1991 EJ4

1991EJ4, 09043, 1982 QD1, 1982QD1, 1982 SX7, 1982SX7, 1986 GK, 1986GK, 1996 AK2, 1996AK2, J82Q01D, J82S07X, J86G00K, J91E04J, J96A02K

All data for this body: [vot]

MPC data
Name (number) 1991 EJ4 (9043)
a 3.06720
e 0.12518
i / sin(i) 4.1162 / 0.07178
q 2.68326
Q 3.45114
ω 324.8913
Node 313.5922
m 21.2111
n 0.1835
Epoch 2460800.5
nobs 4217
nopp 28
Years observed 1954-2025
rms 0.63
Best values
[raw, vot]

Value Standard error
Parent Hygiea (10)
 
ap 3.069
ep 0.128
sin(ip) 0.089
G 0.150
H 12.680
Mass
D 21.88 0.980
pV 0.036 0.0070
Value
Rotational Period 6.020
Period quality 2
Spectral Class B
Spectral Class Score 5.292
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
3.0689 0.1275 0.0892 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
20.43 4.090 4.090 Ali-Lagoa 2018A&A...612A..85A NEATM
20.68 5.690 5.690 Nugent 2016AJ....152...63N NEATM
21.63 1.110 1.110 Usui 2011PASJ...63.1117U NEATM
23.32 8.283 8.283 Masiero 2017AJ....154..168M NEATM
23.89 3.410 3.410 Masiero 2012ApJ...759L...8M NEATM
25.23 5.050 5.050 Ali-Lagoa 2018A&A...612A..85A NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.022 0.0189 0.0189 Masiero 2017AJ....154..168M NEATM
0.030 0.0120 0.0120 Ali-Lagoa 2018A&A...612A..85A NEATM
0.030 0.0500 0.0500 Nugent 2016AJ....152...63N NEATM
0.044 0.0120 0.0120 Masiero 2012ApJ...759L...8M NEATM
0.046 0.0180 0.0180 Ali-Lagoa 2018A&A...612A..85A 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
12.68 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
5.83 2 Synodic Erasmus 2019ApJS..242...15E Lightcurve
6.026 2 Synodic Waszczak 2015AJ....150...75W Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
B 0.882 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
C X 0.798000 0.202000 Bus-DeMeo VIS Erasmus 2019ApJS..242...15E PHOT