1981 ER11

1981ER11, 19103, J81E11R

All data for this body: [vot]

MPC data
Name (number) 1981 ER11 (19103)
a 2.60864
e 0.06688
i / sin(i) 2.4047 / 0.04196
q 2.43417
Q 2.78311
ω 213.9487
Node 289.7757
m 197.8613
n 0.2339
Epoch 2460800.5
nobs 1158
nopp 21
Years observed 1979-2025
rms 0.80
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.609
ep 0.109
sin(ip) 0.060
G 0.150
H 15.670
Mass
D 2.50 0.655
pV 0.179 0.0812
Value
Rotational Period
Period quality None
Spectral Class D
Spectral Class Score 1.699
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.6094 0.1090 0.0604 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
2.50 0.655 0.655 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.179 0.0812 0.0812 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
15.67 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
A A 0.1613 0.1270 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
D A 0.2832 0.1270 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
V A 0.0314 0.1270 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT