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JPL Small-Body Database Browser
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305978 (2009 HL99)
Classification:
Main-belt Asteroid
SPK-ID:
2305978
[
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 11
(heliocentric ecliptic J2000)
Element
Value
Uncertainty (1-sigma)
Units
e
.03813489584944628
8.1196e-08
a
3.015396919969157
4.7603e-08
au
q
2.900405072481392
2.6723e-07
au
i
9.066690311133565
1.3488e-05
deg
node
217.7016838762392
6.3815e-05
deg
peri
41.98067857671816
0.00026382
deg
M
285.1797788426146
0.00025991
deg
t
p
2458997.994976094348
(2020-May-28.49497609)
0.0013831
TDB
period
1912.560390498663
5.24
4.5289e-05
1.24e-07
d
yr
n
.1882293504500201
4.4572e-09
deg/d
Q
3.130388767456922
4.9418e-08
au
Orbit Determination Parameters
# obs. used (total)
160
data-arc span
5449 days (14.92 yr)
first obs. used
2004-05-09
last obs. used
2019-04-10
planetary ephem.
DE431
SB-pert. ephem.
SB431-N16
condition code
0
norm. resid. RMS
.66316
source
ORB
producer
Otto Matic
solution date
2019-Jul-14 12:17:24
Additional Information
Earth MOID
= 1.89296 au
Jupiter MOID
= 1.8788 au
T_jup
= 3.228
[ 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
|
Close-Approach Data
]
Physical Parameter Table
Parameter
Symbol
Value
Units
Sigma
Reference
Notes
absolute magnitude
H
15.7
n/a
MPO433971
305978 (2009 HL99)
Discovered 2009-Apr-21 by Mt. Lemmon Survey at Mount Lemmon
Reference:
20111110/Numbers.arc
Last Updated:
2011-11-14
[ show close-approach data ]
Alternate Designations
2009 HL99
= 2006 UD281
[
Ephemeris
|
Orbit Diagram
|
Orbital Elements
|
Mission Design
|
Physical Parameters
|
Discovery Circumstances
|
Close-Approach Data
]
2019-Dec-12 13:56 UT
(server date/time)
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