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21779 (1999 RE231)
Classification: Main-belt Asteroid          SPK-ID: 2021779
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .119714773256457 4.464e-08  
a 2.553312692889166 1.0007e-08 au
q 2.247643442807106 1.1246e-07 au
i 10.44790741432634 4.7704e-06 deg
node 120.223527710905 1.6936e-05 deg
peri 178.9303749856797 2.2536e-05 deg
M 171.9977193334837 1.3604e-05 deg
tp 2458684.508808663365
(2019-Jul-20.00880866)
5.5839e-05 TDB
period 1490.233881440136
4.08
8.7611e-06
2.399e-08
d
yr
n .2415728191954019 1.4202e-09 deg/d
Q 2.858981942971226 1.1205e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1384  
   data-arc span      10275 days (28.13 yr)  
   first obs. used      1992-12-24  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50593  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:53:16  

Additional Information
 Earth MOID = 1.2315 au 
 Jupiter MOID = 2.34852 au 
 T_jup = 3.406 
[ 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 14.56   n/a MPCxxxxx  
diameter diameter 3.115 km 0.135 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.200   0.064 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21779 (1999 RE231)          Discovered 1999-Sep-08 by CSS at Catalina
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RE231 = 1998 HU114 = 1999 VZ202 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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