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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1633570106665881 4.96e-08  
a 3.202701160747593 2.5979e-08 au
q 2.679517473069454 1.602e-07 au
i 17.86319043020244 7.2011e-06 deg
node 222.869329716752 1.5564e-05 deg
peri 292.2184179225045 2.5492e-05 deg
M 233.1110468345751 2.0764e-05 deg
tp 2459338.394658123749
(2021-May-03.89465812)
0.00012485 TDB
period 2093.500421413616
5.73
2.5472e-05
6.974e-08
d
yr
n .1719607965289605 2.0923e-09 deg/d
Q 3.725884848425731 3.0222e-08 au
  Orbit Determination Parameters
   # obs. used (total)      972  
   data-arc span      8870 days (24.28 yr)  
   first obs. used      1995-08-22  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53049  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:22:55  

Additional Information
 Earth MOID = 1.74579 au 
 Jupiter MOID = 1.55058 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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