1999 XS204

1999XS204, 1972 HG, 1972HG, 29989, J72H00G, J99XK4S

All data for this body: [vot]

MPC data
Name (number) 1999 XS204 (29989)
a 2.59205
e 0.23578
i / sin(i) 12.1001 / 0.20962
q 1.98089
Q 3.20322
ω 246.9437
Node 38.8507
m 206.2273
n 0.2362
Epoch 2460800.5
nobs 3498
nopp 23
Years observed 1972-2025
rms 0.72
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.593
ep 0.214
sin(ip) 0.209
G 0.150
H 13.530
Mass
D 5.21 0.024
pV 0.413 0.0308
Value
Rotational Period 19.718
Period quality 2
Spectral Class L
Spectral Class Score 8.919
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.5934 0.2145 0.2087 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
4.78 0.050 0.050 Masiero 2014ApJ...791..121M NEATM
5.34 0.027 0.027 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.358 0.0482 0.0482 Masiero 2011ApJ...741...68M NEATM
0.450 0.0400 0.0400 Masiero 2014ApJ...791..121M 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
13.53 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
19.7189 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
L DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
L 0.72 Bus VIS Carvano 2010A&A...510A..43C PHOT
L L 0.9131 0.9131 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S 0.442 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT