20454
e 0.14659
i / sin(i) 12.3164 / 0.21331
q 2.73479
Q 3.67430
ω 320.3438
Node 42.9490
m 223.5858
n 0.1718
Epoch 2460800.5
nobs 1818
nopp 22
Years observed 1998-2025
rms 0.75
Best values
[raw, vot]

Value Standard error
Parent
 
ap 3.212
ep 0.119
sin(ip) 0.200
G 0.150
H 13.690
Mass
D 5.62 0.630
pV 0.223 0.0440
Value
Rotational Period 4.000
Period quality 2
Spectral Class C
Spectral Class Score 1.248
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.2125 0.1186 0.2000 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
5.62 0.630 0.630 Masiero 2012ApJ...759L...8M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.223 0.0440 0.0440 Masiero 2012ApJ...759L...8M 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
13.69 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
4.007 2 Synodic Waszczak 2015AJ....150...75W Lightcurve
4.00718 2 Sidereal Durech 2023A&A...675A..24D Model
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
C 0.208 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT