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102993 (1999 XL91)
Classification: Main-belt Asteroid          SPK-ID: 2102993
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1388948277244933 3.0285e-08  
a 2.247982719698714 7.245e-09 au
q 1.935749547118524 6.9605e-08 au
i 5.283500083993411 3.5317e-06 deg
node 86.55260827154545 3.931e-05 deg
peri 12.88621986316013 4.2237e-05 deg
M 83.40753750955214 1.4021e-05 deg
tp 2458915.272970972301
(2020-Mar-06.77297097)
4.81e-05 TDB
period 1231.084546024537
3.37
5.9515e-06
1.629e-08
d
yr
n .2924250825522301 1.4137e-09 deg/d
Q 2.560215892278905 8.2513e-09 au
  Orbit Determination Parameters
   # obs. used (total)      962  
   data-arc span      7797 days (21.35 yr)  
   first obs. used      1999-11-16  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49244  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 08:35:21  

Additional Information
 Earth MOID = .952808 au 
 Jupiter MOID = 2.58101 au 
 T_jup = 3.611 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457277.5 (2015-Sep-12.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1379970609101261 3.0244e-08  
q 1.938355306647625 6.9469e-08 au
tp 2457683.853391531795
(2016-Oct-22.35339153)
4.9795e-05 TDB
node 86.58868798746873 3.9338e-05 deg
peri 12.87792565013339 4.2316e-05 deg
i 5.28131415797238 3.5296e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      962  
   data-arc span      7797 days (21.35 yr)  
   first obs. used      1999-11-16  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49244  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 08:35:21  

Additional Information
 Jupiter MOID = 2.58101 au 
 T_jup = 3.611 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.14707719181987E-16 -2.092893049724052E-15 7.579511113265831E-15 -3.796910795357787E-15 2.047989984608225E-14 -1.024952561230014E-15
q -2.092893049724052E-15 4.825974411839317E-15 -9.369337843773739E-14 7.772781686515537E-15 -7.339604740453019E-14 2.408351404474677E-15
tp 7.579511113265831E-15 -9.369337843773739E-14 2.479541295468754E-9 2.128027819946318E-11 7.870867493312558E-10 -4.70638728667293E-13
node -3.796910795357787E-15 7.772781686515537E-15 2.128027819946318E-11 1.547515000656209E-9 -1.533840767963159E-9 -1.655822577261041E-11
peri 2.047989984608225E-14 -7.339604740453019E-14 7.870867493312558E-10 -1.533840767963159E-9 1.790670353619857E-9 1.63205448016908E-11
i -1.024952561230014E-15 2.408351404474677E-15 -4.70638728667293E-13 -1.655822577261041E-11 1.63205448016908E-11 1.24580642947441E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.99   n/a E2021B55  
diameter diameter 4.159 km 0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.055   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

102993 (1999 XL91)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1999 XL91 = 2002 TO85 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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