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19698 (1999 SR4)
Classification: Main-belt Asteroid          SPK-ID: 2019698
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08591797536281831 3.5653e-08  
a 2.801140951408203 1.2314e-08 au
q 2.560472592157331 1.033e-07 au
i 8.906130013531341 3.9627e-06 deg
node 198.1901050729683 2.1933e-05 deg
peri 17.78506859486816 3.0561e-05 deg
M 307.3720455583319 2.1782e-05 deg
tp 2459250.831130302839
(2021-Feb-05.33113030)
0.00010406 TDB
period 1712.382855558418
4.69
1.1292e-05
3.092e-08
d
yr
n .2102333592230471 1.3863e-09 deg/d
Q 3.041809310659075 1.3372e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2575  
   data-arc span      12652 days (34.64 yr)  
   first obs. used      1985-10-18  
   last obs. used      2020-06-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43343  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:07:06  

Additional Information
 Earth MOID = 1.5558 au 
 Jupiter MOID = 1.92307 au 
 T_jup = 3.302 
[ 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 12.9   n/a MPO459003  
diameter diameter 7.115 km 0.275 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.381 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.318   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19698 (1999 SR4)          Discovered 1999-Sep-29 by Korlevic, K. at Visnjan
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 SR4 = 1985 UV6 = 1990 WU15 = 1994 SM10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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