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JPL Small-Body Database Browser
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732 Tjilaki (A912 HK)
Classification: Main-belt Asteroid          SPK-ID: 2000732
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04362437022202302 3.4775e-08  
a 2.456132295052366 7.1798e-09 au
q 2.348985070498734 8.5011e-08 au
i 10.99404951825472 4.2348e-06 deg
node 173.3458000553434 1.8478e-05 deg
peri 64.90028276135513 5.0982e-05 deg
M 359.8028028530858 4.6441e-05 deg
tp 2459001.270147990642
(2020-May-31.77014799)
0.00018137 TDB
period 1405.970020205215
3.85
6.1649e-06
1.688e-08
d
yr
n .2560509789159334 1.1227e-09 deg/d
Q 2.563279519605997 7.493e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2843  
   data-arc span      38959 days (106.66 yr)  
   first obs. used      1913-08-28  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41495  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:11:42  

Additional Information
 Earth MOID = 1.36243 au 
 Jupiter MOID = 2.42802 au 
 T_jup = 3.466 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456195.5 (2012-Sep-25.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04454515518171746 3.4733e-08  
q 2.347139886318434 8.503e-08 au
tp 2456188.427567691821
(2012-Sep-17.92756769)
0.00017992 TDB
node 173.3937603587715 1.8494e-05 deg
peri 64.74779782948485 5.0044e-05 deg
i 10.98794841610968 4.2329e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2843  
   data-arc span      38959 days (106.66 yr)  
   first obs. used      1913-08-28  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41495  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:11:42  

Additional Information
 Jupiter MOID = 2.42802 au 
 T_jup = 3.466 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.20637493115612E-15 -2.943629711751103E-15 -1.236616037140124E-12 3.421320793193167E-16 -3.110103814366297E-13 -1.671630078614264E-16
q -2.943629711751103E-15 7.230093452213842E-15 2.739411954423652E-12 -9.950080693668073E-16 6.858637191753179E-13 4.81378110809497E-16
tp -1.236616037140124E-12 2.739411954423652E-12 3.237291407713205E-8 8.9081112132739E-12 8.377328669370139E-9 1.333568678751715E-14
node 3.421320793193167E-16 -9.950080693668073E-16 8.9081112132739E-12 3.420383841480382E-10 -3.329821582867201E-10 9.57498461633053E-12
peri -3.110103814366297E-13 6.858637191753179E-13 8.377328669370139E-9 -3.329821582867201E-10 2.504386308626927E-9 -9.376145789363062E-12
i -1.671630078614264E-16 4.81378110809497E-16 1.333568678751715E-14 9.57498461633053E-12 -9.376145789363062E-12 1.79170737600494E-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 10.5   n/a MPO365251  
diameter diameter 29.791 km 0.431 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 12.34 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Florczak, M.; Dotto, E.; Barucci, M.A.; Birlan, M.; et al. (1997) Planet. Space Sci. 45, 1423-1435.]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.138   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

732 Tjilaki (A912 HK)          Discovered 1912-Apr-15 by Massinger, A. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A912 HK = 1958 FC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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