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49648 (1999 JR45)
Classification: Outer Main-belt Asteroid          SPK-ID: 2049648
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1631234423611627 4.8069e-08  
a 3.203830079886417 2.5015e-08 au
q 2.681210288515105 1.5675e-07 au
i 17.85927698733805 7.0121e-06 deg
node 222.8686287603709 1.4928e-05 deg
peri 292.0980391318495 2.4888e-05 deg
M 301.9812162806875 2.0418e-05 deg
tp 2459338.073819898454
(2021-May-03.57381990)
0.00012052 TDB
period 2094.607424922479
5.73
2.4531e-05
6.716e-08
d
yr
n .1718699149619044 2.0129e-09 deg/d
Q 3.726449871257728 2.9095e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1051  
   data-arc span      9201 days (25.19 yr)  
   first obs. used      1995-08-22  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5272  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:31:33  

Additional Information
 Earth MOID = 1.74719 au 
 Jupiter MOID = 1.54967 au 
 T_jup = 3.098 
[ 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 13.8   n/a MPO365831  
diameter diameter 9.546 km 0.255 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.059   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49648 (1999 JR45)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 JR45 = 1995 QT1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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