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49809 (1999 XC42)
Classification: Main-belt Asteroid          SPK-ID: 2049809
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1074868026003465 3.0791e-08  
a 2.267959255301835 8.0618e-09 au
q 2.024183566521578 6.7634e-08 au
i 5.216801172672128 4.0761e-06 deg
node 42.61537210241811 4.5309e-05 deg
peri 226.626301225489 5.1015e-05 deg
M 25.08492508095634 2.2747e-05 deg
tp 2458513.571615941661
(2019-Jan-30.07161594)
7.8841e-05 TDB
period 1247.530864055064
3.42
6.6518e-06
1.821e-08
d
yr
n .2885700148770911 1.5386e-09 deg/d
Q 2.511734944082093 8.9283e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1378  
   data-arc span      10447 days (28.60 yr)  
   first obs. used      1991-04-21  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53828  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:24:14  

Additional Information
 Earth MOID = 1.01209 au 
 Jupiter MOID = 2.55533 au 
 T_jup = 3.602 
[ 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 15.0   n/a MPO337656  
diameter diameter 2.154 km 0.370 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.458   0.236 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49809 (1999 XC42)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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