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21783 (1999 RR248)
Classification: Main-belt Asteroid          SPK-ID: 2021783
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06444902294963263 3.4676e-08  
a 2.648488230862502 1.3993e-08 au
q 2.477795752089813 9.1722e-08 au
i 4.000572542225143 3.7136e-06 deg
node 118.6435283003801 7.7361e-05 deg
peri 348.564458556245 9.0385e-05 deg
M 201.2927034576188 4.5781e-05 deg
tp 2459894.548613593057
(2022-Nov-11.04861359)
0.00020047 TDB
period 1574.329009043253
4.31
1.2476e-05
3.416e-08
d
yr
n .2286688474468105 1.8122e-09 deg/d
Q 2.819180709635191 1.4894e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1061  
   data-arc span      10484 days (28.70 yr)  
   first obs. used      1991-10-07  
   last obs. used      2020-06-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54216  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:55:00  

Additional Information
 Earth MOID = 1.49458 au 
 Jupiter MOID = 2.24606 au 
 T_jup = 3.385 
[ 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 14.89   n/a E2021B10  
diameter diameter 3.410 km 0.205 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.200   0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21783 (1999 RR248)          Discovered 1999-Sep-07 by Spacewatch at Kitt Peak
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RR248 = 2000 WG180 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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