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21776 Kryszczynska (1999 RE221)
Classification: Main-belt Asteroid          SPK-ID: 2021776
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1288659577994463 3.7835e-08  
a 2.620674619531891 1.1441e-08 au
q 2.282958874605214 1.0351e-07 au
i 5.483232825793863 3.406e-06 deg
node 90.51482253636675 4.4222e-05 deg
peri 311.7602905647558 4.6992e-05 deg
M 328.5568413867611 1.6776e-05 deg
tp 2459335.844853595715
(2021-May-01.34485360)
7.251e-05 TDB
period 1549.594552308823
4.24
1.0148e-05
2.778e-08
d
yr
n .2323188342806297 1.5213e-09 deg/d
Q 2.958390364458567 1.2915e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1106  
   data-arc span      10159 days (27.81 yr)  
   first obs. used      1993-03-17  
   last obs. used      2021-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53321  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:54:24  

Additional Information
 Earth MOID = 1.29531 au 
 Jupiter MOID = 2.42301 au 
 T_jup = 3.387 
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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 14.9   n/a MPO344474  
diameter diameter 3.453 km 0.883 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.195   0.136 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21776 Kryszczyńska           Discovered 1999 Sept. 5 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Agnieszka Kryszczyńska (b. 1965) is a planetary scientist at Adam Mickiewicz University, Poznań. Using photometry, she has studied the physical properties of minor planets. She discovered the binary nature of (809) Lundia and maintains a database of the pole coordinates and shapes of minor planets.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080718/MPCPages.arcLast Updated: 2008-07-18

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Alternate Designations
 1999 RE221 = 1993 FD15 = 1995 WA41 = 1999 TW280 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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