1981 ET45

1981ET45, 1998 FK144, 1998FK144, 58138, J81E45T, J98FE4K

All data for this body: [vot]

MPC data
Name (number) 1981 ET45 (58138)
a 3.16457
e 0.27986
i / sin(i) 12.9363 / 0.22387
q 2.27895
Q 4.05019
ω 274.5040
Node 193.9338
m 347.0031
n 0.1751
Epoch 2460800.5
nobs 820
nopp 18
Years observed 1981-2025
rms 0.84
Best values
[raw, vot]

Value Standard error
Parent Theobalda (778)
 
ap 3.181
ep 0.256
sin(ip) 0.248
G 0.150
H 15.450
Mass
D 5.00 1.850
pV 0.071 0.0540
Value
Rotational Period
Period quality None
Spectral Class S
Spectral Class Score 0.634
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
778 Theobalda 0 Theobalda Novakovic 2019EPSC...13.1671N HCM
778 Theobalda 617 Theobalda Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.1812 0.2559 0.2485 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
5.00 1.850 1.850 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.071 0.0540 0.0540 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
15.45 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 S 0.0420 0.0630 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S S 0.1057 0.0630 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT