Ellenkey

18562, 1991 FP2, 1991FP2, 1997 EK54, 1997EK54, 1999 RL24, 1999RL24, J91F02P, J97E54K, J99R24L

All data for this body: [vot]

MPC data
Name (number) Ellenkey (18562)
a 3.19587
e 0.10210
i / sin(i) 1.5912 / 0.02777
q 2.86958
Q 3.52216
ω 247.5036
Node 35.4831
m 235.1711
n 0.1725
Epoch 2460800.5
nobs 2494
nopp 24
Years observed 1991-2025
rms 0.71
Best values
[raw, vot]

Value Standard error
Parent
 
ap 3.200
ep 0.103
sin(ip) 0.027
G 0.150
H 13.570
Mass
D 11.43 0.200
pV 0.043 0.0116
Value
Rotational Period 20.910
Period quality 2
Spectral Class C
Spectral Class Score 18.216
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.1995 0.1034 0.0269 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
11.30 nan nan Ali-Lagoa 2016A&A...591A..14A NEATM
11.30 nan nan Ali-Lagoa 2016A&A...591A..14A NEATM
11.69 0.347 0.347 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.043 0.0116 0.0116 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
13.57 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
20.918 2 Sidereal Durech 2023A&A...675A..24D Model
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
B DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
C 0.91 Bus VIS Carvano 2010A&A...510A..43C PHOT
C 0.948 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
C C 0.1728 0.7740 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
C C 0.7421 0.7740 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
C C 0.8698 0.7740 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT