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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1030212409453371 7.7205e-08  
a 2.604911843344812 1.9909e-08 au
q 2.336550592690223 1.9872e-07 au
i 11.91637958793027 8.4142e-06 deg
node 298.3765836530101 2.9707e-05 deg
peri 174.6356309860035 5.1623e-05 deg
M 220.6889984131633 3.7336e-05 deg
tp 2458194.752320329856
(2018-Mar-17.25232033)
0.00015965 JED
period 1535.634895176594
4.20
1.7605e-05
4.82e-08
d
yr
n .2344307238203264 2.6876e-09 deg/d
Q 2.8732730939994 2.196e-08 au
  Orbit Determination Parameters
   # obs. used (total)      922  
   data-arc span      23473 days (64.27 yr)  
   first obs. used      1951-03-28  
   last obs. used      2015-07-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .44778  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:56:19  

Additional Information
 Earth MOID = 1.35173 au 
 Jupiter MOID = 2.23638 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. 2016-February); Warner et al., 2009 Published Reference List:
[Albers, K.; Kragh, K.; Monnier, A.; Pligge, Z.; et al. (2010) Minor Planet Bul. 37, 152-158.]
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2016) Astron. J. 150, A75.]

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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