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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1125805950118165 4.3042e-08  
a 2.353217886667565 8.9253e-09 au
q 2.088291216794081 1.0013e-07 au
i 4.226431586914151 3.5229e-06 deg
node 292.1787435791708 5.9775e-05 deg
peri 239.4328170690389 6.1856e-05 deg
M 220.7583837175411 1.8708e-05 deg
tp 2459710.485928326280
(2022-May-10.98592833)
7.0072e-05 TDB
period 1318.534925830141
3.61
7.5014e-06
2.054e-08
d
yr
n .2730303103449051 1.5533e-09 deg/d
Q 2.618144556541049 9.9301e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1564  
   data-arc span      14733 days (40.34 yr)  
   first obs. used      1980-09-04  
   last obs. used      2021-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51359  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 05:03:11  

Additional Information
 Earth MOID = 1.09751 au 
 Jupiter MOID = 2.36712 au 
 T_jup = 3.544 
[ 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 14.88   n/a E2021B10  
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

[ show close-approach data ]
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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