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49856 (1999 XC99)
Classification: Main-belt Asteroid          SPK-ID: 2049856
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1124397483782724 4.3113e-08  
a 2.353466030861186 9.0224e-09 au
q 2.088842902534343 1.0029e-07 au
i 4.226414954227725 3.5551e-06 deg
node 292.1785931294521 5.9812e-05 deg
peri 239.4868591083443 6.1904e-05 deg
M 166.0862724154864 1.8575e-05 deg
tp 2458392.096693731112
(2018-Sep-30.59669373)
6.637e-05 TDB
period 1318.743488377412
3.61
7.5834e-06
2.076e-08
d
yr
n .2729871299254304 1.5698e-09 deg/d
Q 2.618089159188029 1.0037e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1546  
   data-arc span      14681 days (40.19 yr)  
   first obs. used      1980-09-04  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51612  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:51:05  

Additional Information
 Earth MOID = 1.09841 au 
 Jupiter MOID = 2.36811 au 
 T_jup = 3.544 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456804.5 (2014-May-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1120683982803286 4.3066e-08  
q 2.090271683094983 1.0022e-07 au
tp 2457072.092325317876
(2015-Feb-18.59232532)
6.357e-05 TDB
node 292.2304513296236 5.9828e-05 deg
peri 239.4063412411946 6.1941e-05 deg
i 4.225458051415313 3.5533e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1546  
   data-arc span      14681 days (40.19 yr)  
   first obs. used      1980-09-04  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51612  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:51:05  

Additional Information
 Jupiter MOID = 2.36811 au 
 T_jup = 3.544 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.854688751666566E-15 -4.302944755651331E-15 2.881869668533015E-13 2.520903023449157E-15 9.879210449618582E-14 1.17818292570594E-15
q -4.302944755651331E-15 1.004422833784381E-14 -4.964970425070125E-13 -5.164431159432037E-15 -1.887362408978233E-13 -2.574041865566274E-15
tp 2.881869668533015E-13 -4.964970425070125E-13 4.041106665249762E-9 9.003694697520802E-12 1.042175171035819E-9 1.394876826366687E-12
node 2.520903023449157E-15 -5.164431159432037E-15 9.003694697520802E-12 3.579403162041279E-9 -3.567110566099256E-9 3.974893385918887E-11
peri 9.879210449618582E-14 -1.887362408978233E-13 1.042175171035819E-9 -3.567110566099256E-9 3.836678377598032E-9 -3.927037090915401E-11
i 1.17818292570594E-15 -2.574041865566274E-15 1.394876826366687E-12 3.974893385918887E-11 -3.927037090915401E-11 1.262628531044841E-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 MPO436132  
diameter diameter 3.982 km 0.549 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.027   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

49856 (1999 XC99)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 XC99 = 1980 RH1 = 1994 NW5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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