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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .207959904388113 2.0411e-08  
a 2.40187456320991 7.0043e-09 au
q 1.902380958692536 4.8527e-08 au
i 5.037152686934619 4.8493e-07 deg
node 157.34551578284 1.262e-05 deg
peri 154.7099055207351 1.3715e-05 deg
M 238.7726374820394 4.5534e-06 deg
tp 2459658.348785904959
(2022-Mar-19.84878591)
1.8499e-05 TDB
period 1359.639931961446
3.72
5.9475e-06
1.628e-08
d
yr
n .2647759833595475 1.1582e-09 deg/d
Q 2.901368167727283 8.461e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2274  
   data-arc span      25913 days (70.95 yr)  
   first obs. used      1950-04-12  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50204  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:38:37  

Additional Information
 Earth MOID = .887837 au 
 Jupiter MOID = 2.39006 au 
 T_jup = 3.490 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457181.5 (2015-Jun-08.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2089849395922395 2.0393e-08  
q 1.899398156881085 4.853e-08 au
tp 2456938.573473712689
(2014-Oct-08.07347371)
1.3305e-05 TDB
node 157.3895282164109 1.2612e-05 deg
peri 154.592836755228 1.3692e-05 deg
i 5.038672581552619 4.8494e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2274  
   data-arc span      25913 days (70.95 yr)  
   first obs. used      1950-04-12  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50204  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:38:37  

Additional Information
 Jupiter MOID = 2.39006 au 
 T_jup = 3.490 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.158545644846005E-16 -9.834013000534474E-16 -1.664296368843968E-13 -1.504592699140248E-14 -5.191518427491149E-14 -3.281067884827456E-15
q -9.834013000534474E-16 2.355177875941786E-15 4.044361828969644E-13 3.580983799016271E-14 1.267320042416153E-13 7.817794301992877E-15
tp -1.664296368843968E-13 4.044361828969644E-13 1.770324223357055E-10 -2.710289799206478E-11 8.453893955522362E-11 2.643235421610598E-13
node -1.504592699140248E-14 3.580983799016271E-14 -2.710289799206478E-11 1.590745753741487E-10 -1.631719189793905E-10 3.235460450225334E-12
peri -5.191518427491149E-14 1.267320042416153E-13 8.453893955522362E-11 -1.631719189793905E-10 1.874745930245665E-10 -3.037905975095521E-12
i -3.281067884827456E-15 7.817794301992877E-15 2.643235421610598E-13 3.235460450225334E-12 -3.037905975095521E-12 2.351692316706959E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.98   n/a E2021B10  
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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