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JPL Small-Body Database Browser
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71212 (1999 XX257)
Classification: Main-belt Asteroid          SPK-ID: 2071212
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1494777646649826 3.5987e-08  
a 2.699763200686464 1.5552e-08 au
q 2.296208632323072 9.5142e-08 au
i 12.91474803716677 5.5022e-06 deg
node 58.46378050291943 2.0192e-05 deg
peri 69.67502091513137 2.8688e-05 deg
M 120.2472924674637 1.9949e-05 deg
tp 2458059.297564196675
(2017-Nov-01.79756420)
8.8853e-05 TDB
period 1620.268306181736
4.44
1.4e-05
3.833e-08
d
yr
n .2221854236279932 1.9198e-09 deg/d
Q 3.103317769049855 1.7877e-08 au
  Orbit Determination Parameters
   # obs. used (total)      933  
   data-arc span      13745 days (37.63 yr)  
   first obs. used      1980-09-30  
   last obs. used      2018-05-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4862  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-May-31 15:18:56  

Additional Information
 Earth MOID = 1.3485 au 
 Jupiter MOID = 2.11425 au 
 T_jup = 3.316 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456528.5 (2013-Aug-24.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1493214410134747 3.5829e-08  
q 2.294170292702272 9.4518e-08 au
tp 2456437.909764673249
(2013-May-25.40976467)
8.7265e-05 TDB
node 58.48973395178343 2.0186e-05 deg
peri 68.96865796100788 2.8789e-05 deg
i 12.9209656187536 5.5063e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      933  
   data-arc span      13745 days (37.63 yr)  
   first obs. used      1980-09-30  
   last obs. used      2018-05-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4862  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-May-31 15:18:56  

Additional Information
 Jupiter MOID = 2.11425 au 
 T_jup = 3.316 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.283708971872988E-15 -3.355647033929129E-15 3.306613482763618E-13 2.689632924241372E-15 6.730551453034787E-14 -2.070780367457706E-15
q -3.355647033929129E-15 8.933612998206216E-15 -8.115706568912902E-13 -6.810579209815746E-15 -1.615253379620034E-13 5.338041190198553E-15
tp 3.306613482763618E-13 -8.115706568912902E-13 7.61526279485577E-9 -6.408282843828532E-12 1.811674409913384E-9 -4.198296345431992E-12
node 2.689632924241372E-15 -6.810579209815746E-15 -6.408282843828532E-12 4.074662724033541E-10 -3.981564078125882E-10 -3.296000932986679E-11
peri 6.730551453034787E-14 -1.615253379620034E-13 1.811674409913384E-9 -3.981564078125882E-10 8.287908555535573E-10 3.111744181012996E-11
i -2.070780367457706E-15 5.338041190198553E-15 -4.198296345431992E-12 -3.296000932986679E-11 3.111744181012996E-11 3.031932038934217E-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 14.4   n/a MPO436281  

71212 (1999 XX257)          Discovered 1999-Dec-07 by CSS at Catalina
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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