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JPL Small-Body Database Browser
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16475 (1990 QS4)
Classification: Main-belt Asteroid          SPK-ID: 2016475
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1172982846551062 3.7007e-08  
a 2.216831285257795 7.8728e-09 au
q 1.956800778127281 8.4331e-08 au
i 5.521007903023345 3.8964e-06 deg
node 107.6650155422675 3.9616e-05 deg
peri 211.9249475296743 4.3172e-05 deg
M 260.823399476459 1.9011e-05 deg
tp 2458932.626941960520
(2020-Mar-24.12694196)
6.4356e-05 TDB
period 1205.583761437825
3.30
6.4222e-06
1.758e-08
d
yr
n .2986105250543937 1.5907e-09 deg/d
Q 2.476861792388309 8.7963e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1757  
   data-arc span      23516 days (64.38 yr)  
   first obs. used      1954-12-22  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48304  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:25:36  

Additional Information
 Earth MOID = .945021 au 
 Jupiter MOID = 2.76823 au 
 T_jup = 3.638 
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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 14.4   n/a MPO473987  
diameter diameter 4.383 km 1.281 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.192   0.085 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

16475 (1990 QS4)          Discovered 1990-Aug-24 by Holt, H. E. at Palomar
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1990 QS4 = 1998 DN32 = 1999 GB18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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