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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1434294189263483 3.7584e-08  
a 3.176193200036386 2.4582e-08 au
q 2.720633654957349 1.1502e-07 au
i 22.34438962534367 5.7138e-06 deg
node 23.26399182728156 1.0051e-05 deg
peri 249.4931996630179 2.2811e-05 deg
M 138.4253497605268 2.24e-05 deg
tp 2458405.491223527046
(2018-Oct-13.99122353)
0.00012601 TDB
period 2067.563203021624
5.66
2.4003e-05
6.572e-08
d
yr
n .1741180146144412 2.0214e-09 deg/d
Q 3.631752745115424 2.8108e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1274  
   data-arc span      7724 days (21.15 yr)  
   first obs. used      2000-01-29  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50404  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 08:56:37  

Additional Information
 Earth MOID = 1.79319 au 
 Jupiter MOID = 1.65013 au 
 T_jup = 3.069 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457815.5 (2017-Mar-03.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1452062062775338 3.727e-08  
q 2.713818034849344 1.1443e-07 au
tp 2458407.241026064411
(2018-Oct-15.74102606)
0.00012522 TDB
node 23.29421689753346 1.004e-05 deg
peri 249.8912720968415 2.2724e-05 deg
i 22.3659934363743 5.718e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1274  
   data-arc span      7724 days (21.15 yr)  
   first obs. used      2000-01-29  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50404  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 08:56:37  

Additional Information
 Jupiter MOID = 1.65013 au 
 T_jup = 3.069 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.389081737660388E-15 -4.199180901178696E-15 2.048818793781643E-13 -1.10620075851447E-15 -2.031191142339229E-14 3.000601521993305E-15
q -4.199180901178696E-15 1.309515168185991E-14 -3.245652185340077E-14 2.684229486629056E-15 1.320089914432171E-13 -8.231483062317315E-15
tp 2.048818793781643E-13 -3.245652185340077E-14 1.568121146978459E-8 4.370331463324566E-12 2.556166165490198E-9 -2.749295778190106E-12
node -1.10620075851447E-15 2.684229486629056E-15 4.370331463324566E-12 1.008061358994231E-10 -9.202372664919864E-11 -2.918748911062613E-12
peri -2.031191142339229E-14 1.320089914432171E-13 2.556166165490198E-9 -9.202372664919864E-11 5.163768391192729E-10 1.95335965413728E-12
i 3.000601521993305E-15 -8.231483062317315E-15 -2.749295778190106E-12 -2.918748911062613E-12 1.95335965413728E-12 3.26960411530462E-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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