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74546 (1999 JR61)
Classification: Main-belt Asteroid          SPK-ID: 2074546
[ 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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1499493798553397 2.9337e-08  
a 2.186029747996581 7.4685e-09 au
q 1.858235942939169 6.3421e-08 au
i 3.115072008107442 6.59e-06 deg
node 230.5550884757911 6.8312e-05 deg
peri 63.31659458350504 7.2417e-05 deg
M 144.1742969193307 2.4854e-05 deg
tp 2458527.710448988642
(2019-Feb-13.21044899)		 8.0809e-05 TDB
period 1180.544951499383
3.23		 6.0499e-06
1.656e-08		 d
yr
n .3049439155559238 1.5627e-09 deg/d
Q 2.513823553053993 8.5884e-09 au
   Orbit Determination Parameters
   # obs. used (total)      899  
   data-arc span      10193 days (27.91 yr)  
   first obs. used      1992-02-29  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52525  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 17:18:40  

Additional Information
 Earth MOID = .844722 au 
 Jupiter MOID = 2.65453 au 
 T_jup = 3.660 
[ 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 16.1   n/a MPO502608  
diameter diameter 2.721 km 0.555 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.087   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

74546 (1999 JR61)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 JR61 = 1992 DO9 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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