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49956 (1999 XZ220)
Classification: Main-belt Asteroid          SPK-ID: 2049956
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1672947244319994 3.905e-08  
a 2.311737438259401 8.9298e-09 au
q 1.924995960566658 8.8275e-08 au
i 9.63857953013118 4.4184e-06 deg
node 225.5959022934168 2.0741e-05 deg
peri 325.4658792690279 2.3555e-05 deg
M 243.8473937550511 1.2844e-05 deg
tp 2459414.721507312982
(2021-Jul-19.22150731)
4.6736e-05 TDB
period 1283.826058265123
3.51
7.4387e-06
2.037e-08
d
yr
n .2804118187836755 1.6248e-09 deg/d
Q 2.698478915952144 1.0424e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1392  
   data-arc span      8069 days (22.09 yr)  
   first obs. used      1998-09-26  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51016  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:29:55  

Additional Information
 Earth MOID = .931622 au 
 Jupiter MOID = 2.29065 au 
 T_jup = 3.547 
[ 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 14.8   n/a MPO449321  
diameter diameter 5.294 km 0.082 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.086   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49956 (1999 XZ220)          Discovered 1999-Dec-14 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XZ220 = 1998 SE100 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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