1999 SY4

1999SY4, 2000 SZ276, 2000SZ276, 31822, J99S04Y, K00SR6Z

All data for this body: [vot]

MPC data
Name (number) 1999 SY4 (31822)
a 3.41188
e 0.04423
i / sin(i) 6.3829 / 0.11117
q 3.26098
Q 3.56279
ω 317.7160
Node 26.5518
m 10.3873
n 0.1564
Epoch 2460800.5
nobs 4247
nopp 23
Years observed 1997-2025
rms 0.66
Best values
[raw, vot]

Value Standard error
Parent
 
ap 3.416
ep 0.018
sin(ip) 0.107
G 0.150
H 12.390
Mass
D 22.52 0.141
pV 0.040 0.0033
Value
Rotational Period
Period quality None
Spectral Class C
Spectral Class Score 0.401
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.4163 0.0184 0.1071 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
22.39 4.480 4.480 Ali-Lagoa 2018A&A...612A..85A NEATM
22.40 0.304 0.304 Masiero 2011ApJ...741...68M NEATM
22.49 0.162 0.162 Masiero 2011ApJ...741...68M NEATM
23.93 0.780 0.780 Usui 2011PASJ...63.1117U NEATM
25.46 5.090 5.090 Ali-Lagoa 2018A&A...612A..85A NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.036 0.0140 0.0140 Ali-Lagoa 2018A&A...612A..85A NEATM
0.038 0.0049 0.0049 Masiero 2011ApJ...741...68M NEATM
0.043 0.0049 0.0049 Masiero 2011ApJ...741...68M NEATM
0.046 0.0180 0.0180 Ali-Lagoa 2018A&A...612A..85A 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
12.39 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
C C 0.0668 0.0668 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT