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101229 (1998 SJ71)
Classification: Main-belt Asteroid          SPK-ID: 2101229
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2480980843641679 3.5325e-08  
a 2.364467600877763 8.0966e-09 au
q 1.77784771855885 8.2841e-08 au
i 6.56429303553899 4.1476e-06 deg
node 24.45965037788402 3.3892e-05 deg
peri 318.4051567687847 3.4799e-05 deg
M 59.29661212657943 7.7981e-06 deg
tp 2458981.761183378218
(2020-May-12.26118338)
2.8343e-05 TDB
period 1328.001232443832
3.64
6.8212e-06
1.868e-08
d
yr
n .2710840857711524 1.3924e-09 deg/d
Q 2.951087483196676 1.0105e-08 au
  Orbit Determination Parameters
   # obs. used (total)      932  
   data-arc span      8177 days (22.39 yr)  
   first obs. used      1998-09-21  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56252  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:35:49  

Additional Information
 Earth MOID = .775192 au 
 Jupiter MOID = 2.477 au 
 T_jup = 3.498 
[ 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 15.78   n/a E2021B55  
diameter diameter 1.774 km 0.282 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.354   0.121 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101229 (1998 SJ71)          Discovered 1998-Sep-21 by Elst, E. W. at La Silla
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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