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181903 (1999 RE237)
Classification: Main-belt Asteroid          SPK-ID: 2181903
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1269172180905171 3.3963e-08  
a 2.313277612416807 1.1405e-08 au
q 2.019682853177792 8.2392e-08 au
i 10.09139488953991 4.7062e-06 deg
node 139.2896439538509 2.3437e-05 deg
peri 290.5727285335236 3.2956e-05 deg
M 318.4568647839281 2.3374e-05 deg
tp 2459348.798523642077
(2021-May-14.29852364)
8.3583e-05 TDB
period 1285.109278186922
3.52
9.5037e-06
2.602e-08
d
yr
n .2801318192238881 2.0716e-09 deg/d
Q 2.606872371655822 1.2852e-08 au
  Orbit Determination Parameters
   # obs. used (total)      531  
   data-arc span      7796 days (21.34 yr)  
   first obs. used      1999-09-08  
   last obs. used      2021-01-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56255  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:32  

Additional Information
 Earth MOID = 1.05913 au 
 Jupiter MOID = 2.64841 au 
 T_jup = 3.552 
[ 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 16.37   n/a E2021B55  

181903 (1999 RE237)          Discovered 1999-Sep-08 by CSS at Catalina
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2014-Sep-12 17:04 < 00:01 Iris 0.0361401633314104 0.0361364905110999 0.0361438363095151 5.79136215627286 5.79136212880643 2456913.211389837 0.668110307742602 220.777280932338 47.8758950340616 34.9110957998526 67657.4173645151 T 22 CATAB v2.0f-lin.ifort 2021-Apr-13 21:32:33 2021-Apr-13 21:32
2092-Feb-13 08:33 00:02 Iris 0.0193426230098788 0.0193380437819539 0.0193472275980289 5.68875282396109 5.68875277171659 2485190.856336643 1.5523706288821 1149.85715034886 45.716223954417 78.7414746354265 62060.3651450646 T 22 CATAB v2.0f-lin.ifort 2021-Apr-13 21:32:33 2021-Apr-13 21:32
2169-Jul-15 15:29 00:03 Iris 0.0461637151201089 0.0461205275653708 0.046206903979521 5.52111731651916 5.52111729396404 2513467.145063582 2.559478522158 2187.43693711669 41.8613637497898 -10.1854409545133 29327.3061219252 T 22 CATAB v2.0f-lin.ifort 2021-Apr-13 21:32:33 2021-Apr-13 21:32
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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