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115488 (2003 UL21)
Classification: Main-belt Asteroid          SPK-ID: 2115488
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1432041073532505 3.7581e-08  
a 3.176895004826898 2.459e-08 au
q 2.721950591505662 1.1504e-07 au
i 22.34216371387218 5.7021e-06 deg
node 23.25687642563245 1.0046e-05 deg
peri 249.5410063529401 2.2815e-05 deg
M 172.5035308154455 2.2544e-05 deg
tp 2458405.443971896451
(2018-Oct-13.94397190)
0.00012613 TDB
period 2068.248507324655
5.66
2.4013e-05
6.574e-08
d
yr
n .1740603214386802 2.0209e-09 deg/d
Q 3.631839418148134 2.8111e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1294  
   data-arc span      7745 days (21.20 yr)  
   first obs. used      2000-01-29  
   last obs. used      2021-04-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50087  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 00:35:08  

Additional Information
 Earth MOID = 1.79611 au 
 Jupiter MOID = 1.64885 au 
 T_jup = 3.068 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457821.5 (2017-Mar-09.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1452015326754314 3.7272e-08  
q 2.713880601622961 1.1445e-07 au
tp 2458407.215235104452
(2018-Oct-15.71523510)
0.00012512 TDB
node 23.29419569524243 1.0034e-05 deg
peri 249.8843709963683 2.2697e-05 deg
i 22.36600056895488 5.7069e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1294  
   data-arc span      7745 days (21.20 yr)  
   first obs. used      2000-01-29  
   last obs. used      2021-04-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50087  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 00:35:08  

Additional Information
 Jupiter MOID = 1.64885 au 
 T_jup = 3.068 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.38922682180276E-15 -4.200106344866512E-15 2.048124909105439E-13 -1.096504890614546E-15 -2.030024935379273E-14 2.992268103217317E-15
q -4.200106344866512E-15 1.309924537867861E-14 -2.943523756460513E-14 2.65897867336659E-15 1.32554973038585E-13 -8.215370472548103E-15
tp 2.048124909105439E-13 -2.943523756460513E-14 1.565421197350161E-8 4.325872374826316E-12 2.550706020451949E-9 -2.720105191249738E-12
node -1.096504890614546E-15 2.65897867336659E-15 4.325872374826316E-12 1.006854286456302E-10 -9.19218940479882E-11 -2.795355433724639E-12
peri -2.030024935379273E-14 1.32554973038585E-13 2.550706020451949E-9 -9.19218940479882E-11 5.15173344665418E-10 1.846365290460664E-12
i 2.992268103217317E-15 -8.215370472548103E-15 -2.720105191249738E-12 -2.795355433724639E-12 1.846365290460664E-12 3.25682803779083E-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 13.46   n/a E2021B55  
diameter diameter 9.157 km 0.233 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.133   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

115488 (2003 UL21)          Discovered 2003-Oct-18 by NEAT at Palomar
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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