1999 TD174

1999TD174, 1990 QY6, 1990QY6, 42970, J90Q06Y, J99TH4D

All data for this body: [vot]

MPC data
Name (number) 1999 TD174 (42970)
a 2.62566
e 0.10540
i / sin(i) 3.6201 / 0.06314
q 2.34892
Q 2.90240
ω 161.7314
Node 135.1511
m 91.3738
n 0.2317
Epoch 2460800.5
nobs 1809
nopp 23
Years observed 1990-2025
rms 0.77
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.626
ep 0.101
sin(ip) 0.051
G 0.150
H 15.100
Mass
D 2.83 0.556
pV 0.266 0.0881
Value
Rotational Period 18.400
Period quality 2
Spectral Class L
Spectral Class Score 6.649
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.6263 0.1005 0.0508 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
2.83 0.556 0.556 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.266 0.0881 0.0881 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
15.10 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
18.46 2 Synodic Chang 2015ApJS..219...27C Lightcurve
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 0.60 Bus VIS Carvano 2010A&A...510A..43C PHOT
L L 0.5749 0.3920 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S L 0.1581 0.3920 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S L 0.5594 0.3920 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT