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66621 (1999 RD204)
Classification: Main-belt Asteroid          SPK-ID: 2066621
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1629775771992181 3.9713e-08  
a 2.691681029527148 1.4823e-08 au
q 2.252997376741717 1.0972e-07 au
i 12.51317083862791 5.3707e-06 deg
node 324.5805848852062 2.0542e-05 deg
peri 310.1563819595208 2.6856e-05 deg
M 3.896215402452559 1.8376e-05 deg
tp 2459183.042812540245
(2020-Nov-29.54281254)
8.231e-05 TDB
period 1612.997957339766
4.42
1.3324e-05
3.648e-08
d
yr
n .223186891441406 1.8436e-09 deg/d
Q 3.13036468231258 1.7239e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1069  
   data-arc span      14168 days (38.79 yr)  
   first obs. used      1981-09-28  
   last obs. used      2020-07-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51766  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:23:47  

Additional Information
 Earth MOID = 1.25705 au 
 Jupiter MOID = 2.13873 au 
 T_jup = 3.319 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.42   n/a E2021B10  
diameter diameter 3.795 km 0.662 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.256   0.151 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

66621 (1999 RD204)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RD204 = 1999 SW25 = 2000 XF32 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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