1981 EK40

1981EK40, 1992 TA2, 1992TA2, 1994 CN20, 1994CN20, 29117, J81E40K, J92T02A, J94C20N

All data for this body: [vot]

MPC data
Name (number) 1981 EK40 (29117)
a 2.73161
e 0.12607
i / sin(i) 4.7184 / 0.08226
q 2.38723
Q 3.07598
ω 188.6379
Node 187.1089
m 78.5418
n 0.2183
Epoch 2460800.5
nobs 2607
nopp 24
Years observed 1981-2025
rms 0.79
Best values
[raw, vot]

Value Standard error
Parent Nemesis (128)
 
ap 2.731
ep 0.088
sin(ip) 0.085
G 0.150
H 14.430
Mass
D 6.39 0.134
pV 0.119 0.0237
Value
Rotational Period
Period quality None
Spectral Class C
Spectral Class Score 7.176
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
128 Nemesis 504 Nemesis -1.2600 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.7307 0.0882 0.0846 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
6.39 0.134 0.134 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.119 0.0237 0.0237 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
14.43 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
B C 0.5193 0.2320 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
C DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
C 0.97 Bus VIS Carvano 2010A&A...510A..43C PHOT
C C 0.5394 0.2320 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
X C 0.4962 0.2320 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT