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20945 (2248 T-2)
Classification:
Main-belt Asteroid
SPK-ID:
2020945
[
Ephemeris
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Orbit Diagram
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Orbital Elements
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Mission Design
|
Physical Parameters
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Discovery Circumstances
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[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference:
JPL 23
(heliocentric ecliptic J2000)
Element
Value
Uncertainty (1-sigma)
Units
e
.1492325400622663
4.2688e-08
a
2.238080401951671
5.8942e-09
au
q
1.904085978704845
9.4268e-08
au
i
5.693419576269108
4.4243e-06
deg
node
191.9863594631355
3.1442e-05
deg
peri
183.6371618709017
3.3542e-05
deg
M
30.8275911273329
1.0473e-05
deg
t
p
2459095.775319816042
(2020-Sep-03.27531982)
3.5592e-05
TDB
period
1222.959157285494
3.35
4.8312e-06
1.323e-08
d
yr
n
.2943679663015596
1.1629e-09
deg/d
Q
2.572074825198497
6.7738e-09
au
Orbit Determination Parameters
# obs. used (total)
1145
data-arc span
17312 days (47.40 yr)
first obs. used
1973-09-19
last obs. used
2021-02-11
planetary ephem.
DE441
SB-pert. ephem.
SB441-N16
condition code
0
norm. resid. RMS
.49562
source
ORB
producer
Otto Matic
solution date
2021-Apr-13 03:35:08
Additional Information
Earth MOID
= .903728 au
Jupiter MOID
= 2.89119 au
T_jup
= 3.616
[ show covariance matrix ]
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Physical Parameter Table
Parameter
Symbol
Value
Units
Sigma
Reference
Notes
absolute magnitude
H
15.94
n/a
E2021B10
diameter
diameter
1.582
km
0.231
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)
geometric albedo
albedo
0.370
0.172
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)
20945 (2248 T-2)
Discovered 1973-Sep-29 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference:
20010109/Numbers.arc
Last Updated:
2004-04-19
Alternate Designations
2248 T-2
= 1990 WQ11 = 1998 EP7 = 2000 UQ55
[
Ephemeris
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Orbit Diagram
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Orbital Elements
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Mission Design
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2021-Apr-18 00:40 UT
(server date/time)
Site Manager:
Ryan S. Park
Webmaster
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