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JPL Small-Body Database Browser
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146946 (2002 EC21)
Classification:
Inner Main-belt Asteroid
SPK-ID:
2146946
[
Ephemeris
|
Orbit Diagram
|
Orbital Elements
|
Mission Design
|
Physical Parameters
|
Discovery Circumstances
]
[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference:
JPL 13
(heliocentric ecliptic J2000)
Element
Value
Uncertainty (1-sigma)
Units
e
.09187989284156764
4.1482e-08
a
1.905620329502426
6.5e-09
au
q
1.730532137831031
7.9536e-08
au
i
19.86084835028046
6.8345e-06
deg
node
359.595690774988
1.3238e-05
deg
peri
84.28161887567319
5.0289e-05
deg
M
256.0539846664652
4.3085e-05
deg
t
p
2458877.933140331684
(2020-Jan-29.43314033)
0.00011453
TDB
period
960.8442439946465
2.63
4.9161e-06
1.346e-08
d
yr
n
.3746705069526397
1.917e-09
deg/d
Q
2.080708521173822
7.0972e-09
au
Orbit Determination Parameters
# obs. used (total)
436
data-arc span
7676 days (21.02 yr)
first obs. used
1998-11-19
last obs. used
2019-11-25
planetary ephem.
DE431
SB-pert. ephem.
SB431-N16
condition code
0
norm. resid. RMS
.60493
source
ORB
producer
Otto Matic
solution date
2019-Dec-04 13:01:38
Additional Information
Earth MOID
= .82974 au
Jupiter MOID
= 3.06939 au
T_jup
= 3.864
[ show covariance matrix ]
[
Ephemeris
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Orbit Diagram
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Orbital Elements
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Mission Design
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Physical Parameters
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Discovery Circumstances
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Physical Parameter Table
Parameter
Symbol
Value
Units
Sigma
Reference
Notes
absolute magnitude
H
16.7
n/a
MPO220373
146946 (2002 EC21)
Discovered 2002-Mar-10 by NEAT at Haleakala
Reference:
20070106/Numbers.arc
Last Updated:
2007-01-09
[
Ephemeris
|
Orbit Diagram
|
Orbital Elements
|
Mission Design
|
Physical Parameters
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Discovery Circumstances
]
2019-Dec-11 23:07 UT
(server date/time)
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