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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3011562454520623 3.6965e-08  
a 3.157792536725364 1.8827e-08 au
q 2.20680359244861 1.1497e-07 au
i 18.53513120282478 4.4968e-06 deg
node 231.498413758928 1.5194e-05 deg
peri 234.8999597890003 1.7017e-05 deg
M 96.04569489145102 7.7161e-06 deg
tp 2458053.673919119357
(2017-Oct-27.17391912)
4.2657e-05 TDB
period 2049.622206799751
5.61
1.833e-05
5.018e-08
d
yr
n .1756421250734292 1.5708e-09 deg/d
Q 4.108781481002119 2.4497e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1233  
   data-arc span      24986 days (68.41 yr)  
   first obs. used      1950-12-11  
   last obs. used      2019-05-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46805  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:54:58  

Additional Information
 Earth MOID = 1.2757 au 
 Jupiter MOID = 1.50605 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 12.8   n/a MPO266064  
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. 2019-January); 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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