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102981 (1999 XC78)
Classification: Main-belt Asteroid          SPK-ID: 2102981
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1947250439164064 4.6379e-08  
a 2.253406960286077 7.3361e-09 au
q 1.814612190982835 1.0301e-07 au
i 7.278811364123621 4.5327e-06 deg
node 69.59047014404629 3.777e-05 deg
peri 265.0449384260516 4.0099e-05 deg
M 154.1315128347445 1.2665e-05 deg
tp 2458671.510789128835
(2019-Jul-07.01078913)
4.2741e-05 TDB
period 1235.543026933108
3.38
6.0336e-06
1.652e-08
d
yr
n .2913698609862256 1.4229e-09 deg/d
Q 2.692201729589319 8.7646e-09 au
  Orbit Determination Parameters
   # obs. used (total)      547  
   data-arc span      7747 days (21.21 yr)  
   first obs. used      1999-11-09  
   last obs. used      2021-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5181  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:32:57  

Additional Information
 Earth MOID = .820631 au 
 Jupiter MOID = 2.70051 au 
 T_jup = 3.590 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.4   n/a MPO502731  
diameter diameter 1.697 km 0.501 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.223   0.207 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

102981 (1999 XC78)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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