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

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1031665560459276 1.3117e-08  
a 2.604536306451984 1.2391e-08 au
q 2.335835265618752 3.7388e-08 au
i 11.92761930493576 4.3704e-07 deg
node 298.3151490949327 1.6282e-06 deg
peri 176.0359710614422 1.2006e-05 deg
M 234.2123071339712 1.5732e-05 deg
tp 2459736.950557926228
(2022-Jun-06.45055793)
6.9152e-05 TDB
period 1535.302830135603
4.20
1.0956e-05
3e-08
d
yr
n .2344814279852552 1.6733e-09 deg/d
Q 2.873237347285216 1.3669e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2623  
   data-arc span      25495 days (69.80 yr)  
   first obs. used      1951-03-28  
   last obs. used      2021-01-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .34822  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:36:11  

Additional Information
 Earth MOID = 1.35224 au 
 Jupiter MOID = 2.22723 au 
 T_jup = 3.375 
[ 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 12.96   n/a E2021B10  
diameter diameter 7.314 km 0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.598 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Albers, K.; Kragh, K.; Monnier, A.; Pligge, Z.; et al. (2010) Minor Planet Bull. 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. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.301   0.065 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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