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20711 (1999 XF12)
Classification: Main-belt Asteroid          SPK-ID: 2020711
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .298018800428972 2.1469e-08  
a 3.170080569432353 1.7791e-08 au
q 2.22533696086693 6.8563e-08 au
i 18.36629020281663 3.8651e-07 deg
node 230.981384631158 3.8473e-06 deg
peri 236.0488428501821 4.5471e-06 deg
M 200.1758443169327 5.549e-06 deg
tp 2460115.758551363930
(2023-Jun-20.25855136)
3.6619e-05 TDB
period 2061.59749183598
5.64
1.7355e-05
4.752e-08
d
yr
n .1746218655317618 1.47e-09 deg/d
Q 4.114824177997774 2.3093e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1526  
   data-arc span      25470 days (69.73 yr)  
   first obs. used      1950-12-11  
   last obs. used      2020-09-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47558  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:27:47  

Additional Information
 Earth MOID = 1.29469 au 
 Jupiter MOID = 1.50796 au 
 T_jup = 3.056 
[ 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 12.84   n/a E2021B10  
diameter diameter 6.904 km 0.543 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 22.872 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.162   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20711 (1999 XF12)          Discovered 1999-Dec-05 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XF12 = 1990 BJ6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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