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102984 (1999 XJ81)
Classification: Main-belt Asteroid          SPK-ID: 2102984
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .201964132938963 3.2317e-08  
a 2.375746078660691 8.5831e-09 au
q 1.895930581800843 7.8875e-08 au
i 4.992830218816085 4.4316e-06 deg
node 257.771972578044 4.2262e-05 deg
peri 73.97077037205702 4.4481e-05 deg
M 353.7361936287711 1.2439e-05 deg
tp 2459223.772030743607
(2021-Jan-09.27203074)
4.6272e-05 TDB
period 1337.514375632715
3.66
7.2483e-06
1.984e-08
d
yr
n .2691559855793706 1.4586e-09 deg/d
Q 2.855561575520539 1.0317e-08 au
  Orbit Determination Parameters
   # obs. used (total)      663  
   data-arc span      8120 days (22.23 yr)  
   first obs. used      1998-05-24  
   last obs. used      2020-08-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49988  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:51:22  

Additional Information
 Earth MOID = .890782 au 
 Jupiter MOID = 2.52293 au 
 T_jup = 3.509 
[ show covariance matrix ]

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 15.92   n/a E2021B55  

102984 (1999 XJ81)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 XJ81 = 2002 NS44 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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