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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1567732298882605 6.4519e-09  
a 2.225580366570484 4.4491e-09 au
q 1.876668944127331 1.4205e-08 au
i 6.420044859580264 2.7998e-07 deg
node 79.88504949447353 3.1833e-06 deg
peri 317.3286649695315 9.0699e-06 deg
M 263.7713099325293 6.8322e-06 deg
tp 2459524.664477348037
(2021-Nov-06.16447735)
2.3482e-05 TDB
period 1212.727844091713
3.32
3.6365e-06
9.956e-09
d
yr
n .2968514343542812 8.9013e-10 deg/d
Q 2.574491789013638 5.1465e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2863  
   data-arc span      33613 days (92.03 yr)  
   first obs. used      1928-09-21  
   last obs. used      2020-10-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41066  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:01:12  

Additional Information
 Earth MOID = .889357 au 
 Jupiter MOID = 2.83219 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 11.70   n/a E2021B10  
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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