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91112 (1998 HJ52)
Classification: Main-belt Asteroid          SPK-ID: 2091112
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .16545265450025 3.3826e-08  
a 2.569063472686252 1.2019e-08 au
q 2.144005101550681 8.5752e-08 au
i 7.760690284685497 5.4858e-06 deg
node 32.75300789591798 3.8603e-05 deg
peri 60.63595915408251 4.4817e-05 deg
M 235.9223268235347 2.1973e-05 deg
tp 2459518.884274111411
(2021-Oct-31.38427411)
9.218e-05 TDB
period 1504.044473937678
4.12
1.0555e-05
2.89e-08
d
yr
n .2393546243067525 1.6797e-09 deg/d
Q 2.994121843821822 1.4008e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1270  
   data-arc span      7748 days (21.21 yr)  
   first obs. used      1998-04-21  
   last obs. used      2019-07-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55982  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:23:42  

Additional Information
 Earth MOID = 1.17279 au 
 Jupiter MOID = 2.24063 au 
 T_jup = 3.399 
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Orbital Elements at Epoch 2456467.5 (2013-Jun-24.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1663284009377158 3.3311e-08  
q 2.141682051458763 8.4401e-08 au
tp 2456507.480646697439
(2013-Aug-02.98064670)
9.0223e-05 TDB
node 32.97237232345621 3.8458e-05 deg
peri 59.73155879931672 4.4723e-05 deg
i 7.778617893051798 5.4912e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1270  
   data-arc span      7748 days (21.21 yr)  
   first obs. used      1998-04-21  
   last obs. used      2019-07-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55982  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:23:42  

Additional Information
 Jupiter MOID = 2.24063 au 
 T_jup = 3.399 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.109630713319228E-15 -2.793716436867426E-15 9.36973946754772E-13 7.534052460268998E-15 2.162474410645436E-13 -3.541135805068857E-15
q -2.793716436867426E-15 7.123450569720438E-15 -2.435513729643774E-12 -1.773155835811386E-14 -5.679772986812755E-13 9.085451612889008E-15
tp 9.36973946754772E-13 -2.435513729643774E-12 8.140262073564422E-9 4.241766423699767E-11 2.092126395130574E-9 -1.772407340197438E-11
node 7.534052460268998E-15 -1.773155835811386E-14 4.241766423699767E-11 1.479049581770623E-9 -1.454186702900655E-9 -1.188313204989641E-10
peri 2.162474410645436E-13 -5.679772986812755E-13 2.092126395130574E-9 -1.454186702900655E-9 2.000136104250823E-9 1.131926149742339E-10
i -3.541135805068857E-15 9.085451612889008E-15 -1.772407340197438E-11 -1.188313204989641E-10 1.131926149742339E-10 3.01531377093853E-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 14.2   n/a MPO299529  
diameter diameter 3.601 km 0.876 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.312   0.115 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91112 (1998 HJ52)          Discovered 1998-Apr-25 by Zoltowski, F. B. at Woomera
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

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Alternate Designations
 1998 HJ52 = 2000 RZ49 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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