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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 
[ show covariance matrix ]

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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