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1926 Demiddelaer (1935 JA)
Classification: Main-belt Asteroid          SPK-ID: 2001926
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1094009263642926 3.3469e-08  
a 2.655112034626838 8.9079e-09 au
q 2.36464031843768 8.9108e-08 au
i 13.72325344783951 3.3665e-06 deg
node 93.41815480368339 1.5652e-05 deg
peri 91.30609808344708 2.1861e-05 deg
M 166.9139887363329 1.6316e-05 deg
tp 2457867.822358906645
(2017-Apr-24.32235891)
7.0427e-05 TDB
period 1580.238737271234
4.33
7.9526e-06
2.177e-08
d
yr
n .2278136787240453 1.1465e-09 deg/d
Q 2.945583750815995 9.8825e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2423  
   data-arc span      30896 days (84.59 yr)  
   first obs. used      1935-05-02  
   last obs. used      2019-12-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39233  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:07:49  

Additional Information
 Earth MOID = 1.41453 au 
 Jupiter MOID = 2.17188 au 
 T_jup = 3.339 
[ 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 11.0   n/a MPO416727  
diameter diameter 17.752 km 0.415 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 32.095 h n/a LCDB (Rev. 2019-January); 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:
[Polakis, T.; Skiff, B.A. (2017) Minor Planet Bull. 44, 299-302.]
geometric albedo albedo 0.128   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1926 Demiddelaer (1935 JA)          Discovered 1935-May-02 by Delporte, E. at Uccle
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1935 JA = 1959 XD = 1970 LE = 1974 HB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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