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15225 (1985 RJ4)
Classification: Main-belt Asteroid          SPK-ID: 2015225
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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .202904941684233 4.0177e-08  
a 3.12554381910057 1.5055e-08 au
q 2.491355532754453 1.2603e-07 au
i 2.248699844980774 3.9625e-06 deg
node 33.50001472998472 0.00010971 deg
peri 314.6077993853763 0.00011001 deg
M 145.927602255763 8.5845e-06 deg
tp 2458382.371050141745
(2018-Sep-20.87105014)
4.7503e-05 TDB
period 2018.305086879751
5.53
1.4583e-05
3.993e-08
d
yr
n .1783674838557489 1.2887e-09 deg/d
Q 3.759732105446686 1.811e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1769  
   data-arc span      16971 days (46.46 yr)  
   first obs. used      1974-09-19  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51862  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 00:52:12  

Additional Information
 Earth MOID = 1.48378 au 
 Jupiter MOID = 1.66911 au 
 T_jup = 3.181 
[ 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 13.68   n/a E2021B10  
diameter diameter 10.382 km 0.372 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.086   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15225 (1985 RJ4)          Discovered 1985-Sep-11 by Debehogne, H. at La Silla
Reference: 20000621/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1985 RJ4 = 1974 SD1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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