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JPL Small-Body Database Browser
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249488 (2009 UN129)
Classification: Main-belt Asteroid          SPK-ID: 2249488
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1366506280685568 1.0977e-07  
a 2.674816341857482 3.3274e-08 au
q 2.309301008774617 3.0713e-07 au
i 10.3667571208449 8.2438e-06 deg
node 255.6810069396486 4.3266e-05 deg
peri 264.2852248658933 5.4846e-05 deg
M 322.2272038680393 3.1687e-05 deg
tp 2458768.154807981570
(2019-Oct-11.65480798)
0.00014188 TDB
period 1597.8624050629
4.37
2.9815e-05
8.163e-08
d
yr
n .225301001424981 4.204e-09 deg/d
Q 3.040331674940346 3.7821e-08 au
  Orbit Determination Parameters
   # obs. used (total)      251  
   data-arc span      8074 days (22.11 yr)  
   first obs. used      1996-12-31  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60482  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:43:20  

Additional Information
 Earth MOID = 1.34644 au 
 Jupiter MOID = 2.09185 au 
 T_jup = 3.343 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1376340571431155 1.0968e-07  
q 2.305735903868426 3.0697e-07 au
tp 2457171.379927345610
(2015-May-28.87992735)
0.00013167 TDB
node 255.7477228770879 4.3241e-05 deg
peri 264.5180060388653 5.4666e-05 deg
i 10.37125484920996 8.2489e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      251  
   data-arc span      8074 days (22.11 yr)  
   first obs. used      1996-12-31  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60482  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:43:20  

Additional Information
 Jupiter MOID = 2.09185 au 
 T_jup = 3.343 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.203073790105168E-14 -3.355128035177904E-14 -1.566438654307699E-12 3.399724526890427E-14 3.658391806016026E-13 -3.752350797181793E-14
q -3.355128035177904E-14 9.422916605486442E-14 4.994768306958165E-12 -9.474671723939479E-14 -9.026885134961608E-13 1.075588221422856E-13
tp -1.566438654307699E-12 4.994768306958165E-12 1.733744808788192E-8 -3.384643460593467E-11 4.367237959874976E-9 1.612323862568547E-11
node 3.399724526890427E-14 -9.474671723939479E-14 -3.384643460593467E-11 1.86976030818899E-9 -1.845186011939216E-9 1.323691520294689E-10
peri 3.658391806016026E-13 -9.026885134961608E-13 4.367237959874976E-9 -1.845186011939216E-9 2.988380515889925E-9 -1.286966208804168E-10
i -3.752350797181793E-14 1.075588221422856E-13 1.612323862568547E-11 1.323691520294689E-10 -1.286966208804168E-10 6.804415058292639E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.1   n/a MPO326121  
diameter diameter 4.167 km 0.323 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.044   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249488 (2009 UN129)          Discovered 2009-Oct-26 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20100824/Numbers.arcLast Updated: 2010-08-27

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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