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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08574745353873829 2.3983e-08  
a 2.800535155070532 1.1574e-08 au
q 2.560396396977519 6.9343e-08 au
i 8.90708295266286 9.1848e-07 deg
node 198.1872981447673 5.2762e-06 deg
peri 17.86215399946819 1.2153e-05 deg
M 349.3501510140854 7.7797e-06 deg
tp 2459251.140842083236
(2021-Feb-05.64084208)
3.6991e-05 TDB
period 1711.82738591661
4.69
1.0612e-05
2.905e-08
d
yr
n .2103015776951339 1.3037e-09 deg/d
Q 3.040673913163547 1.2567e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2727  
   data-arc span      12924 days (35.38 yr)  
   first obs. used      1985-10-18  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43051  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:03:03  

Additional Information
 Earth MOID = 1.55471 au 
 Jupiter MOID = 1.92312 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 12.89   n/a E2021B10  
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. 2020-October); 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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