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49941 (1999 XN187)
Classification: Main-belt Asteroid          SPK-ID: 2049941
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09677989238275517 3.6684e-08  
a 2.235355097810619 7.8888e-09 au
q 2.019017672007264 8.115e-08 au
i 7.205624064981138 5.3827e-06 deg
node 344.0939744850172 2.6615e-05 deg
peri 51.11012624737979 3.8226e-05 deg
M 97.8456713103904 2.658e-05 deg
tp 2458668.714556897807
(2019-Jul-04.21455690)
8.9902e-05 TDB
period 1220.726046611587
3.34
6.4621e-06
1.769e-08
d
yr
n .2949064624280484 1.5611e-09 deg/d
Q 2.451692523613974 8.6522e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1161  
   data-arc span      9001 days (24.64 yr)  
   first obs. used      1995-09-25  
   last obs. used      2020-05-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53221  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:30:01  

Additional Information
 Earth MOID = 1.0327 au 
 Jupiter MOID = 2.8838 au 
 T_jup = 3.622 
[ 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 15.3   n/a MPO452849  
diameter diameter 1.921 km 0.267 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.331   0.065 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49941 (1999 XN187)          Discovered 1999-Dec-12 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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