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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1656962210656878 3.2071e-08  
a 2.567711159186018 9.8601e-09 au
q 2.142251123320698 8.2933e-08 au
i 7.762409785576614 4.8495e-06 deg
node 32.72922906970253 3.8064e-05 deg
peri 60.83400882794451 4.3107e-05 deg
M 283.6421193332644 2.109e-05 deg
tp 2459519.263836255631
(2021-Oct-31.76383626)
8.864e-05 TDB
period 1502.857073166763
4.11
8.6566e-06
2.37e-08
d
yr
n .2395437373438458 1.3798e-09 deg/d
Q 2.993171195051338 1.1494e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1525  
   data-arc span      8330 days (22.81 yr)  
   first obs. used      1998-04-21  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51016  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:43:39  

Additional Information
 Earth MOID = 1.17084 au 
 Jupiter MOID = 2.24079 au 
 T_jup = 3.399 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457212.5 (2015-Jul-09.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1657654658331354 3.1097e-08  
q 2.142512532677665 8.0134e-08 au
tp 2456506.865610208551
(2013-Aug-02.36561021)
8.3752e-05 TDB
node 32.93804930027282 3.7942e-05 deg
peri 59.62571149776807 4.3122e-05 deg
i 7.777191193434262 4.8513e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1525  
   data-arc span      8330 days (22.81 yr)  
   first obs. used      1998-04-21  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51016  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:43:39  

Additional Information
 Jupiter MOID = 2.24079 au 
 T_jup = 3.399 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.670049479503526E-16 -2.478500452908108E-15 1.345169767325341E-12 6.23159016981185E-15 3.431915784042228E-13 -1.305921504786647E-15
q -2.478500452908108E-15 6.421484103363452E-15 -3.295806931387327E-12 -1.545655742270195E-14 -8.361414252446671E-13 3.522882537496484E-15
tp 1.345169767325341E-12 -3.295806931387327E-12 7.014418669352573E-9 3.276185560936304E-11 1.754346385352232E-9 -5.730181648748597E-12
node 6.23159016981185E-15 -1.545655742270195E-14 3.276185560936304E-11 1.439571471389911E-9 -1.417722922462875E-9 -1.199229429840278E-10
peri 3.431915784042228E-13 -8.361414252446671E-13 1.754346385352232E-9 -1.417722922462875E-9 1.859517523384828E-9 1.174092673044187E-10
i -1.305921504786647E-15 3.522882537496484E-15 -5.730181648748597E-12 -1.199229429840278E-10 1.174092673044187E-10 2.353498693176789E-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 14.19   n/a E2020-QM9  
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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