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46566 (1991 RW21)
Classification: Main-belt Asteroid          SPK-ID: 2046566
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2566359233921579 4.4067e-08  
a 2.422638400178192 1.0624e-08 au
q 1.800902357303162 1.0433e-07 au
i 9.857473829416039 6.5351e-06 deg
node 340.9723687877922 2.5328e-05 deg
peri 71.45156986364606 2.8441e-05 deg
M 179.2947359475432 1.3596e-05 deg
tp 2458314.543840470565
(2018-Jul-15.04384047)
4.9848e-05 TDB
period 1377.308798975815
3.77
9.0596e-06
2.48e-08
d
yr
n .2613792929136159 1.7193e-09 deg/d
Q 3.044374443053223 1.335e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1104  
   data-arc span      10491 days (28.72 yr)  
   first obs. used      1991-08-08  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48515  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 09:33:50  

Additional Information
 Earth MOID = .839134 au 
 Jupiter MOID = 2.44784 au 
 T_jup = 3.447 
[ 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 14.6   n/a MPO474338  
diameter diameter 6.513 km 0.063 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.074 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.073   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

46566 (1991 RW21)          Discovered 1991-Sep-11 by Holt, H. E. at Palomar
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 RW21 = 1996 DQ7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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