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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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .165452652902818 3.2277e-08  
a 2.56906347422836 1.0094e-08 au
q 2.144005106941547 8.3335e-08 au
i 7.760684773400982 4.8672e-06 deg
node 32.75300945216508 3.8598e-05 deg
peri 60.63595273580634 4.3636e-05 deg
M 235.9223303929674 2.1161e-05 deg
tp 2459518.884259665422
(2021-Oct-31.38425967)
8.9361e-05 TDB
period 1504.044475291906
4.12
8.8643e-06
2.427e-08
d
yr
n .2393546240912397 1.4107e-09 deg/d
Q 2.994121841515172 1.1764e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1468  
   data-arc span      8221 days (22.51 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51363  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:41:09  

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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1920-May-09 23:27 00:03 Iris 0.0496144185255567 0.0496079709729176 0.0496208676067203 4.34320384512433 4.34320381844622 2422454.477211436 2.96861984415754 546.844611879319 62.3448557959763 -54.5267815250109 97226.9584336616 T 29 CATAB v2.0f-lin.ifort 2020-Nov-12 20:41:12 2020-Nov-12 20:41

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