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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2991319638620708 3.7062e-08  
a 3.167398611449785 1.9602e-08 au
q 2.219928444472814 1.1529e-07 au
i 18.42737013151132 4.4927e-06 deg
node 231.2854974448901 1.5262e-05 deg
peri 235.6575578367878 1.7028e-05 deg
M 165.4162900878329 8.0733e-06 deg
tp 2458054.419076783841
(2017-Oct-27.91907678)
4.3734e-05 TDB
period 2058.981809935231
5.64
1.9113e-05
5.233e-08
d
yr
n .1748437010287742 1.623e-09 deg/d
Q 4.114868778426755 2.5465e-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 = 1.28926 au 
 Jupiter MOID = 1.50518 au 
 T_jup = 3.055 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456704.5 (2014-Feb-16.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3020991594516563 3.6836e-08  
q 2.201072865735827 1.1509e-07 au
tp 2456006.051509193246
(2012-Mar-19.55150919)
4.2781e-05 TDB
node 231.5426205252717 1.5192e-05 deg
peri 234.5388486067304 1.7008e-05 deg
i 18.54495274810911 4.5e-06 deg
  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
 Jupiter MOID = 1.50518 au 
 T_jup = 3.055 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.356856018087639E-15 -4.211208972872975E-15 2.264001729821832E-13 4.824070792039733E-15 7.397624220534178E-14 -2.2247641646444E-15
q -4.211208972872975E-15 1.324485559912817E-14 -8.468400056470526E-13 -1.074139548971901E-14 -2.453250632614649E-13 4.669718160365826E-15
tp 2.264001729821832E-13 -8.468400056470526E-13 1.830206172336715E-9 5.678014166142914E-15 3.575459227158152E-10 1.27757004504121E-12
node 4.824070792039733E-15 -1.074139548971901E-14 5.678014166142914E-15 2.308021628180461E-10 -2.180123481150248E-10 -1.034057351154914E-11
peri 7.397624220534178E-14 -2.453250632614649E-13 3.575459227158152E-10 -2.180123481150248E-10 2.892811047920921E-10 9.648463105262442E-12
i -2.2247641646444E-15 4.669718160365826E-15 1.27757004504121E-12 -1.034057351154914E-11 9.648463105262442E-12 2.025006537477487E-11

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-August); 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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