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21023 (1989 DK)
Classification: Main-belt Asteroid          SPK-ID: 2021023
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .103596734165894 9.6367e-08  
a 2.604640758136116 2.1521e-08 AU
q 2.334808481917836 2.5362e-07 AU
i 11.91839160900873 9.3484e-06 deg
node 298.3780428949765 3.0862e-05 deg
peri 174.6520506002726 6.8577e-05 deg
M 33.05817277594077 5.2063e-05 deg
tp 2456659.507334972320
(2014-Jan-02.00733497)
0.00022253 JED
period 1535.395188172806
4.20
1.903e-05
5.21e-08
d
yr
n .2344673233139523 2.906e-09 deg/d
Q 2.874473034354395 2.3751e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      901  
   data-arc span      23063 days (63.14 yr)  
   first obs. used      1951-03-28  
   last obs. used      2014-05-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .44321  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 14:08:48  

Additional Information
 Earth MOID = 1.35125 AU 
 T_jup = 3.375 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.7 mag n/a MPO279733  
rotation period rot_per 7.598 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Published Reference List:
[Albers, K.; Kragh, K.; Monnier, A.; Pligge, Z.; et al. (2010) Minor Planet Bul. 37, 152-158.]

21023 (1989 DK)          Discovered 1989-Feb-28 by Debehogne, H. at La Silla (809)
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1989 DK = 1979 YY = 1993 AE 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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