2001 SY

2001SY, 1991 HB4, 1991HB4, 1997 UQ13, 1997UQ13, 1999 CZ62, 1999CZ62, 55273, J91H04B, J97U13Q, J99C62Z, K01S00Y

All data for this body: [vot]

MPC data
Name (number) 2001 SY (55273)
a 2.63500
e 0.06459
i / sin(i) 4.7333 / 0.08252
q 2.46481
Q 2.80520
ω 0.2836
Node 213.7002
m 337.0853
n 0.2304
Epoch 2460800.5
nobs 2271
nopp 24
Years observed 1991-2025
rms 0.75
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.636
ep 0.124
sin(ip) 0.092
G 0.150
H 14.710
Mass
D 6.67 0.910
pV 0.063 0.0280
Value
Rotational Period 8.900
Period quality 2
Spectral Class X
Spectral Class Score 6.502
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.6359 0.1236 0.0919 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
6.67 0.910 0.910 Masiero 2012ApJ...759L...8M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.063 0.0280 0.0280 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
14.71 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
8.903 2 Synodic Waszczak 2015AJ....150...75W Lightcurve
8.9087 2 Sidereal Durech 2023A&A...675A..24D Model
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
C 0.43 Bus VIS Carvano 2010A&A...510A..43C PHOT
X DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
X X 0.7504 0.7504 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT