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JPL Small-Body Database Browser
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19557 (1999 JC79)
Classification: Main-belt Asteroid          SPK-ID: 2019557
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1616270700101857 3.676e-08  
a 2.574425998821403 1.1159e-08 au
q 2.158329067673854 9.3439e-08 au
i 16.34605293178742 4.3314e-06 deg
node 135.8443154177457 1.3495e-05 deg
peri 204.8225863333957 1.907e-05 deg
M 290.4322025012229 1.549e-05 deg
tp 2459292.057890283569
(2021-Mar-18.55789028)
6.5865e-05 TDB
period 1508.756123893818
4.13
9.8095e-06
2.686e-08
d
yr
n .238607150816997 1.5514e-09 deg/d
Q 2.990522929968952 1.2962e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1883  
   data-arc span      12389 days (33.92 yr)  
   first obs. used      1986-03-04  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45919  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:50:33  

Additional Information
 Earth MOID = 1.15711 au 
 Jupiter MOID = 2.39618 au 
 T_jup = 3.353 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.8   n/a MPO474023  
diameter diameter 8.379 km 0.268 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.139 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.]
geometric albedo albedo 0.229   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19557 (1999 JC79)          Discovered 1999-May-13 by LINEAR at Socorro
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 JC79 = 1998 CH5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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