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399307 (1991 RJ2)
Classification: Amor [NEO]          SPK-ID: 2399307
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 62 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4276982152349026 5.2287e-08  
a 2.209084273351439 4.8432e-09 au
q 1.264262872335537 1.155e-07 au
i 8.947483502830734 7.5083e-06 deg
node 171.7733778708338 1.6354e-05 deg
peri 150.9451922136811 2.3189e-05 deg
M 36.00321674744384 7.9909e-06 deg
tp 2459276.562316381677
(2021-Mar-03.06231638)
2.6484e-05 TDB
period 1199.269676525834
3.28
3.9439e-06
1.08e-08
d
yr
n .3001826920554555 9.8717e-10 deg/d
Q 3.153905674367341 6.9146e-09 au
  Orbit Determination Parameters
   # obs. used (total)      217  
   data-arc span      10424 days (28.54 yr)  
   first obs. used      1991-09-08  
   last obs. used      2020-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42373  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 11:54:41  

Additional Information
 Earth MOID = .263773 au 
 Jupiter MOID = 2.23623 au 
 T_jup = 3.519 
[ 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 18.89   n/a E2021B25  
rotation period rot_per 3.4807 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Warner, B.D.; Pollock, J.T.; Reichart, D.E.; Haislip, J.B.; LaCluyze, A.P.; Verveer, A.; Spuck, T.; Harris, A.W. (2015) Minor Planet Bull. 42, 37-38.]

399307 (1991 RJ2)          Discovered 1991-Sep-08 by Helin, E. F. at Palomar
Reference: Last Updated: 2014-07-14

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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