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385204 (1999 SY23)
Classification: Inner Main-belt Asteroid          SPK-ID: 2385204
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04819614121062014 1.4631e-07  
a 1.918211424034526 1.3199e-08 au
q 1.825761035369933 2.8758e-07 au
i 19.69530241309701 8.519e-06 deg
node 15.97335616811261 1.5129e-05 deg
peri 186.1202891111701 5.813e-05 deg
M 170.5067416401241 5.9366e-05 deg
tp 2458740.897702540248
(2019-Sep-14.39770254)
0.00015869 TDB
period 970.3829038896788
2.66
1.0016e-05
2.742e-08
d
yr
n .3709875746542705 3.8292e-09 deg/d
Q 2.010661812699119 1.3835e-08 au
  Orbit Determination Parameters
   # obs. used (total)      221  
   data-arc span      7747 days (21.21 yr)  
   first obs. used      1999-09-30  
   last obs. used      2020-12-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55552  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 11:04:31  

Additional Information
 Earth MOID = .82372 au 
 Jupiter MOID = 2.94424 au 
 T_jup = 3.855 
[ 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 17.53   n/a MPCxxxxx  

385204 (1999 SY23)          Discovered 1999-Sep-30 by Spacewatch at Kitt Peak
Reference: Last Updated: 2014-02-19

Alternate Designations
 1999 SY23 = 2007 TX72 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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