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531224 (2012 HK85)
Classification: TransNeptunian Object          SPK-ID: 2531224
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3409286096233614 2.8401e-05  
a 57.93868591981703 0.0031103 au
q 38.18573028576918 0.00067432 au
i 4.810247721742342 8.6244e-05 deg
node 75.88345576363416 0.00080178 deg
peri 174.5195368128518 0.0050893 deg
M 348.895636776012 0.002773 deg
tp 2464169.197379287608
(2034-Jul-25.69737929)
0.9674 TDB
period 161083.6227582562
441.02
12.971
0.03551
d
yr
n .002234864065233152 1.7996e-07 deg/d
Q 77.69164155386487 0.0041707 au
  Orbit Determination Parameters
   # obs. used (total)      73  
   data-arc span      7438 days (20.36 yr)  
   first obs. used      2000-02-12  
   last obs. used      2020-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      2  
   norm. resid. RMS      .70443  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 19:49:13  

Additional Information
 Earth MOID = 37.1702 au 
 Jupiter MOID = 32.8425 au 
 T_jup = 6.342 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457282.5 (2015-Sep-17.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3403706076022787 2.8559e-05  
q 38.27491149088334 0.00066011 au
tp 2463953.895167402276
(2033-Dec-22.39516740)
0.97544 TDB
node 75.85337827592627 0.00080004 deg
peri 173.4614747462867 0.0050876 deg
i 4.8129530919339 8.6153e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      73  
   data-arc span      7438 days (20.36 yr)  
   first obs. used      2000-02-12  
   last obs. used      2020-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      2  
   norm. resid. RMS      .70443  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 19:49:13  

Additional Information
 Jupiter MOID = 32.8425 au 
 T_jup = 6.342 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.156327510177963E-10 9.201800810538668E-9 -8.720136973891428E-6 -1.866877625036655E-10 -4.189383227046373E-8 3.740396172918833E-11
q 9.201800810538668E-9 4.357447350710884E-7 -.0006296095929158873 -2.469555186906482E-9 -3.231782998416602E-6 6.19441957082746E-10
tp -8.720136973891428E-6 -.0006296095929158873 .9514738518034332 2.493208001509571E-6 .004899716131028359 -6.996138760377265E-7
node -1.866877625036655E-10 -2.469555186906482E-9 2.493208001509571E-6 6.400680510548846E-7 -6.255347997544986E-7 -6.840871618257966E-8
peri -4.189383227046373E-8 -3.231782998416602E-6 .004899716131028359 -6.255347997544986E-7 2.588362985822974E-5 6.466895006260754E-8
i 3.740396172918833E-11 6.19441957082746E-10 -6.996138760377265E-7 -6.840871618257966E-8 6.466895006260754E-8 7.422265931726351E-9

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 6.83   n/a E2021B25  

531224 (2012 HK85)          Discovered 2012-Apr-27 by Pan-STARRS 1 at Haleakala
Reference: Last Updated: 2019-05-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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