1991 UM4

1991UM4, 05487, 1983 RD8, 1983RD8, 1990 LC, 1990LC, J83R08D, J90L00C, J91U04M

All data for this body: [vot]

MPC data
Name (number) 1991 UM4 (5487)
a 2.41103
e 0.16146
i / sin(i) 2.3073 / 0.04026
q 2.02175
Q 2.80031
ω 241.2297
Node 355.8066
m 132.2751
n 0.2633
Epoch 2460800.5
nobs 3421
nopp 28
Years observed 1953-2025
rms 0.67
Best values
[raw, vot]

Value Standard error
Parent Nysa (44)
 
ap 2.413
ep 0.178
sin(ip) 0.047
G 0.150
H 13.970
Mass
D
pV
Value
Rotational Period 6.600
Period quality 2
Spectral Class S
Spectral Class Score 5.994
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
44 Nysa 405 Nysa-Polana -0.1900 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.4125 0.1776 0.0468 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
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
13.97 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
6.65 2 Synodic Erasmus 2019ApJS..242...15E Lightcurve
7.083 2 Synodic Erasmus 2020ApJS..247...13E Lightcurve
7.08344 2 Sidereal Durech 2020A&A...643A..59D Model
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
S 0.999000 Bus-DeMeo VIS Erasmus 2019ApJS..242...15E PHOT