1981 SU2

1981SU2, 05499, 1954 XH, 1954XH, 1986 AX1, 1986AX1, J54X00H, J81S02U, J86A01X

All data for this body: [vot]

MPC data
Name (number) 1981 SU2 (5499)
a 2.26934
e 0.13404
i / sin(i) 2.1209 / 0.03701
q 1.96515
Q 2.57354
ω 84.7396
Node 312.7702
m 240.8980
n 0.2883
Epoch 2460800.5
nobs 3763
nopp 26
Years observed 1950-2025
rms 0.69
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.269
ep 0.116
sin(ip) 0.046
G 0.150
H 13.890
Mass
D 3.81 0.111
pV 0.255 0.0501
Value
Rotational Period 3.692
Period quality 3
Spectral Class S
Spectral Class Score 38.270
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.2690 0.1163 0.0464 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
3.81 0.111 0.111 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.255 0.0501 0.0501 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
13.89 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
1.02 Synodic Erasmus 2018ApJS..237...19E Lightcurve
1.02 Synodic Erasmus 2019ApJS..242...15E Lightcurve
3.6925 3 Synodic Behrend LCDB Lightcurve
3.69277 2 Sidereal Durech 2023A&A...675A..24D Model
3.75 Synodic Erasmus 2018ApJS..237...19E Lightcurve
3.75 2 Synodic Erasmus 2019ApJS..242...15E 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 None Bus VIS Carvano 2010A&A...510A..43C PHOT
S 0.696 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
S 0.954000 Bus-DeMeo VIS Erasmus 2019ApJS..242...15E PHOT
S 0.955000 Bus-DeMeo VIS Erasmus 2018ApJS..237...19E PHOT
S D 0.666000 0.235000 Bus-DeMeo VIS Erasmus 2018ApJS..237...19E PHOT
S D 0.674000 0.235000 Bus-DeMeo VIS Erasmus 2019ApJS..242...15E PHOT
S S 0.7670 0.8920 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S S 0.9997 0.8920 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT