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91552 (1999 RG213)
Classification: Main-belt Asteroid          SPK-ID: 2091552
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1618969294078818 7.2699e-08  
a 2.881065958571122 2.2857e-08 au
q 2.414630226456882 2.0218e-07 au
i .9948672622538158 7.5202e-06 deg
node .7734228554825278 0.00031739 deg
peri 307.1869835183422 0.00031994 deg
M 121.4547094000256 4.9402e-05 deg
tp 2458397.884793015803
(2018-Oct-06.38479302)
0.00024097 TDB
period 1786.192364100006
4.89
2.1256e-05
5.82e-08
d
yr
n .2015460413085968 2.3984e-09 deg/d
Q 3.347501690685363 2.6557e-08 au
  Orbit Determination Parameters
   # obs. used (total)      360  
   data-arc span      21614 days (59.18 yr)  
   first obs. used      1960-09-24  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56314  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 08:48:36  

Additional Information
 Earth MOID = 1.40005 au 
 Jupiter MOID = 1.90669 au 
 T_jup = 3.274 
[ 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 16.0   n/a MPO320103  
rotation period rot_per 2.51 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]

91552 (1999 RG213)          Discovered 1999-Sep-08 by Bickel, W. at Bergisch Gladbach
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 RG213 = 1994 PJ40 = 1999 TP252 = 1999 UB63 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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