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102998 (1999 XJ94)
Classification: Main-belt Asteroid          SPK-ID: 2102998
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 .1854051285688963 3.2359e-08  
a 2.636542820244219 1.624e-08 au
q 2.147714259679439 8.0075e-08 au
i 13.90193366136195 4.2368e-06 deg
node 107.2165876700475 1.4144e-05 deg
peri 273.0127771395339 2.0157e-05 deg
M 37.32350468136524 1.1728e-05 deg
tp 2459038.382242736355
(2020-Jul-07.88224274)
5.1326e-05 TDB
period 1563.690042324756
4.28
1.4447e-05
3.955e-08
d
yr
n .2302246546667164 2.1271e-09 deg/d
Q 3.125371380808999 1.925e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1108  
   data-arc span      7743 days (21.20 yr)  
   first obs. used      1999-12-07  
   last obs. used      2021-02-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48172  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:44:36  

Additional Information
 Earth MOID = 1.20238 au 
 Jupiter MOID = 2.48565 au 
 T_jup = 3.332 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457553.5 (2016-Jun-14.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1878141543457685 3.2624e-08  
q 2.140668185209824 8.0965e-08 au
tp 2457472.735337825023
(2016-Mar-25.23533783)
5.5246e-05 TDB
node 107.3295569710169 1.4184e-05 deg
peri 272.5359582005257 1.9952e-05 deg
i 13.88626996796244 4.2324e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1108  
   data-arc span      7743 days (21.20 yr)  
   first obs. used      1999-12-07  
   last obs. used      2021-02-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48172  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:44:36  

Additional Information
 Jupiter MOID = 2.48565 au 
 T_jup = 3.332 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.064349434965284E-15 -2.614322679740484E-15 3.353776585768008E-14 -4.242840965117783E-15 2.414233378705991E-14 -1.872591607874515E-15
q -2.614322679740484E-15 6.555296374624856E-15 -4.389313316633821E-13 1.249623651099439E-14 -1.45312267775041E-13 4.932644244413025E-15
tp 3.353776585768008E-14 -4.389313316633821E-13 3.052113917857213E-9 -1.958928602377387E-11 7.850239963254884E-10 -2.986537163007692E-12
node -4.242840965117783E-15 1.249623651099439E-14 -1.958928602377387E-11 2.0119732267419E-10 -1.998943383279166E-10 -1.690037374737124E-11
peri 2.414233378705991E-14 -1.45312267775041E-13 7.850239963254884E-10 -1.998943383279166E-10 3.980753705689723E-10 1.558341385881314E-11
i -1.872591607874515E-15 4.932644244413025E-15 -2.986537163007692E-12 -1.690037374737124E-11 1.558341385881314E-11 1.791330154600404E-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 14.8   n/a MPO436483  
diameter diameter 3.285 km 0.663 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.198   0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

102998 (1999 XJ94)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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