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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1615644930396269 1.8793e-08  
a 2.575193054461933 9.1733e-09 au
q 2.159133294138622 5.1454e-08 au
i 16.34903400670909 5.184e-07 deg
node 135.8368541638873 1.3741e-06 deg
peri 204.6647159367091 4.9754e-06 deg
M 338.273870692227 7.1188e-06 deg
tp 2459291.594671620156
(2021-Mar-18.09467162)
3.0071e-05 TDB
period 1509.430479709202
4.13
8.0653e-06
2.208e-08
d
yr
n .2385005502667175 1.2744e-09 deg/d
Q 2.991252814785244 1.0655e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2342  
   data-arc span      12685 days (34.73 yr)  
   first obs. used      1986-03-04  
   last obs. used      2020-11-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42336  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:57:53  

Additional Information
 Earth MOID = 1.15588 au 
 Jupiter MOID = 2.39505 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 12.84   n/a E2021B10  
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. 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.]
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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