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20050 (1993 FO21)
Classification: Main-belt Asteroid          SPK-ID: 2020050
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05780503198593945 4.6459e-08  
a 2.728346411226377 1.4376e-08 au
q 2.570634259656713 1.3053e-07 au
i 4.92189600065775 5.9142e-06 deg
node 5.759802071763607 4.4051e-05 deg
peri 30.87247362048791 6.2982e-05 deg
M 162.6860477197638 4.629e-05 deg
tp 2458256.632643431298
(2018-May-18.13264343)
0.00020936 TDB
period 1646.067699831398
4.51
1.301e-05
3.562e-08
d
yr
n .2187030339255632 1.7286e-09 deg/d
Q 2.88605856279604 1.5207e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1168  
   data-arc span      10889 days (29.81 yr)  
   first obs. used      1990-08-24  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54459  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:05:04  

Additional Information
 Earth MOID = 1.5782 au 
 Jupiter MOID = 2.3554 au 
 T_jup = 3.348 
[ 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 14.7   n/a MPO340841  
diameter diameter 6.094 km 0.106 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 184.311 h n/a LCDB (Rev. 2019-August); 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.]
geometric albedo albedo 0.063   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20050 (1993 FO21)          Discovered 1993-Mar-21 by UESAC at La Silla
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1993 FO21 = 1990 QM16 = 1995 UE23 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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