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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2563344854199351 4.2423e-08  
a 2.423348713861623 1.0075e-08 au
q 1.802160868300842 1.0044e-07 au
i 9.857470608770068 5.339e-06 deg
node 340.9599092542962 2.4299e-05 deg
peri 71.4159538365894 2.6695e-05 deg
M 231.6203857495778 1.2768e-05 deg
tp 2459691.878173082529
(2022-Apr-22.37817308)
5.0784e-05 TDB
period 1377.914580461738
3.77
8.5927e-06
2.353e-08
d
yr
n .2612643810470199 1.6292e-09 deg/d
Q 3.044536559422403 1.2657e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1179  
   data-arc span      10538 days (28.85 yr)  
   first obs. used      1991-08-08  
   last obs. used      2020-06-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4796  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:50:02  

Additional Information
 Earth MOID = .839529 au 
 Jupiter MOID = 2.44869 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 14.57   n/a MPCxxxxx  
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. 2020-October); 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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