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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08591797634252352 3.5781e-08  
a 2.801140951719927 1.2345e-08 au
q 2.560472589697981 1.0359e-07 au
i 8.906129993073391 3.981e-06 deg
node 198.1901050175216 2.1994e-05 deg
peri 17.78506878369102 3.0602e-05 deg
M 307.3720453017816 2.1792e-05 deg
tp 2459250.831131564938
(2021-Feb-05.33113156)
0.00010411 TDB
period 1712.382855844261
4.69
1.132e-05
3.099e-08
d
yr
n .2102333591879535 1.3898e-09 deg/d
Q 3.041809313741874 1.3406e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2512  
   data-arc span      12611 days (34.53 yr)  
   first obs. used      1985-10-18  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43498  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 05:04:26  

Additional Information
 Earth MOID = 1.5558 au 
 Jupiter MOID = 1.92307 au 
 T_jup = 3.302 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457062.5 (2015-Feb-09.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08763577076507406 3.5619e-08  
q 2.555680254720526 1.0347e-07 au
tp 2457537.363802222885
(2016-May-28.86380222)
9.9731e-05 TDB
node 198.2708693641564 2.2028e-05 deg
peri 17.62406665742631 3.0386e-05 deg
i 8.898732276993558 3.9788e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2512  
   data-arc span      12611 days (34.53 yr)  
   first obs. used      1985-10-18  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43498  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 05:04:26  

Additional Information
 Jupiter MOID = 1.92307 au 
 T_jup = 3.302 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.268736434855793E-15 -3.665102406731898E-15 -7.2791672413317E-13 -3.05505975419766E-15 -1.194187828687062E-13 -3.500787177624351E-16
q -3.665102406731898E-15 1.070563335665725E-14 2.249699695745941E-12 9.49565562998014E-15 3.681769254586807E-13 1.107330767281435E-15
tp -7.2791672413317E-13 2.249699695745941E-12 9.946238238533661E-9 6.06030013713396E-13 2.095884602315091E-9 3.458836228739749E-12
node -3.05505975419766E-15 9.49565562998014E-15 6.06030013713396E-13 4.852395677765206E-10 -4.791721562908499E-10 -8.471250833240593E-12
peri -1.194187828687062E-13 3.681769254586807E-13 2.095884602315091E-9 -4.791721562908499E-10 9.23326002877105E-10 9.087543153772512E-12
i -3.500787177624351E-16 1.107330767281435E-15 3.458836228739749E-12 -8.471250833240593E-12 9.087543153772512E-12 1.583084912861207E-11

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

[ show close-approach data ]
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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