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21569 (1998 RX12)
Classification: Main-belt Asteroid          SPK-ID: 2021569
[ 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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1251343182809005 4.2186e-08  
a 3.149669610561463 1.8734e-08 au
q 2.755537851033784 1.3217e-07 au
i .6836384997450931 4.8158e-06 deg
node 179.0029499669549 0.00027026 deg
peri 4.953208691263558 0.00027062 deg
M 173.9509446534651 1.6333e-05 deg
tp 2458213.947462528412
(2018-Apr-05.44746253)		 8.7904e-05 TDB
period 2041.718797200547
5.59		 1.8216e-05
4.987e-08		 d
yr
n .1763220285249885 1.5731e-09 deg/d
Q 3.543801370089141 2.1078e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1334  
   data-arc span      9482 days (25.96 yr)  
   first obs. used      1995-01-27  
   last obs. used      2021-01-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52431  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:48:41  

Additional Information
 Earth MOID = 1.75713 au 
 Jupiter MOID = 1.41449 au 
 T_jup = 3.196 
[ 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 13.85   n/a E2021B10  

21569 (1998 RX12)          Discovered 1998-Sep-14 by Spacewatch at Kitt Peak
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1998 RX12 = 1995 BZ2 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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