1991 AB2

1991AB2, 11512, 1969 UO1, 1969UO1, 1996 TG51, 1996TG51, J69U01O, J91A02B, J96T51G

All data for this body: [vot]

MPC data
Name (number) 1991 AB2 (11512)
a 2.26742
e 0.12418
i / sin(i) 4.0339 / 0.07035
q 1.98585
Q 2.54898
ω 332.8143
Node 175.4113
m 349.0642
n 0.2887
Epoch 2460800.5
nobs 7202
nopp 22
Years observed 1990-2025
rms 0.53
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.268
ep 0.177
sin(ip) 0.079
G 0.150
H 13.940
Mass
D 4.35 0.072
pV 0.372 0.0557
Value
Rotational Period 2.993
Period quality 3
Spectral Class S
Spectral Class Score 11.145
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.2677 0.1768 0.0787 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
4.35 0.072 0.072 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.372 0.0557 0.0557 Masiero 2011ApJ...741...68M 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
13.94 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
2.93275 2+ Synodic Loera 2022MPBu...49..289L Lightcurve
2.933 2+ Synodic Hess 2016MPBu...43...87H Lightcurve
2.9334 3 Synodic Benishek 2022MPBu...49..333B 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 0.75 Bus VIS Carvano 2010A&A...510A..43C PHOT
S S DeMeo-Carry VIS Choi 2023PSJ.....4...49C PHOT
S S 0.9409 0.9409 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT