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21041 (1990 QO1)
Classification: Main-belt Asteroid          SPK-ID: 2021041
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04595760248894389 7.3998e-08  
a 3.002156989870465 3.7925e-08 au
q 2.864185052320594 2.3476e-07 au
i 10.11711694058149 8.7024e-06 deg
node 337.1507441559806 3.8488e-05 deg
peri 261.273538271918 0.00010701 deg
M 58.36801297573554 0.00010006 deg
tp 2457092.450198600747
(2015-Mar-10.95019860)
0.00052925 JED
period 1899.977793484816
5.20
3.6002e-05
9.857e-08
d
yr
n .1894758987365381 3.5903e-09 deg/d
Q 3.140128927420336 3.9668e-08 au
  Orbit Determination Parameters
   # obs. used (total)      818  
   data-arc span      14037 days (38.43 yr)  
   first obs. used      1977-01-13  
   last obs. used      2015-06-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51998  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:28:21  

Additional Information
 Earth MOID = 1.87497 au 
 Jupiter MOID = 1.92324 au 
 T_jup = 3.227 
[ 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 13.0 mag n/a MPO302194  
rotation period rot_per 5.0768 h n/a LCDB (Rev. 2015-December); 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.]

21041 (1990 QO1)          Discovered 1990-Aug-22 by Holt, H. E. at Palomar
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 QO1 = 1977 AD2 = 2000 PZ22 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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