1981 EQ4

1981EQ4, 17376, 1976 JQ5, 1976JQ5, J76J05Q, J81E04Q

All data for this body: [vot]

MPC data
Name (number) 1981 EQ4 (17376)
a 3.11932
e 0.13137
i / sin(i) 8.5583 / 0.14882
q 2.70954
Q 3.52910
ω 277.5870
Node 227.4549
m 40.6464
n 0.1789
Epoch 2460800.5
nobs 2160
nopp 24
Years observed 1976-2025
rms 0.71
Best values
[raw, vot]

Value Standard error
Parent
 
ap 3.112
ep 0.162
sin(ip) 0.169
G 0.150
H 14.360
Mass
D 8.98 0.160
pV 0.053 0.0068
Value
Rotational Period 136.170
Period quality 2
Spectral Class C
Spectral Class Score 2.842
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.1125 0.1615 0.1685 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
11.06 3.880 3.880 Masiero 2021PSJ.....2..162M NEATM
8.98 0.160 0.160 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.030 0.0160 0.0330 Masiero 2021PSJ.....2..162M NEATM
0.055 0.0071 0.0071 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
14.36 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
136.172 2 Synodic Pal 2020ApJS..247...26P Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
C 0.36 Bus VIS Carvano 2010A&A...510A..43C PHOT
C X 0.3537 0.3350 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
X X 0.3634 0.3350 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT