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19555 (1999 JO77)
Classification: Main-belt Asteroid          SPK-ID: 2019555
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2007431702301503 3.2101e-08  
a 2.570590807915679 1.0541e-08 au
q 2.054562259770202 8.7676e-08 au
i 8.204814800503827 8.9431e-07 deg
node 144.8917050347944 8.3417e-06 deg
peri 226.3653421912863 8.5559e-06 deg
M 329.2985123468308 1.0394e-05 deg
tp 2459328.882187503127
(2021-Apr-24.38218750)
4.4023e-05 TDB
period 1505.385928631209
4.12
9.2599e-06
2.535e-08
d
yr
n .2391413345595268 1.471e-09 deg/d
Q 3.086619356061156 1.2658e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1951  
   data-arc span      25220 days (69.05 yr)  
   first obs. used      1951-11-28  
   last obs. used      2020-12-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50427  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:57:51  

Additional Information
 Earth MOID = 1.06178 au 
 Jupiter MOID = 2.39606 au 
 T_jup = 3.387 
[ 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 13.72   n/a E2021B10  
diameter diameter 4.973 km 0.300 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.284   0.056 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19555 (1999 JO77)          Discovered 1999-May-12 by LINEAR at Socorro
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 JO77 = 1971 ST = 1975 RG2 = 1998 FV17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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