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21788 (1999 SZ5)
Classification: Mars-crossing Asteroid          SPK-ID: 2021788
[ 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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3209036256359226 1.2674e-08  
a 2.42735824273772 7.7592e-09 au
q 1.648410181925944 2.9695e-08 au
i 22.59909743536911 1.0687e-06 deg
node 161.2894650828846 1.4558e-06 deg
peri 239.770703097945 2.0533e-06 deg
M 209.541165386476 3.1797e-06 deg
tp 2459777.817117632814
(2022-Jul-17.31711763)		 1.4638e-05 TDB
period 1381.335718049833
3.78		 6.6233e-06
1.813e-08		 d
yr
n .2606173106913122 1.2496e-09 deg/d
Q 3.206306303549497 1.0249e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1796  
   data-arc span      11643 days (31.88 yr)  
   first obs. used      1989-03-02  
   last obs. used      2021-01-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48749  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:53:25  

Additional Information
 Earth MOID = .743854 au 
 Jupiter MOID = 2.52281 au 
 T_jup = 3.338 
[ 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 14.1   n/a MPO347690  
diameter diameter 3.324 km 0.676 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.370   0.156 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

21788 (1999 SZ5)          Discovered 1999-Sep-30 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 SZ5 = 1989 EQ3 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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