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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1034171450856576 7.7688e-08  
a 2.60398747508919 1.9964e-08 AU
q 2.334690524576656 2.0012e-07 AU
i 11.9182235598228 8.4657e-06 deg
node 298.3767275562818 2.9788e-05 deg
peri 174.5590942944189 5.1977e-05 deg
M 80.06328009003525 3.756e-05 deg
tp 2456659.159640768671
(2014-Jan-01.65964077)
0.00016026 JED
period 1534.817574112511
4.20
1.7651e-05
4.833e-08
d
yr
n .2345555628708288 2.6974e-09 deg/d
Q 2.873284425601724 2.2029e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      919  
   data-arc span      23462 days (64.24 yr)  
   first obs. used      1951-03-28  
   last obs. used      2015-06-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .44227  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:28:18  

Additional Information
 Earth MOID = 1.35138 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 LCDB (Rev. 2015-May); Warner et al., 2009 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
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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