1998 DT21

1998DT21, 16905, 1999 HD11, 1999HD11, J98D21T, J99H11D

All data for this body: [vot]

MPC data
Name (number) 1998 DT21 (16905)
a 3.03318
e 0.22025
i / sin(i) 2.0201 / 0.03525
q 2.36512
Q 3.70123
ω 296.7157
Node 51.4281
m 210.9846
n 0.1866
Epoch 2460800.5
nobs 2111
nopp 24
Years observed 1992-2025
rms 0.77
Best values
[raw, vot]

Value Standard error
Parent
 
ap 3.038
ep 0.183
sin(ip) 0.025
G 0.150
H 13.980
Mass
D 9.69 0.206
pV 0.055 0.0099
Value
Rotational Period
Period quality None
Spectral Class C
Spectral Class Score 3.402
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.0383 0.1826 0.0253 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
10.69 1.440 1.440 Masiero 2012ApJ...759L...8M NEATM
8.76 2.502 2.502 Masiero 2017AJ....154..168M NEATM
9.68 0.209 0.209 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.047 0.0180 0.0180 Masiero 2012ApJ...759L...8M NEATM
0.048 0.0241 0.0241 Masiero 2017AJ....154..168M NEATM
0.062 0.0137 0.0137 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
13.98 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 0.567 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT