1991 UB4

1991UB4, 09352, 1997 AH19, 1997AH19, J91U04B, J97A19H

All data for this body: [vot]

MPC data
Name (number) 1991 UB4 (9352)
a 2.64963
e 0.12771
i / sin(i) 3.7472 / 0.06535
q 2.31125
Q 2.98801
ω 325.5684
Node 189.2549
m 173.0352
n 0.2285
Epoch 2460800.5
nobs 5584
nopp 25
Years observed 1989-2025
rms 0.56
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.651
ep 0.165
sin(ip) 0.070
G 0.150
H 13.370
Mass
D 11.49 0.032
pV 0.075 0.0056
Value
Rotational Period
Period quality None
Spectral Class D
Spectral Class Score 1.613
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.6509 0.1648 0.0700 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
10.54 0.250 0.250 Nugent 2016AJ....152...63N NEATM
11.37 0.040 0.040 Masiero 2014ApJ...791..121M NEATM
11.90 0.055 0.055 Masiero 2011ApJ...741...68M NEATM
9.47 0.210 0.210 Nugent 2016AJ....152...63N NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.070 0.0100 0.0100 Nugent 2016AJ....152...63N NEATM
0.072 0.0102 0.0102 Masiero 2011ApJ...741...68M NEATM
0.080 0.0100 0.0100 Masiero 2014ApJ...791..121M NEATM
0.090 0.0200 0.0200 Nugent 2016AJ....152...63N 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
13.37 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
D D 0.2689 0.2689 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT