1991 NB4

1991NB4, 09182, 1933 WG, 1933WG, 1992 YU, 1992YU, J33W00G, J91N04B, J92Y00U

All data for this body: [vot]

MPC data
Name (number) 1991 NB4 (9182)
a 2.28587
e 0.08894
i / sin(i) 3.7293 / 0.06504
q 2.08258
Q 2.48917
ω 157.4249
Node 270.9622
m 151.9520
n 0.2852
Epoch 2460800.5
nobs 4002
nopp 23
Years observed 1991-2025
rms 0.68
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.286
ep 0.101
sin(ip) 0.077
G 0.150
H 13.700
Mass
D 6.84 0.047
pV 0.109 0.0128
Value
Rotational Period 5.410
Period quality 2+
Spectral Class L
Spectral Class Score 4.626
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.2858 0.1007 0.0771 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
6.09 1.250 1.250 Masiero 2012ApJ...759L...8M NEATM
6.77 0.130 0.130 Masiero 2014ApJ...791..121M NEATM
6.85 0.050 0.050 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.104 0.0171 0.0171 Masiero 2011ApJ...741...68M NEATM
0.110 0.0200 0.0200 Masiero 2014ApJ...791..121M NEATM
0.208 0.0730 0.0730 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
13.70 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
5.416 2+ Synodic Clark 2015MPBu...42...15C Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
Ds Ds None None Movis NIR Popescu 2018A&A...617A..12P PHOT
L 0.771 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT