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JPL Small-Body Database Browser
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17948 (1999 JQ15)
Classification: Main-belt Asteroid          SPK-ID: 2017948
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .207854168555069 4.4521e-08  
a 2.402199849430275 7.5625e-09 au
q 1.902892597023834 1.0533e-07 au
i 5.036565938472944 4.6652e-06 deg
node 157.3463107396614 3.8833e-05 deg
peri 154.6713604700179 3.966e-05 deg
M 185.8712820614241 9.0984e-06 deg
tp 2459658.279041522740
(2022-Mar-19.77904152)
3.567e-05 TDB
period 1359.916145662532
3.72
6.4219e-06
1.758e-08
d
yr
n .2647222044890225 1.2501e-09 deg/d
Q 2.901507101836717 9.1345e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2077  
   data-arc span      25575 days (70.02 yr)  
   first obs. used      1950-04-12  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50414  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:43:09  

Additional Information
 Earth MOID = .89033 au 
 Jupiter MOID = 2.39004 au 
 T_jup = 3.490 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456894.5 (2014-Aug-25.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2090515764148262 4.4595e-08  
q 1.899548310795139 1.0563e-07 au
tp 2456938.678102363946
(2014-Oct-08.17810236)
3.1714e-05 TDB
node 157.3893130118825 3.8804e-05 deg
peri 154.6366904955605 3.9619e-05 deg
i 5.038370281003334 4.6689e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2077  
   data-arc span      25575 days (70.02 yr)  
   first obs. used      1950-04-12  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50414  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:43:09  

Additional Information
 Jupiter MOID = 2.39004 au 
 T_jup = 3.490 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.988683062197912E-15 -4.703512474297751E-15 4.062752884037237E-13 -2.286039169652367E-15 8.042845566273961E-14 -7.048362205320109E-16
q -4.703512474297751E-15 1.115680949053129E-14 -9.571430299844721E-13 4.983623649539762E-15 -1.901410104306849E-13 1.792211087732427E-15
tp 4.062752884037237E-13 -9.571430299844721E-13 1.005795916988906E-9 -4.456826966847098E-12 2.62745936158952E-10 -7.767984093229095E-13
node -2.286039169652367E-15 4.983623649539762E-15 -4.456826966847098E-12 1.50572911482463E-9 -1.50030011471273E-9 -2.689800675614269E-11
peri 8.042845566273961E-14 -1.901410104306849E-13 2.62745936158952E-10 -1.50030011471273E-9 1.569693180872554E-9 2.660922491469158E-11
i -7.048362205320109E-16 1.792211087732427E-15 -7.767984093229095E-13 -2.689800675614269E-11 2.660922491469158E-11 2.179850853376905E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.0   n/a MPO502305  
diameter diameter 3.149 km 0.165 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.590   0.109 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17948 (1999 JQ15)          Discovered 1999-May-12 by Okuni, T. at Nanyo
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 JQ15 = 1977 RQ1 = 1991 EJ3 = 1992 SF20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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