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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1116289449529758 4.4493e-08  
a 2.354589418794394 1.0495e-08 au
q 2.091749086176935 1.0238e-07 au
i 4.224328488534456 4.3561e-06 deg
node 292.1884176976499 6.0194e-05 deg
peri 239.6508026572048 6.2848e-05 deg
M 56.82365355345705 1.9036e-05 deg
tp 2458392.195878977638
(2018-Sep-30.69587898)
6.9467e-05 TDB
period 1319.687821507353
3.61
8.8232e-06
2.416e-08
d
yr
n .2727917876735472 1.8238e-09 deg/d
Q 2.617429751411853 1.1666e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1274  
   data-arc span      14229 days (38.96 yr)  
   first obs. used      1980-09-04  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54088  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 02:17:16  

Additional Information
 Earth MOID = 1.10173 au 
 Jupiter MOID = 2.37003 au 
 T_jup = 3.543 
[ 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 14.8   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

[ 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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