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JPL Small-Body Database Browser
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74384 (1998 XQ20)
Classification:
Main-belt Asteroid
SPK-ID:
2074384
[
Ephemeris
|
Orbit Diagram
|
Orbital Elements
|
Mission Design
|
Physical Parameters
|
Discovery Circumstances
|
Close-Approach Data
]
[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference:
JPL 18
(heliocentric ecliptic J2000)
Element
Value
Uncertainty (1-sigma)
Units
e
.09873953817228628
4.6498e-08
a
2.983131747942404
2.718e-08
au
q
2.688578696843486
1.468e-07
au
i
12.97203313034919
5.1628e-06
deg
node
111.5459908216825
2.8661e-05
deg
peri
8.858049863232436
5.2664e-05
deg
M
334.3036848472824
4.2453e-05
deg
t
p
2458734.830746216720
(2019-Sep-08.33074622)
0.0002224
TDB
period
1881.945654488319
5.15
2.5721e-05
7.042e-08
d
yr
n
.1912913899194821
2.6144e-09
deg/d
Q
3.277684799041322
2.9864e-08
au
Orbit Determination Parameters
# obs. used (total)
526
data-arc span
7351 days (20.13 yr)
first obs. used
1998-12-10
last obs. used
2019-01-25
planetary ephem.
DE431
SB-pert. ephem.
SB431-N16
condition code
0
norm. resid. RMS
.58905
source
ORB
producer
Otto Matic
solution date
2019-Jul-13 10:35:47
Additional Information
Earth MOID
= 1.70576 au
Jupiter MOID
= 1.82583 au
T_jup
= 3.213
[ 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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Close-Approach Data
]
Physical Parameter Table
Parameter
Symbol
Value
Units
Sigma
Reference
Notes
absolute magnitude
H
14.7
n/a
MPO324953
diameter
diameter
3.551
km
0.786
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)
geometric albedo
albedo
0.202
0.083
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)
74384 (1998 XQ20)
Discovered 1998-Dec-10 by Spacewatch at Kitt Peak
Reference:
20040415/Numbers.arc
Last Updated:
2004-04-19
[ show close-approach data ]
[
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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Close-Approach Data
]
2019-Dec-15 11:13 UT
(server date/time)
Site Manager:
Ryan S. Park
Webmaster
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Alan B. Chamberlin