1981 EY45

1981EY45, 29120, J81E45Y

All data for this body: [vot]

MPC data
Name (number) 1981 EY45 (29120)
a 3.13446
e 0.19310
i / sin(i) 4.1761 / 0.07282
q 2.52921
Q 3.73972
ω 93.4097
Node 316.7366
m 91.8288
n 0.1776
Epoch 2460800.5
nobs 2029
nopp 22
Years observed 1978-2025
rms 0.75
Best values
[raw, vot]

Value Standard error
Parent Hygiea (10)
 
ap 3.145
ep 0.160
sin(ip) 0.094
G 0.150
H 14.130
Mass
D 7.84 0.511
pV 0.104 0.0260
Value
Rotational Period
Period quality None
Spectral Class C
Spectral Class Score 2.493
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
3.1448 0.1599 0.0939 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
7.84 0.511 0.511 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.104 0.0260 0.0260 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
14.13 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 DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
C 0.44 Bus VIS Carvano 2010A&A...510A..43C PHOT
C C 0.2689 0.2689 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT