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JPL Small-Body Database Browser
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49639 (1999 JJ17)
Classification: Main-belt Asteroid          SPK-ID: 2049639
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1879116167678062 3.8193e-08  
a 3.146275368065296 2.2448e-08 au
q 2.555053676855422 1.245e-07 au
i 14.58050497135562 4.5883e-06 deg
node 91.95776723719466 2.3237e-05 deg
peri 5.083180966904384 2.8252e-05 deg
M 335.7080233422259 1.585e-05 deg
tp 2458738.047872246502
(2019-Sep-11.54787225)
9.0026e-05 TDB
period 2038.419298122194
5.58
2.1815e-05
5.973e-08
d
yr
n .1766074331868985 1.8901e-09 deg/d
Q 3.737497059275171 2.6666e-08 au
  Orbit Determination Parameters
   # obs. used (total)      969  
   data-arc span      8458 days (23.16 yr)  
   first obs. used      1996-10-10  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52327  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:22:55  

Additional Information
 Earth MOID = 1.57227 au 
 Jupiter MOID = 1.47681 au 
 T_jup = 3.132 
[ 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 13.6   n/a MPO324754  
diameter diameter 8.088 km 0.388 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.107   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49639 (1999 JJ17)          Discovered 1999-May-15 by Spacewatch at Kitt Peak
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 JJ17 = 1998 GH2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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