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216933 (1998 YP21)
Classification: Main-belt Asteroid          SPK-ID: 2216933
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1371337503229641 7.1123e-08  
a 2.778046509932259 2.205e-08 au
q 2.397082573453627 1.874e-07 au
i 12.85990564449962 3.1442e-06 deg
node 297.3408466614354 3.3769e-05 deg
peri 351.7787701935479 4.5831e-05 deg
M 99.24086831162036 3.5743e-05 deg
tp 2458734.274793269307
(2019-Sep-07.77479327)
0.00016571 TDB
period 1691.249555536149
4.63
2.0136e-05
5.513e-08
d
yr
n .2128603663614121 2.5343e-09 deg/d
Q 3.159010446410892 2.5074e-08 au
  Orbit Determination Parameters
   # obs. used (total)      477  
   data-arc span      8049 days (22.04 yr)  
   first obs. used      1998-12-26  
   last obs. used      2021-01-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48463  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:56:51  

Additional Information
 Earth MOID = 1.37958 au 
 Jupiter MOID = 2.04585 au 
 T_jup = 3.284 
[ 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 15.80   n/a MPCxxxxx  
diameter diameter 4.713 km 0.144 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.038   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

216933 (1998 YP21)          Discovered 1998-Dec-26 by Spacewatch at Kitt Peak
Reference: 20090806/Numbers.arcLast Updated: 2009-08-09

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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