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1123 Shapleya (1928 ST)
Classification: Main-belt Asteroid          SPK-ID: 2001123
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1570908638459184 3.3324e-08  
a 2.224770427275755 5.2351e-09 au
q 1.875279318996154 7.3704e-08 au
i 6.421527551231975 3.3714e-06 deg
node 79.88639269982076 3.1092e-05 deg
peri 317.4318034679794 3.3137e-05 deg
M 204.2851618145659 1.3881e-05 deg
tp 2459524.768457732830
(2021-Nov-06.26845773)
4.7842e-05 TDB
period 1212.065895474011
3.32
4.2782e-06
1.171e-08
d
yr
n .2970135545800605 1.0484e-09 deg/d
Q 2.574261535555357 6.0575e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2814  
   data-arc span      33613 days (92.03 yr)  
   first obs. used      1928-09-21  
   last obs. used      2020-10-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4085  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:22:15  

Additional Information
 Earth MOID = .888994 au 
 Jupiter MOID = 2.83131 au 
 T_jup = 3.622 
[ 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 11.6   n/a MPO425810  
diameter diameter 11.282 km 0.136 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 52.92 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Stephens, R.D. (2012) Minor Planet Bull. 39, 80-82.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.278   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1123 Shapleya (1928 ST)          Discovered 1928-Sep-21 by Neujmin, G. at Simeis
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1928 ST = 1974 QQ2 = 2016 FJ6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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