1981 EF44

1981EF44, 1976 JP8, 1976JP8, 1999 TF159, 1999TF159, 35047, J76J08P, J81E44F, J99TF9F

All data for this body: [vot]

MPC data
Name (number) 1981 EF44 (35047)
a 3.08019
e 0.14358
i / sin(i) 4.2988 / 0.07496
q 2.63792
Q 3.52246
ω 297.9995
Node 331.4429
m 339.6584
n 0.1823
Epoch 2460800.5
nobs 1113
nopp 23
Years observed 1976-2025
rms 0.83
Best values
[raw, vot]

Value Standard error
Parent Hygiea (10)
 
ap 3.084
ep 0.148
sin(ip) 0.091
G 0.150
H 14.890
Mass
D 6.62 0.133
pV 0.030 0.0039
Value
Rotational Period
Period quality None
Spectral Class B
Spectral Class Score 3.552
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
10 Hygiea 0 Hygiea Novakovic 2019EPSC...13.1671N HCM
10 Hygiea 601 Hygiea Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.0841 0.1483 0.0908 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
6.62 0.133 0.133 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.030 0.0039 0.0039 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
14.89 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 0.592 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT