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226608 (2004 DQ21)
Classification: Main-belt Asteroid          SPK-ID: 2226608
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09528822396300937 5.4269e-08  
a 2.307145745386271 1.7194e-08 au
q 2.0873019248846 1.2511e-07 au
i 4.33738494748363 5.5129e-06 deg
node 247.8895262393637 8.9151e-05 deg
peri 338.8374813975165 9.5109e-05 deg
M 66.2237723813698 3.3491e-05 deg
tp 2458365.037154551544
(2018-Sep-03.53715455)
0.00011884 TDB
period 1280.002955332861
3.50
1.4309e-05
3.918e-08
d
yr
n .2812493506363687 3.144e-09 deg/d
Q 2.526989565887942 1.8832e-08 au
  Orbit Determination Parameters
   # obs. used (total)      225  
   data-arc span      8680 days (23.76 yr)  
   first obs. used      1995-11-30  
   last obs. used      2019-09-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54693  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 04:09:40  

Additional Information
 Earth MOID = 1.07798 au 
 Jupiter MOID = 2.46021 au 
 T_jup = 3.577 
[ 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 16.6   n/a MPO450051  
rotation period rot_per 5.102 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

226608 (2004 DQ21)          Discovered 2004-Feb-17 by CSS at Catalina
Reference: 20091202/Numbers.arcLast Updated: 2009-12-04

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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