1999 XT20

1999XT20, 1991 FF7, 1991FF7, 36257, J91F07F, J99X20T

All data for this body: [vot]

MPC data
Name (number) 1999 XT20 (36257)
a 3.12625
e 0.15468
i / sin(i) 2.4937 / 0.04351
q 2.64267
Q 3.60983
ω 151.3702
Node 123.8830
m 330.3932
n 0.1783
Epoch 2460800.5
nobs 3040
nopp 24
Years observed 1991-2025
rms 0.71
Best values
[raw, vot]

Value Standard error
Parent Themis (24)
 
ap 3.132
ep 0.155
sin(ip) 0.026
G 0.150
H 13.590
Mass
D 5.50 0.292
pV 0.212 0.0590
Value
Rotational Period
Period quality None
Spectral Class L
Spectral Class Score 8.315
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
24 Themis 0 Themis Novakovic 2019EPSC...13.1671N HCM
656 Beagle 0 Beagle Novakovic 2019EPSC...13.1671N HCM
24 Themis 602 Themis -0.0200 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.1324 0.1549 0.0263 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
5.50 0.292 0.292 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.212 0.0590 0.0590 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
13.59 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
L 0.62 Bus VIS Carvano 2010A&A...510A..43C PHOT
S DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
X 0.340 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
L L 0.4956 0.5930 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
L L 0.6835 0.5930 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT