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56341 (1999 XS221)
Classification: Outer Main-belt Asteroid          SPK-ID: 2056341
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ 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 .05558424966639686 4.6306e-08  
a 3.501335915086398 3.3688e-08 au
q 3.306716785416314 1.6252e-07 au
i 10.65873015424416 5.8888e-06 deg
node 49.11245817541743 2.9421e-05 deg
peri 244.5896263223976 6.5595e-05 deg
M 185.1936883057498 6.0533e-05 deg
tp 2460162.493513015136
(2023-Aug-05.99351302)
0.00040243 TDB
period 2393.03524358502
6.55
3.4537e-05
9.456e-08
d
yr
n .1504365641772504 2.1712e-09 deg/d
Q 3.695955044756483 3.5561e-08 au
  Orbit Determination Parameters
   # obs. used (total)      910  
   data-arc span      10022 days (27.44 yr)  
   first obs. used      1992-11-26  
   last obs. used      2020-05-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56383  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 22:59:46  

Additional Information
 Earth MOID = 2.30951 au 
 Jupiter MOID = 1.42524 au 
 T_jup = 3.096 
[ 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 13.6   n/a MPO337705  
diameter diameter 12.354 km 0.178 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.020   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

56341 (1999 XS221)          Discovered 1999-Dec-15 by LINEAR at Socorro
Reference: 20030318/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XS221 = 2002 GU7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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