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120421 (1604 T-2)
Classification:
Main-belt Asteroid
SPK-ID:
2120421
[
Ephemeris
|
Orbit Diagram
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Orbital Elements
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Mission Design
|
Physical Parameters
|
Discovery Circumstances
|
Close-Approach Data
]
[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference:
JPL 24
(heliocentric ecliptic J2000)
Element
Value
Uncertainty (1-sigma)
Units
e
.197205447092531
5.138e-08
a
2.51125061939352
1.1719e-08
au
q
2.016018318234626
1.3117e-07
au
i
7.33265938623147
4.8372e-06
deg
node
342.1621147720475
4.2803e-05
deg
peri
2.183109806976665
4.5041e-05
deg
M
322.7078000398728
1.6293e-05
deg
t
p
2459351.073663017958
(2021-May-16.57366302)
6.6116e-05
TDB
period
1453.561837178353
3.98
1.0175e-05
2.786e-08
d
yr
n
.2476674819000684
1.7337e-09
deg/d
Q
3.006482920552415
1.403e-08
au
Orbit Determination Parameters
# obs. used (total)
584
data-arc span
17070 days (46.74 yr)
first obs. used
1973-09-19
last obs. used
2020-06-14
planetary ephem.
DE431
SB-pert. ephem.
SB431-N16
condition code
0
norm. resid. RMS
.57027
source
ORB
producer
Otto Matic
solution date
2020-Nov-12 17:57:16
Additional Information
Earth MOID
= 1.00665 au
Jupiter MOID
= 2.40431 au
T_jup
= 3.423
[ show covariance matrix ]
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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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Close-Approach Data
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Physical Parameter Table
Parameter
Symbol
Value
Units
Sigma
Reference
Notes
absolute magnitude
H
15.89
n/a
E2021B55
120421 (1604 T-2)
Discovered 1973-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference:
20051116/Numbers.arc
Last Updated:
2005-11-21
[ show close-approach data ]
Alternate Designations
1604 T-2
= 2001 TX108
[
Ephemeris
|
Orbit Diagram
|
Orbital Elements
|
Mission Design
|
Physical Parameters
|
Discovery Circumstances
|
Close-Approach Data
]
2021-Mar-02 21:05 UT
(server date/time)
Site Manager:
Ryan S. Park
Webmaster
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Alan B. Chamberlin